Sample records for induction motor control

  1. FPGA-Based Dynamically Reconfigurable Control of Induction Motor Drives

    E-print Network

    Paderborn, Universität

    FPGA-Based Dynamically Reconfigurable Control of Induction Motor Drives Oleg Buchholz, Joachim. Keywords--FPGA; FOC; DTC; reconfigurable control; induction motor I. INTRODUCTION In the field on a FPGA- based platform. FPGA platforms offer several advantages over sequential working processors

  2. A Fault Tolerant Control Design for Induction Motors

    Microsoft Academic Search

    Afef Fekih; Fahmida N. Chowdhury

    2005-01-01

    This paper describes a fault tolerant controller for high performance induction motor drive. The proposed approach aims to make the motor tolerant to both internal and external factors such as loading, temperature and sensor failure. To achieve this goal, a controller that switches itself between a control strategy designed for nominal operation and a robust control strategy designed for faulty

  3. Particle Swarm Optimized Direct Torque Control of Induction Motors

    Microsoft Academic Search

    O. S. El-Laban; H. A. Abdel Fattah; H. M. Emara; A. F. Sakr

    2006-01-01

    The flux and torque hysteresis bands are the only adjustable parameters in direct torque control (DTC) of induction motors. Their selection greatly influences the inverter switching loss, motor harmonic loss and motor torque ripples, which are major performance criteria. In this paper, the effects of flux and torque hysteresis bands on these criteria are investigated and optimized via the minimization,

  4. Vector control of induction motor without shaft encoder

    Microsoft Academic Search

    T. Ohtani; N. Takada; K. Tanaka

    1989-01-01

    A method of torque control in induction motor drives that requires not shaft encoder is presented. Both the torque control and the speed control are based on vector control. The proposed scheme of vector control is based on the self-control of rotor flux velocity, which is controlled with the torque-producing current and the rotor flux derived from the stator voltages

  5. Control system for an induction motor with energy recovery

    SciTech Connect

    Nola, F.J.

    1983-11-22

    A control circuit for an induction motor powered system wherein a power factor controlled servo loop is used to control, via the phase angle of firing of a triac, the power input to the motor as a function of load placed on the motor by machinery of the powered system. Then, upon application of torque by this machinery to the motor, which tends to overspeed the motor, the firing angle of the triac is automatically set to a fixed, and relatively short, firing angle.

  6. Field-Oriented Control Of Induction Motors

    NASA Technical Reports Server (NTRS)

    Burrows, Linda M.; Roth, Mary Ellen; Zinger, Don S.

    1993-01-01

    Field-oriented control system provides for feedback control of torque or speed or both. Developed for use with commercial three-phase, 400-Hz, 208-V, 5-hp motor. Systems include resonant power supply operating at 20 kHz. Pulse-population-modulation subsystem selects individual pulses of 20-kHz single-phase waveform as needed to synthesize three waveforms of appropriate lower frequency applied to three phase windings of motor. Electric actuation systems using technology currently being built to peak powers of 70 kW. Amplitude of voltage of effective machine-frequency waveform determined by momentary frequency of pulses, while machine frequency determined by rate of repetition of overall temporal pattern of pulses. System enables independent control of both voltage and frequency.

  7. Adaptive Backstepping Control for Linear Induction Motor Drive Using FPGA

    Microsoft Academic Search

    Faa-Jeng Lin; Li-Tao Teng; Chih-Kai Chang

    2006-01-01

    An adaptive backstepping controller is proposed to control the mover position of a linear induction motor (LIM) drive to compensate the uncertainties including the friction force. First, the dynamic model of an indirect field-oriented LIM drive is derived. Next, a backstepping approach is designed to compensate the uncertainties occurred in the motion control system. Moreover, the uncertainties are lumped and

  8. Grey feedback linearization speed control for induction servo motor drive

    Microsoft Academic Search

    Rong-Jong Wai; Rou-Yong Duan; Li-Jung Chang

    2001-01-01

    This study mainly focuses on the development of an uncertainty predictor based on the grey theory as a possible solution to improve the shortcoming of the traditional feedback linearization control scheme. Moreover, the newly designed grey feedback linearization control system is implemented for an indirect field-oriented induction servo motor drive to track periodic speed commands. In the proposed control system,

  9. Discontinuous SVPWM Techniques for Double Star Induction Motor Drive Control

    Microsoft Academic Search

    Khoudir Marouani; Lotfi Baghli; Djafar Hadiouche; Abdelaziz Kheloui; Abderrezak Rezzoug

    2006-01-01

    In this paper, we present SVPWM control techniques suitable for a double-star induction motor drive (DSIM). The induction machine has two sets of three-phase stator windings spatially shifted by 30 electrical degrees. Each set of three-phase stator windings is fed by a three-phase inverter. Continuous and discontinuous space vector PWM techniques are presented. Implementation on a DSP controller board is

  10. Implementation of a new fuzzy vector control of induction motor.

    PubMed

    Rafa, Souad; Larabi, Abdelkader; Barazane, Linda; Manceur, Malik; Essounbouli, Najib; Hamzaoui, Abdelaziz

    2014-05-01

    The aim of this paper is to present a new approach to control an induction motor using type-1 fuzzy logic. The induction motor has a nonlinear model, uncertain and strongly coupled. The vector control technique, which is based on the inverse model of the induction motors, solves the coupling problem. Unfortunately, in practice this is not checked because of model uncertainties. Indeed, the presence of the uncertainties led us to use human expertise such as the fuzzy logic techniques. In order to maintain the decoupling and to overcome the problem of the sensitivity to the parametric variations, the field-oriented control is replaced by a new block control. The simulation results show that the both control schemes provide in their basic configuration, comparable performances regarding the decoupling. However, the fuzzy vector control provides the insensitivity to the parametric variations compared to the classical one. The fuzzy vector control scheme is successfully implemented in real-time using a digital signal processor board dSPACE 1104. The efficiency of this technique is verified as well as experimentally at different dynamic operating conditions such as sudden loads change, parameter variations, speed changes, etc. The fuzzy vector control is found to be a best control for application in an induction motor. PMID:24629620

  11. Direct torque control of induction motor-variable switching sectors

    Microsoft Academic Search

    C. G. Mei; S. K. Panda; J. X. Xu; K. W. Lim

    1999-01-01

    An induction motor drive based on direct torque control (DTC) allows high dynamic performance to be obtained with a very simple hysteresis control scheme. In this paper, the problem of stator flux drooping at low speeds has been investigated. By rotating the original flux sectors defined for conventional DTC near the sector boundaries, it is possible to maintain stator flux

  12. Fault tolerant vector control of induction motor drive

    NASA Astrophysics Data System (ADS)

    Odnokopylov, G.; Bragin, A.

    2014-10-01

    For electric composed of technical objects hazardous industries, such as nuclear, military, chemical, etc. an urgent task is to increase their resiliency and survivability. The construction principle of vector control system fault-tolerant asynchronous electric. Displaying recovery efficiency three-phase induction motor drive in emergency mode using two-phase vector control system. The process of formation of a simulation model of the asynchronous electric unbalance in emergency mode. When modeling used coordinate transformation, providing emergency operation electric unbalance work. The results of modeling transient phase loss motor stator. During a power failure phase induction motor cannot save circular rotating field in the air gap of the motor and ensure the restoration of its efficiency at rated torque and speed.

  13. Adaptive Fuzzy Controller for Efficiency Optimization of Induction Motors

    Microsoft Academic Search

    Durval de Almeida Souza; W. C. P. de Aragao Filho; G. C. D. Sousa

    2007-01-01

    This paper introduces a new technique for efficiency optimization of adjustable-speed drives, with an emphasis on vector-controlled induction motor drives. The technique combines two distinct control methods, namely, online search of the optimal operating point and a model-based efficiency control. For a given operating condition, which is characterized by a given speed and load torque, a search controller (SC); based

  14. A single current sensor control technique for induction motors

    Microsoft Academic Search

    Chunpeng Zhang; Fei Lin

    2002-01-01

    This paper describes a single current sensor control technique for induction motors that uses only a single DC-link current sensing resistor to obtain the information of three line currents. The principal motivation is to reduce the cost, and improve the reliability of a drive system. However, in certain conditions, the measurement is distorted due to the too narrow current pulse

  15. Rotor Chopper Control for Induction Motor Drive: TRC Strategy

    Microsoft Academic Search

    Paresh C. Sen; K. H. J. Ma

    1975-01-01

    A solid-state induction motor speed regulating scheme using a rotor chopper-controlled external resistor is investigated. This control scheme provides continuous and contactless variation of rotor resistance and thereby eliminates the undesirable features of the conventional rotor resistance control method. A thorough analysis of the steady-state performance of the system is presented. Both dc and ac circuit models are derived to

  16. Nonlinear servo control of an induction motor with saturation

    SciTech Connect

    Bodson, M. [Univ. of Utah, Salt Lake City, UT (United States); Chiasson, J.; Novotnak, R. [Univ. of Pittsburgh, PA (United States)

    1994-12-31

    This work is an extension of the authors` previous work on high-performance induction motor control in which the magnetic model of the motor was assumed to be linear. Saturation of the iron in the main path of the induction machine is taken into account. The saturation is modeled in the dq coordinate frame and the model is then used to design an input-output linearization controller to provide independent (decoupled) control of the speed and flux. With this controller, the flux reference becomes an extra degree of freedom for the designer to help achieve performance objectives. Taking into account saturation, the flux reference is chosen to achieve the optimal torque (maximum for acceleration & minimum for deceleration) at any given speed. The input-output controller is used to provide tracking of a given position & speed trajectory while simultaneously tracking the optimal flux reference. Experimental results are given to validate the approach.

  17. Independent Control of Two Induction Motors Fed by a Five Legs PWM Inverter for Electric Vehicles

    E-print Network

    Boyer, Edmond

    . NOMENCLATURE EV = Electric vehicle; IM = Induction motor; IFOC = Indirect field oriented control; PWM= PulseIndependent Control of Two Induction Motors Fed by a Five Legs PWM Inverter for Electric Vehicles B in the indirect field oriented control algoritm. Experiments and simulation are carried-out, on an induction motor

  18. Networked based control and supervision of induction motor using OPC server and PLC

    Microsoft Academic Search

    Jasmin Velagic; Admir Kaknjo; Nedim Osmic; Tarik Dzananovic

    2011-01-01

    This paper presents the control of induction motor via PROFINET network including a remote control using the OPC (OLE for Process Control) standard. This system is composed of induction motor, encoder, frequency converter, PLC (Programmable Logic Controller) and two PCs (server and client). The motor control is PLC based with PID (Proportional-Integral-Derivative) controller, while PCs are used as HMI (Human

  19. Design and Control of the Induction Motor Propulsion of an Electric Vehicle

    E-print Network

    Brest, Université de

    Design and Control of the Induction Motor Propulsion of an Electric Vehicle B. Tabbache1,2 , A for presizing the induction motor propulsion of an Electric Vehicle (EV). Based on the EV desired performances for different induction motor-based EVs using a siding mode control technique. Index Terms--Electric Vehicle (EV

  20. A loss-minimization scheme for direct thrust-controlled linear induction motor drives

    Microsoft Academic Search

    Ke Wang; Liming Shi; Yaohua Li

    2008-01-01

    Due to the existence of end-effects and large mechanic clearance, the parameters of linear induction motor (LIM) are variable and the efficiency is lower than that of rotary induction motor (RIM). This paper proposes a strategy to minimize the losses for direct thrust-controlled linear induction motor drives. The proposed strategy, which is based on a novel search algorithm, chooses primary

  1. SDTC-EKF Control of an Induction Motor Based Electric Vehicle B. Tabbache1,2

    E-print Network

    Paris-Sud XI, Université de

    SDTC-EKF Control of an Induction Motor Based Electric Vehicle B. Tabbache1,2 , A. Kheloui2 , M torque control of an induction motor based electric vehicle. In this case, stator flux and rotational, comprising the electric motor, power converter, and electronic controller, is the core of the EV propulsion

  2. Feedback Linearization Control of Inverter Fed Induction Motor - with Sliding Mode Speed and Flux Observers

    Microsoft Academic Search

    Dariusz Sobczuk; Mariusz Malinowski

    2006-01-01

    This paper presents a feedback linearization approach for high performance induction motor control. Some oscillograms illustrating the properties of the PWM inverter-fed induction motor with control via feedback linearization are presented. The sliding mode observer is used to estimate the rotor flux and the angular speed of the motor

  3. Control of induction motors via feedback linearization with input-output decoupling

    Microsoft Academic Search

    DONG-IL KIM; IN-JOONG HA; MYOUNG-SAM KO

    1990-01-01

    In induction motor control, power efficiency is an important factor to be considered. We attempt to achieve both high dynamic performance and maximum power efficiency by means of linear decoupling of rotor speed (or motor torque) and rotor flux. The induction motor with our controller possesses the input-output dynamic characteristics of a linear system such that the rotor speed (or

  4. Five-phase induction motor drives with DSP-based control system

    Microsoft Academic Search

    Huangsheng Xu; Hamid A. Toliyat; Lynn J. Petersen

    2002-01-01

    This paper introduces two kinds of control schemes: vector control and direct torque control (DTC). These control schemes can be extensively applied to the operation of a five-phase induction motor using a fully digital implementation. Vector control of the five-phase induction motor not only achieves high drive performance, but also generates the desired nearly rectangular current waveforms and flux profile

  5. Neural and Fuzzy Adaptive Control of Induction Motor Drives

    SciTech Connect

    Bensalem, Y. [Research Unit of Modelisation, Analyse, Command of Systems MACS (Tunisia); Sbita, L.; Abdelkrim, M. N. [6029 Universite High School of Engineering-Gabes-Tunisia (Tunisia)

    2008-06-12

    This paper proposes an adaptive neural network speed control scheme for an induction motor (IM) drive. The proposed scheme consists of an adaptive neural network identifier (ANNI) and an adaptive neural network controller (ANNC). For learning the quoted neural networks, a back propagation algorithm was used to automatically adjust the weights of the ANNI and ANNC in order to minimize the performance functions. Here, the ANNI can quickly estimate the plant parameters and the ANNC is used to provide on-line identification of the command and to produce a control force, such that the motor speed can accurately track the reference command. By combining artificial neural network techniques with fuzzy logic concept, a neural and fuzzy adaptive control scheme is developed. Fuzzy logic was used for the adaptation of the neural controller to improve the robustness of the generated command. The developed method is robust to load torque disturbance and the speed target variations when it ensures precise trajectory tracking with the prescribed dynamics. The algorithm was verified by simulation and the results obtained demonstrate the effectiveness of the IM designed controller.

  6. Forward and reverse control system for induction motors

    DOEpatents

    Wright, J.T.

    1987-09-15

    A control system for controlling the direction of rotation of a rotor of an induction motor includes an array of five triacs with one of the triacs applying a current of fixed phase to the windings of the rotor and four of the triacs being switchable to apply either hot ac current or return ac current to the stator windings so as to reverse the phase of current in the stator relative to that of the rotor and thereby reverse the direction of rotation of the rotor. Switching current phase in the stator is accomplished by operating the gates of pairs of the triacs so as to connect either hot ac current or return ac current to the input winding of the stator. 1 fig.

  7. Variable-frequency inverter controls torque, speed, and braking in ac induction motors

    NASA Technical Reports Server (NTRS)

    Nola, F. J.

    1974-01-01

    Dc to ac inverter provides optimum frequency and voltage to ac induction motor, in response to different motor-load and speed requirements. Inverter varies slip frequency of motor in proportion to required torque. Inverter protects motor from high current surges, controls negative slip to apply braking, and returns energy stored in momentum of load to dc power source.

  8. Development and Control of a Three DOF Spherical Induction Motor Masaaki Kumagai and Ralph L. Hollis

    E-print Network

    . A spherical stepper motor [5] can perform absolute rotation control although it requires complex spatialDevelopment and Control of a Three DOF Spherical Induction Motor Masaaki Kumagai and Ralph L) operating with closed loop control. The motor can produce up to 4 Nm of torque along arbitrary axes

  9. Hybrid controller using fuzzy neural networks for identification and control of induction servo motor drive

    Microsoft Academic Search

    Rong-jong Wai; Hsin-hai Lin; Faa-jeng Lin

    2000-01-01

    An induction servo motor drive with a hybrid controller, which combines the advantages of the integral-proportional (IP) position controller and the fuzzy neural network controller (FNNC), is introduced in this study. First, the IP position controller is designed according to the estimated plant model to match the time-domain command tracking specifications. Then, a compensated signal generated from FNNC is augmented

  10. Real Time Implementation of Adaptive PI Controller by Fuzzy Inference for Induction Motor Speed Control

    Microsoft Academic Search

    A. Hazzabl; M. Zerbo; I. K. Bousserhane; P. Sicard

    2006-01-01

    Control of an induction motor using fuzzy gain adaptation of PI controller (adaptive FLC-PI) is presented. Fuzzy rules are utilized on-line to determine the controller parameters based on tracking error and its first time derivative. Simulation and experimental results of the proposed scheme show good performances compared to the PI controller with fixed parameters

  11. Need for industry standards for AC induction motors intended for use with adjustable frequency controllers

    Microsoft Academic Search

    R. H. Daugherty; C. H. Wennerstrom

    1990-01-01

    With the increased use and variety of A-C induction motors on adjustable frequency controls, there is a need to develop industry standards to provide the guidance necessary for the proper selection of the motor which will function as intended with the control. These standards should establish requirements for both electrical and mechanical characteristics of the motor necessary to establish uniformity

  12. Fundamental characteristics of molten metal flow control by linear induction motor

    Microsoft Academic Search

    Keisuke Fujisaki; Jun-ichi Nakagawa; Hideyuki Misumi

    1994-01-01

    Molten metal flow control using linear induction motor is expected much to be a new revolutionary basic technology to realize high quality and low cost processes. We report an experiment with fused metal (melting point: 45°C) and 100 kg molten steel. According to the fused metal experiment, the linear induction motor has a good ability for stopping and acceleration as

  13. Application of artificial neural network in the efficient control of three-phase induction motor

    Microsoft Academic Search

    Arineu F. Santos; Francisco A. S. Neves; Ronaldo R. B. Aquino; Marcelo C. Cavalcanti

    2009-01-01

    This work presents a method for increasing the efficiency of three-phase induction motor drives over the entire operation range. The direct field oriented control of induction motors, including the effects of magnetic saturation is used. The magnetic saturation effect in the machine is modeled by the non-linear magnetization curve of the iron core. Artificial neural networks are used to predict

  14. Simulation of FOC Vector Control of Induction Motor Based on LabVIEW

    Microsoft Academic Search

    Tao Wu; Yi-Lin Chi; Yu Guo; Chao Xu

    2009-01-01

    Based on the theory of vector control of the induction motor, a new method for modeling and simulation of induction motor field orientation based on LabVIEW is proposed. This paper discusses the calculation of the flux position, the realization of the SVPWM, the equivalent transformation. The reasonability and validity are verified by the simulation and experimentation. This method offers a

  15. Sensitivity and conditioning issues in speed sensorless control of induction motors

    Microsoft Academic Search

    M. Velez-Reyes; R. Castro-Anaya

    1998-01-01

    This paper addresses sensitivity and conditioning issues associated with the problem of estimating the rotor speed and electric parameters of an induction motor based on measurements of stator voltages and currents, and their potential implication in the sensorless control of induction motors. The authors show that for ill-conditioned speed and parameter estimation problems, subset selection techniques can be used to

  16. Intelligent control of induction servo motor drive via wavelet neural network

    Microsoft Academic Search

    Rong-Jong Wai; Jia-Ming Chang

    2002-01-01

    This study presents an intelligent control system for an induction servo motor drive to track periodic commands using a wavelet neural network (WNN). With the field orientation mechanism, the dynamic behavior of the induction servo motor drive system is rather similar to a linear system. However, the uncertainties, such as mechanical parametric variation, external disturbance, unstructured uncertainty due to nonideal

  17. Intelligent control of the regenerative braking in an induction motor drive

    Microsoft Academic Search

    S. Cholula; A. Claudio; J. Ruiz

    2005-01-01

    This work deal with the problem related to the energy recovered in an induction motor drive. During deceleration, a regenerative braking control strategy allows the recovery of the mechanical energy stored in an inertial mass. This process involves the conversion of the kinetic energy into electric energy. The parts that compose the system are a squirrel cage induction motor variable

  18. Sensor Fault-Tolerant Control of an Induction Motor Based Electric Vehicle Bekhera Tabbache1,2

    E-print Network

    Paris-Sud XI, Université de

    Sensor Fault-Tolerant Control of an Induction Motor Based Electric Vehicle Bekheïra Tabbache1://www.lbms.fr Keywords Electric Vehicle (EV), Induction motor, Sensor fault, Fault-tolerant control (FTC), Direct torque a reconfigurable direct torque control of an induction motor-based electric vehicle. The proposed strategy concerns

  19. Multimicroprocessor-based robust control of an AC induction servo motor

    Microsoft Academic Search

    Y.-Y. Tzou; H.-J. Wu

    1990-01-01

    A multiloop feedback control system supplemented by a complementary controller is used to improve the drive performance of an AC induction servo motor and reduce sensitivity to parameter variations, nonlinear effects, and load disturbances. Based on the principle of field-oriented vector control, a software-based current-decoupled controller has been proposed. A simplified model of the current-decoupled induction motor has been used

  20. Fuzzy Soft-Switching Law of an Adaptive Sliding Mode Controller for Induction Motor Speed Control

    Microsoft Academic Search

    A. Hazzabl; I. K. Bousserhane; P. Sicard

    2006-01-01

    An adaptive fuzzy sliding mode control based on soft-switching law is defined to control the speed of an induction motor. A sliding-mode control (SMC) system with proportional plus integral control action that generates an equivalent control action is investigated. A simple adaptive algorithm is utilized to generate soft-switching parameters of the equivalent control action, resulting into a fuzzy sliding mode

  1. Thyristor controlled AC induction motors using a discrete frequency control method

    Microsoft Academic Search

    Antonio Ginart; John S. Camilleri; Gaston Pesse

    1997-01-01

    The AC thyristor controllers have been traditionally used for starting induction motors to reduce the current. In this work it is proposed that the utilization of the AC thyristor controllers be used like inverters by increasing the frequency in discrete steps until the line frequency is reached. These discrete steps are sub-multiples of the line frequency. They are generated by

  2. Inductance model-based sensorless control of the switched reluctance motor drive at low speed

    Microsoft Academic Search

    Hongwei Gao; Farzad Rajaei Salmasi; Mehrdad Ehsani

    2004-01-01

    A sensorless control scheme for the switched reluctance motor (SRM) drive at low speed is presented in this paper. The incremental inductance of each active phase is estimated using the terminal measurement of this phase. The estimated phase incremental inductance is compared to an analytical model, which represents the functional relationships between the phase incremental inductance, phase current, and rotor

  3. Variable frequency inverter for ac induction motors with torque, speed and braking control

    NASA Technical Reports Server (NTRS)

    Nola, F. J. (inventor)

    1975-01-01

    A variable frequency inverter was designed for driving an ac induction motor which varies the frequency and voltage to the motor windings in response to varying torque requirements for the motor so that the applied voltage amplitude and frequency are of optimal value for any motor load and speed requirement. The slip frequency of the motor is caused to vary proportionally to the torque and feedback is provided so that the most efficient operating voltage is applied to the motor. Winding current surge is limited and a controlled negative slip causes motor braking and return of load energy to a dc power source.

  4. Neural network speed controller of induction motor drive based on direct MRAC method

    Microsoft Academic Search

    Xianglong Jiang; Jin Zhao; Hui Luo; Shanmei Cheng; Shuyun Wan

    2003-01-01

    A novel neural network speed controller (NNSC) of induction motor drive is presented, which is on-line trained by a dynamic BP algorithm based on direct model reference adaptive control (MRAC) method. In particular, a new error function is used for the dynamic BP algorithm, which can adjust the parameters of NNSC and minimize the error between motor speed and the

  5. Equilibrium analysis of voltage-fed field oriented controlled induction motors

    Microsoft Academic Search

    Rubén Salas-cabrera; Claudio A. Cañizares

    2004-01-01

    This work presents an analysis of the equilibrium points of the induction motor when field oriented voltage control is used. Thus, a study of the steady state of the motor and controller dynamics is carried out for two cases. In the first one, all of the parameters are constant and known. In the second case, the rotor resistance is considered

  6. A Low Cost Induction Motor Controller for Light Electric Vehicles in Local Areas

    Microsoft Academic Search

    Rui Esteves Araújo; Henrique Teixeira; José Barbosa; Vicente Leite

    2005-01-01

    This paper is concerned with design considerations and tradeoffs involved in the power electronics development for light electric vehicles. A review of propulsion system design, power conversion structure and control is presented. A three-phase squirrel-cage induction motor is used as propulsion system for an electric scooter. The motor is controlled at different operating conditions by means of a simple scalar

  7. A VSS speed controller with model reference response for induction motor drive

    Microsoft Academic Search

    Chang-Ming Liaw; Yeong-May Lin; Kuei-Hsiang Chao

    2001-01-01

    This paper is mainly concerned with the development of a variable-structure system (VSS) controller with model reference speed response for an induction motor drive. An indirect-field-oriented (IFO) induction motor drive is first implemented, and its dynamic model at a nominal operating condition is estimated from measured data. Then, a two-degrees-of-freedom linear model-following controller (2DOFLMFC) is designed to meet the prescribed

  8. Adaptative Variable Structure Control for an Online Tuning Direct Vector Controlled Induction Motor Drives

    NASA Astrophysics Data System (ADS)

    Lasaad, Sbita; Dalila, Zaltni; Naceurq, Abdelkrim Mohamed

    This study demonstrates that high performance speed control can be obtained by using an adaptative sliding mode control method for a direct vector controlled Squirrel Cage Induction Motor (SCIM). In this study a new method of designing a simple and effective adaptative sliding mode rotational speed control law is developed. The design includes an accurate sliding mode flux observation from the measured stator terminals and rotor speed. The performance of the Direct Field-Orientation Control (DFOC) is ensured by online tuning based on a Model Reference Adaptative System (MRAS) rotor time constant estimator. The control strategy is derived in the sense of Lyapunov stability theory so that the stable tracking performance can be guaranteed under the occurrence of system uncertainties and external disturbances. The proposed scheme is a solution for a robust and high performance induction motor servo drives. Simulation results are provided to validate the effectiveness and robustness of the developed methodology.

  9. A New Stabilizing Control Method for suppressing Oscillations of V\\/Hz Controlled PWM Inverter-fed Induction Motors Drives

    Microsoft Academic Search

    Zhiwen Ma; Fei Lin; T. Q. Zheng

    2006-01-01

    Undesirable sustained oscillations in V\\/Hz controlled PWM inverter-fed induction motor drives are often suffered under light load and in the low frequency region. These oscillation states vary with motor parameters, the inverter parameters and the operating conditions. In this paper, we propose a new stabilizing control method which is effective and simple for suppressing oscillations of V\\/Hz controlled induction motor

  10. Vector control of induction motor without shaft encoder

    Microsoft Academic Search

    Tsugutoshi Ohtani; Noriyuki Takada; Koji Tanaka

    1992-01-01

    A method of introduction motor drive that requires no shaft encoder is presented. This system has both torque and speed controls that are performed by vector control. The vector-control scheme is based on a rotor-flux speed control, which is performed by torque-producing current and rotor flux, derived from the stator voltages and currents. If it is possible to obtain both

  11. Adaptive fuzzy-neural-network control for induction spindle motor drive

    Microsoft Academic Search

    Faa-Jeng Lin; Rong-Jong Wai

    2002-01-01

    An induction spindle motor drive using synchronous pulse-width modulation (PWM) and dead-time compensatory techniques with an adaptive fuzzy-neural-network controller (AFNNC) is proposed in this study for advanced spindle motor applications. First, the operating principles of a new synchronous PWM technique and the circuit of dead-time compensator are described in detail. Then, since the control characteristics and motor parameters for high-speed-operated

  12. Adaptive speed control of AC servo induction motors with on-line load estimation

    Microsoft Academic Search

    Yee-Ping Yang; Chuan-Feng Fang

    1994-01-01

    An adaptive speed control with load torque compensation for AC servo induction motors is proposed. This adaptive control loop that precedes the field oriented control loop consists of a proportional plus integral (PI) controller and a load torque compensator. Their control gains are adjusted adaptively in terms of estimated parameters of an estimation model. The estimation model is a simple

  13. Induction Motor Control Scheme for Battery-Powered Electric Car (GM-Electrovair I)

    Microsoft Academic Search

    Jalal T. Salihi; Paul D. Agarwal; George J. Spix

    1967-01-01

    Several experimental vehicles have been built by the General Motors Corporation to investigate the technical feasibility of a battery-powered electric car using a variable speed induction motor. This paper describes the control scheme for the first experimental car¿Electrovair I.

  14. Speed control of a three-phase induction motor based on robust optimal preview control theory

    Microsoft Academic Search

    Mohamed M. M. Negm; Jamil M. Bakhashwain; M. H. Shwehdi

    2006-01-01

    A synthesized method for speed control of a three-phase induction motor (IM) based on optimal preview control system theory is implemented in this article. An IM model comprises three-input variables and three-output variables that coincide with the synchronous reference frame that is implemented using the vector method. The input variables of this model are the stator angular frequency and the

  15. An Improved Fault-Tolerant Control Scheme for PWM Inverter-Fed Induction Motor-Based EVs

    E-print Network

    Paris-Sud XI, Université de

    for such systems. In particular, voltage source inverters are a key component of these electric motor drive systemsAn Improved Fault-Tolerant Control Scheme for PWM Inverter-Fed Induction Motor-Based EVs Bekheïra--This paper proposes an improved fault-tolerant control scheme for PWM inverter-fed induction motor

  16. Emotional Learning Based Intelligent Controllers for Rotor Flux Oriented Control of Induction Motor

    NASA Astrophysics Data System (ADS)

    Abdollahi, Rohollah; Farhangi, Reza; Yarahmadi, Ali

    2014-08-01

    This paper presents design and evaluation of a novel approach based on emotional learning to improve the speed control system of rotor flux oriented control of induction motor. The controller includes a neuro-fuzzy system with speed error and its derivative as inputs. A fuzzy critic evaluates the present situation, and provides the emotional signal (stress). The controller modifies its characteristics so that the critics stress is reduced. The comparative simulation results show that the proposed controller is more robust and hence found to be a suitable replacement of the conventional PI controller for the high performance industrial drive applications.

  17. Study on an Application of Induction Motor Speed Sensorless Vector Control to Railway Vehicle Traction

    NASA Astrophysics Data System (ADS)

    Kondo, Keiichiro; Yuki, Kazuaki

    The Pulse Generators or PGs are equipped to detect the rotor frequency of induction traction motors for the torque control in railway vehicle traction field. Eliminating PGs are preferable from the view points of increasing the reliability of the traction system, reduction of the both initial and maintenance cost and down-sizing induction traction motors. Expecting those merits, we have been studying to apply a sensor less control method to induction traction motor control. Prior to some reports of studies and tests to apply speed sensor-less strategy to railway vehicle traction, we lunched the ideas to apply the speed sensor-less control strategy and results of the studies and the tests. In this paper, we present the novel control method for railway vehicle traction and some results of theoretical study and tests.

  18. Implementation of damped-oscillation crane control for existing ac induction motor-driven cranes

    Microsoft Academic Search

    M. W. Noakes; R. L. Kress; G. T. Appleton

    1993-01-01

    The Oak Ridge National Laboratory (ORNL) has implemented damped-oscillation crane control on one of its existing ac induction motor-driven facility overhead cranes. The purpose of this engineering grade test has been to determine feasibility, determine control and interfacing specifications, and establish the capability of newly available ac motor-control hardware. A flux vector inverter drive is used in the initial demonstration

  19. A 150kVA vector-controlled matrix converter induction motor drive

    Microsoft Academic Search

    Thomas F. Podlesak; Dimosthenis C. Katsis; Patrick W. Wheeler; Jon C. Clare; Lee Empringham; Michael Bland

    2005-01-01

    This paper describes the design, construction, and testing of a 150-kVA closed-loop vector-controlled matrix converter induction motor drive. The primary objective of this research effort is to evaluate the utility of the matrix converter in electric vehicle applications, primarily for motor control. A prototype converter has been built using 600-A 1400-V insulated gate bipolar transistors. Closed-loop vector control has been

  20. Variable-Speed Induction Motor Drives for Aircraft Environmental Control Compressors

    NASA Technical Reports Server (NTRS)

    Mildice, J. W.; Hansen, I. G.; Schreiner, K. E.; Roth, M. E.

    1996-01-01

    New, more-efficient designs for aircraft jet engines are not capable of supplying the large quantities of bleed air necessary to provide pressurization and air conditioning for the environmental control systems (ECS) of the next generation of large passenger aircraft. System analysis and engineering have determined that electrically-driven ECS can help to maintain the improved fuel efficiencies; and electronic controllers and induction motors are now being developed in a NASA/NPD SBIR Program to drive both types of ECS compressors. Previous variable-speed induction motor/controller system developments and publications have primarily focused on field-oriented control, with large transient reserve power, for maximum acceleration and optimum response in actuator and robotics systems. The application area addressed herein is characterized by slowly-changing inputs and outputs, small reserve power capability for acceleration, and optimization for maximum efficiency. This paper therefore focuses on the differences between this case and the optimum response case, and shows the development of this new motor/controller approach. It starts with the creation of a new set of controller requirements. In response to those requirements, new control algorithms are being developed and implemented in an embedded computer, which is integrated into the motor controller closed loop. Buffered logic outputs are used to drive the power switches in a resonant-technology, power processor/motor-controller, at switching/resonant frequencies high enough to support efficient high-frequency induction motor operation at speeds up to 50,000-RPA

  1. Chattering Reduction and Robust Position Control in Induction Motor with Second-order VSS

    Microsoft Academic Search

    G. Bartolini; M. Marchesoni; P. Pisu; Elio Usai

    1998-01-01

    A new sliding-mode controller for position control of induction motor which provides chattering elimination is presented. The simplicity of the control algorithm makes it easy to implement. Moreover, a new sliding-mode observer is proposed to overcome the problem of the rotor resistance estimation, and it is robust against parameter variations.

  2. Indirect field-oriented control of induction motors is robustly globally stable

    Microsoft Academic Search

    Paul A. S. De Wit; Romeo Ortega; Iven Mareelst

    1996-01-01

    Field orientation, in one of its many forms, is an established control method for high dynamic performance AC drives. In particular, for induction motors, indirect fieldoriented control is a simple and highly reliable scheme which has become the de facto industry standard. In spite of its widespread popularity no rigorous stability proof for this controller was available in the literature.

  3. Voltage control of emerging distribution systems with induction motor loads using robust LQG approach

    E-print Network

    Pota, Himanshu Roy

    facilities. The integration of DG in these passive networks can affect the dynamic behavior of the systemVoltage control of emerging distribution systems with induction motor loads using robust LQG controller is designed to damp this voltage mode of the system. The controller is designed using the linear

  4. Indirect vector control of electric drives employing induction motor with forced dynamics

    Microsoft Academic Search

    Jan VITTEK; Juraj ALTUS; Jozef BUDAY; M. Rapsik

    2003-01-01

    The contribution presents an extension of indirect vector control of electric drives employing induction motors to 'forced dynamic control'. This control method offers an accurate realization of dynamic response profiles, which can be selected for given application by the user. The developed systems operate with shaft position encoder or shaft sensorless, when only the stator currents are measured, the applied

  5. Formal Derivation of Direct Torque Control for Induction Motors using the Singular Perturbation Method

    Microsoft Academic Search

    Z. Sorchini; P. T. Krein

    2005-01-01

    Direct torque control (DTC) is an induction motor control technique that has been successful because it explicitly considers the inverter stage and uses few machine parameters, while being more robust to parameter uncertainty than field oriented control (FOC). This paper presents a formal derivation of DTC based on the singular perturbation method (SPM). The derivation elaborates a link between DTC

  6. Stability Improvement of V\\/Hz Controlled PWM Inverter-fed Induction Motors Drives

    Microsoft Academic Search

    Zhiwen Ma; Trillion Zheng; Fei Lin

    2006-01-01

    Three-phase induction motor drive systems driven by V\\/Hz controlled PWM voltage source inverter, which have been widely used in the industrial applications, have often suffered undesirable sustained oscillations in the light loaded state and in the low frequency range. In this paper, we propose a new method which is effective and simple to improve the stability of V\\/Hz controlled induction

  7. Performance Comparison of Permanent Magnet Synchronous Motors and Controlled Induction Motors in Washing Machine Applications Using Sensorless Field Oriented Control

    Microsoft Academic Search

    Aengus Murray; Marco Palma; Ali Husain

    2008-01-01

    This paper describes two alternative variable speed motor drive systems for washing machine applications. Three phase induction motors with tachometer feedback and direct drive permanent magnet synchronous motors with hall sensor feedback are two drive systems commonly used in North American washers today. Appliance manufacturers are now evaluating sensorless drive systems because of the low reliability and high cost of

  8. Sensor and Sensorless Fault Tolerant Control for Induction Motors Using a Wavelet Index

    PubMed Central

    Gaeid, Khalaf Salloum; Ping, Hew Wooi; Khalid, Mustafa; Masaoud, Ammar

    2012-01-01

    Fault Tolerant Control (FTC) systems are crucial in industry to ensure safe and reliable operation, especially of motor drives. This paper proposes the use of multiple controllers for a FTC system of an induction motor drive, selected based on a switching mechanism. The system switches between sensor vector control, sensorless vector control, closed-loop voltage by frequency (V/f) control and open loop V/f control. Vector control offers high performance, while V/f is a simple, low cost strategy with high speed and satisfactory performance. The faults dealt with are speed sensor failures, stator winding open circuits, shorts and minimum voltage faults. In the event of compound faults, a protection unit halts motor operation. The faults are detected using a wavelet index. For the sensorless vector control, a novel Boosted Model Reference Adaptive System (BMRAS) to estimate the motor speed is presented, which reduces tuning time. Both simulation results and experimental results with an induction motor drive show the scheme to be a fast and effective one for fault detection, while the control methods transition smoothly and ensure the effectiveness of the FTC system. The system is also shown to be flexible, reverting rapidly back to the dominant controller if the motor returns to a healthy state. PMID:22666016

  9. Vector approximation method with parameter adaptation and torque control of CSI-fed induction motor

    Microsoft Academic Search

    Kozo Ide; Zhi-Guo Bai; Zi-Jiang Yang; Teruo Tsuji

    1995-01-01

    The concept of the vector approximation method for CSI-fed induction motors consists of vector control and the shaping of a stator current wave. Vector approximation means that a desirable space current vector is approximated by two realizable current vectors which have only six directions, and by DC link current control. The main purpose of the vector approximation method is not

  10. Vector approximation method with parameter adaptation and torque control of CSI-fed induction motor

    Microsoft Academic Search

    Kozo Ide; Zhi-Guo Bai; Zi-Jiang Yang; Teruo Tsuji

    1994-01-01

    The concept of a vector approximation method for a CSI-fed induction motor consists of the vector control and the shaping of a stator current wave. The vector approximation means that a desirable current space vector is approximated by two realizable current vectors which have only six directions, and by DC link current control. The main purpose of the vector approximation

  11. Study and simulation of space vector PWM control of double-star induction motors

    Microsoft Academic Search

    D. Hadiouche; H. Razik; A. Rezzoug

    2000-01-01

    This paper deals with a comparison between different structures of double-star induction motors (DSIMs), controlled by space vector PWM. The modelling of the DSIM is made using an arbitrary shift angle between the two three-phase windings. A new transformation matrix is proposed to develop a suitable dynamic model and to elaborate the space vector PWM control strategy for different values

  12. Partial state feedback control of induction motors with magnetic saturation: elimination of flux measurements

    Microsoft Academic Search

    A. Behal; M. Feemster; D. M. Dawson; A. Mangal

    2000-01-01

    We present a singularity-free, rotor position tracking controller for the full order, nonlinear dynamic model of the induction motor that includes the effects of magnetic saturation. By utilizing the ?-equivalent saturation model, we design an observer\\/controller strategy that achieves semi-global exponential rotor position tracking and only requires stator current, rotor velocity, and rotor position measurements

  13. Speed and position servo for induction motor using robust model reference adaptive control

    Microsoft Academic Search

    H. T. Camara; E. G. Carati; H. L. Hey; H. Pinheiro; J. R. Pinheiro; H. A. Grundling

    2002-01-01

    This paper presents a speed and a position servomechanism for induction motors (IM) based on a robust model reference adaptive control (RMRAC). The RMRAC control law is applied to the mechanical part of the plant to compensate disturbances and unmodeled dynamics. A coupling compensation method applied on stator currents, which are required to generate stator voltages Vds and Vqs, are

  14. Adaptive speed identification for vector control of induction motors without rotational transducers

    Microsoft Academic Search

    C. Schauder

    1992-01-01

    A model-reference adaptive system (MRAS) for the estimation of induction motor speed from measured terminal voltages and currents is described. The estimated speed is used as feedback in a vector control system, thus achieving moderate bandwidth speed control without the use of shaft-mounted transducers. This technique is less complex and more stable than previous MRAS tacholess drives. It has been

  15. High performance induction motor drive using fuzzy self-tuning hybrid fuzzy controller

    Microsoft Academic Search

    A. Saghafinia; H. Wooi Ping

    2010-01-01

    A fuzzy self-tuning hybrid fuzzy controller for indirect field oriented control (IFOC) induction motor drives will be presented in this paper. The developed hybrid fuzzy control law consists of proportional-integral (PI) control at steady state, PI-type fuzzy logic control (FLC) at transient state, a simple switching mechanism between steady and transient states, and fuzzy self-tuning for tuning of their coefficients

  16. Implementation of robust wavelet-neural-network sliding-mode control for induction servo motor drive

    Microsoft Academic Search

    Rong-Jong Wai; Jia-Ming Chang

    2003-01-01

    This paper presents the design and properties of a robust wavelet-neural-network sliding-mode control (RWSC) system for an indirect field-oriented induction servo motor drive to track periodic commands. First, a total sliding-mode control (TSC) system with an integral-operation-switching surface, which is insensitive to uncertainties in the whole control process, is introduced. In the TSC system the controlled system has a total

  17. PWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control

    E-print Network

    Paris-Sud XI, Université de

    -tolerant capabilities for such systems. In particular, voltage source inverters are a key component of these electric [2]. In the automotive context, the dependence of an electric vehicle on the variable-speed ac drivesPWM Inverter-Fed Induction Motor-Based Electrical Vehicles Fault-Tolerant Control Bekheïra Tabbache

  18. Sensorless field oriented control of induction motors considering main flux saturation effects on test signal injection

    Microsoft Academic Search

    C. Rudolph; T. Laczynski; B. Orlik

    2004-01-01

    The field oriented control of induction motor drives without a speed sensor requires the calculation of the flux vector and the speed by a model from stator voltages and currents. In the case of faulty estimation of the flux vector, e.g., due to incorrect model parameters, the stability of the system is at risk. Calculating an orientation error between the

  19. Induction motor drive with parameter identification using a new predictive current control strategy

    Microsoft Academic Search

    O. Niermeyer; D. Schroder

    1989-01-01

    The accuracy of the control of an induction motor drive using the principle of field orientation depends on the relation of the current-speed model parameters to the machine values. Correlating the precalculated stator current trajectory used for the online pulse pattern calculation and the measured real trajectory enables readjustment of the model parameters. Advantageously this parameter estimation is faster than

  20. A Novel Polygon Based 15Phase AC-DC Converter for Vector Controlled Induction Motor Drives

    Microsoft Academic Search

    Bhim Singh; G. Bhuvaneswari; Vipin Garg

    2007-01-01

    In this article, a new approach to improve power quality at AC mains in a vector controlled induction motor drive (VCIMD) is proposed. The novel multi-phase AC-DC converter, consisting of a reduced rating autotransformer, leading to savings in weight, size, and cost, results in reduction in harmonic current at AC mains. The resulting supply current is near sinusoidal in shape

  1. Standstill Parameter Identification of Vector-Controlled Induction Motors Using the Frequency Characteristics of Rotor Bars

    Microsoft Academic Search

    Young-Su Kwon; Jeong-Hum Lee; Sang-Ho Moon; Byung-Ki Kwon; Chang-Ho Choi; Jul-Ki Seok

    2009-01-01

    We propose a current injection-based estimator to identify accurately standstill induction motor (IM) parameters necessary for vector control. A mathematical model that faithfully represents the general deep bar effect is introduced. Then, two exciting signals with a different frequency are sequentially injected to track the parameters based on the frequency function of the rotor bar. The proposed methodology employs closed-loop

  2. A maximum torque per ampere control strategy for induction motor drives

    Microsoft Academic Search

    O. Wasynczuk; S. D. Sudhoff; K. A. Corzine; Jerry L. Tichenor; P. C. Krause; I. G. Hansen; L. M. Taylor

    1998-01-01

    In this paper, a new control strategy is proposed which is simple in structure and has the straightforward goal of minimizing the stator current amplitude for a given load torque. It is shown that the resulting induction motor efficiency is reasonably close to optimal and that the approach is insensitive to variations in rotor resistance. Although the torque response is

  3. Operational Amplifier based control circuit for single phase multiple PWM inverter for Induction Motor Drive Application

    Microsoft Academic Search

    Karuppanan P; Kamala Kanta Mahapatra

    2010-01-01

    This article explores the variable speed of a single phase induction motor by varying supply frequency with the help of Multiple Pulse Width Modulation based Inverter. In PWM voltage source inverter the variation of both voltages to frequency should be done simultaneously to keep their ratio constant. In this investigation a simple novel control circuit is adopted using OPAMP. The

  4. Deadbeat flux level control of high power saturated induction servo motor using rotor flux observer

    Microsoft Academic Search

    Kouki Matsuse; K. Kubota

    1991-01-01

    A concept of a deadbeat flux level control of high power saturated induction servomotor using rotor flux observer is presented. The fundamental characteristics of this proposed system have been investigated by simulation and experiment. It is confirmed that the motor efficiency can be improved without spoiling the dynamic performance

  5. FPGA-Based Adaptive Backstepping Sliding-Mode Control for Linear Induction Motor Drive

    Microsoft Academic Search

    Faa-Jeng Lin; Chih-Kai Chang; Po-Kai Huang

    2007-01-01

    A field-programmable gate array (FPGA)-based adaptive backstepping sliding-mode controller is proposed to control the mover position of a linear induction motor (LIM) drive to compensate for the uncertainties including the friction force. First, the dynamic model of an indirect field-oriented LIM drive is derived. Next, a backstepping sliding-mode approach is designed to compensate the uncertainties occurring in the motion control

  6. A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor

    Microsoft Academic Search

    Isao Takahashi; Toshihiko Noguchi

    1986-01-01

    New quick-response and high-efficiency control of an induction motor, which is quite different from that of the field-oriented control is proposed. The most obvious differences between the two are as follows. 1) The proposed scheme is based on limit cycle control of both flux and torque using optimum PWM output voltage; a switching table is employed for selecting the optimum

  7. Tracking performance of an H? position controller for current-fed induction motors under mechanical load variations

    Microsoft Academic Search

    Giuseppe Fusco

    2001-01-01

    This paper describes a systematic procedure to design a position tracking H? controller for current-fed induction motors actuating mechanical loads which ensures robustness with respect to load torque disturbances. This feature is very important in many industrial applications; in fact during normal operating conditions if variations of the mechanical load driven by the induction motor appear the tracking performance achievable

  8. A Simplified Self-Tuned Neuro-Fuzzy Controller Based Speed Control of an Induction Motor Drive

    Microsoft Academic Search

    M. Nasir Uddin; Z. Rui Huang; Muminul I. Chy

    2007-01-01

    In this paper a novel and simplified self-tuned neuro-fuzzy controller (NFC) is developed for speed control of an induction motor (IM) drive. The proposed NFC combines fuzzy logic and a four-layer artificial neural network (ANN) scheme. Based on the knowledge of motor control and intelligent algorithms an unsupervised self-tuning method is developed to adjust membership functions and weights of the

  9. Adaptive-speed identification scheme for a vector-controlled speed sensorless inverter-induction motor drive

    Microsoft Academic Search

    Geng Yang; Tung-Hai Chin

    1993-01-01

    The authors describe a model reference adaptive control system for speed control of the vector-controlled inverter induction motor drive without a speed sensor. The rotor speed is estimated with a full-order adaptive observer and is used as the feedback signal for the vector and speed controls. In order to estimate the speed accurately at low speeds, the motor stator resistance

  10. Adaptive decentralized control of robot manipulators driven by current-fed induction motors

    Microsoft Academic Search

    Su-Hau Hsu; Li-Chen Fu

    2005-01-01

    In this paper, an adaptive decentralized control scheme with a rotor-flux observer is proposed for the tracking control of robot manipulators actuated by current-fed induction motors. To cope with all parametric uncertainties in the electromechanical systems, an adaptive law is designed so that all the signals of closed-loop systems are bounded, and the tracking errors in position, velocity and rotor

  11. Review of direct torque control methods for voltage source inverter-fed induction motors

    Microsoft Academic Search

    Marian P. Kazmierkowski; Giuseppe Buja

    2003-01-01

    This paper presents a review of recently used direct torque and flux control (DTC) techniques for voltage source inverter-fed induction motors. A variety of techniques, different in concept, are described as follows: switching table (ST) based hysteresis DTC, direct self control (DSC), constant switching frequency DTC with space vector modulation (DTC-SVM). Trends in the DTC-SVM techniques based on neuro fuzzy

  12. Variable-speed induction motor drives for aircraft environmental control compressors

    Microsoft Academic Search

    J. W. Mildice; I. G. Hansen; K. E. Schreiner; M. E. Roth

    1996-01-01

    System analysis and engineering have determined that electrically-driven environmental control system (ECS) can help to maintain the improved fuel efficiencies; and electronic controllers and induction motors are now being developed in a NASA\\/MPD SBIR Program to drive both types of ECS compressors. An important operational requirement for these applications is variable speed\\/load operation; and total maximum power outputs are under

  13. Adaptive Control for Induction Servo Motor Based on Wavelet Neural Networks

    Microsoft Academic Search

    Qinghui Wu; Yi Liu; Dianjun Zhang; Yonghui Zhang

    2004-01-01

    \\u000a This paper presents an adaptive control system using wavelet neural networks (WNN) for an induction servo drive motor with\\u000a complex of non-linear, multivariable, strong coupling, slow time-varying properties, etc., and many uncertainties such as\\u000a mechanical parametric variation and external disturbance. The motivation of developing a new method is to overcome the limitation\\u000a of conventional control methods which depends on the

  14. Induction motor field-oriented controller, respecting iron losses

    Microsoft Academic Search

    Viktor Valouch

    1995-01-01

    A modified algorithm of the field oriented control respecting the stator iron losses of AC machines is presented. A simplified easy-to-realize version of this algorithm is suggested. The comparison of the classical field oriented control with the algorithm reported in both steady state and transient processes is carried out through the results of numerical simulations. By using the usual algorithms

  15. Deadbeat flux level control of direct field-oriented high horse power induction servo motor using adaptive rotor flux observer

    Microsoft Academic Search

    Kouki Matsuse; Y. Takokoro

    1993-01-01

    A flux level deadbeat control of direct field oriented high-power induction servo motor drives using an adaptive rotor flux observer is presented. In this system, an adaptive rotor flux observer of a full-order type is used not only to construct the direct field oriented controller but also to identify the stator and rotor resistances of the servo motor. The rotor

  16. A simple direct-torque neuro-fuzzy control of PWM-inverter-fed induction motor drive

    Microsoft Academic Search

    Pawel Z. Grabowski; Marian P. Kazmierkowski; Bimal K. Bose; Frede Blaabjerg

    2000-01-01

    In this paper, the concept and implementation of a new simple direct-torque neuro-fuzzy control (DTNFC) scheme for pulsewidth-modulation-inverter-fed induction motor drive are presented. An adaptive neuro-fuzzy inference system is applied to achieve high-performance decoupled flux and torque control. The theoretical principle and tuning procedure of this method are discussed. A 3 kW induction motor experimental system with digital signal processor

  17. Vector control of induction motors without shaft transducers

    Microsoft Academic Search

    A. Fratta; A. Vagati; F. Villata

    1988-01-01

    A field oriented control scheme is proposed, not requiring any shaft transducer. The flux-estimation problems in such conditions are considered. A suitable method is proposed and its theoretical limits are outlined. A prototype system has been implemented, on this basis, and the experimental results are given, confirming the practical feasibility for a wide field of applications.

  18. Method and apparatus for pulse width modulation control of an AC induction motor

    DOEpatents

    Geppert, Steven (Bloomfield Hills, MI); Slicker, James M. (Union Lake, MI)

    1984-01-01

    An inverter is connected between a source of DC power and a three-phase AC induction motor, and a micro-processor-based circuit controls the inverter using pulse width modulation techniques. In the disclosed method of pulse width modulation, both edges of each pulse of a carrier pulse train are equally modulated by a time proportional to sin .THETA., where .THETA. is the angular displacement of the pulse center at the motor stator frequency from a fixed reference point on the carrier waveform. The carrier waveform frequency is a multiple of the motor stator frequency. The modulated pulse train is then applied to each of the motor phase inputs with respective phase shifts of 120.degree. at the stator frequency. Switching control commands of electronic switches in the inverter are stored in a random access memory (RAM) and the locations of the RAM are successively read out in a cyclic manner, each bit of a given RAM location controlling a respective phase input of the motor. The DC power source preferably comprises rechargeable batteries and all but one of the electronic switches in the inverter can be disabled, the remaining electronic switch being part of a "flyback" DC-DC converter circuit for recharging the battery.

  19. Development of new training algorithms for neuro-wavelet systems on the robust control of induction servo motor drive

    Microsoft Academic Search

    Rong-Jong Wai

    2002-01-01

    A robust wavelet neural network control (RWNNC) system is proposed to control the rotor position of an induction servo motor drive in this paper. In the proposed RWNNC system, a wavelet neural network controller is the main tracking controller that is used to mimic a computed torque control law, and a robust controller is designed to recover the residual approximation

  20. Adaptive control schemes for improving dynamic performance of efficiency-optimized induction motor drives.

    PubMed

    Kumar, Navneet; Raj Chelliah, Thanga; Srivastava, S P

    2015-07-01

    Model Based Control (MBC) is one of the energy optimal controllers used in vector-controlled Induction Motor (IM) for controlling the excitation of motor in accordance with torque and speed. MBC offers energy conservation especially at part-load operation, but it creates ripples in torque and speed during load transition, leading to poor dynamic performance of the drive. This study investigates the opportunity for improving dynamic performance of a three-phase IM operating with MBC and proposes three control schemes: (i) MBC with a low pass filter (ii) torque producing current (iqs) injection in the output of speed controller (iii) Variable Structure Speed Controller (VSSC). The pre and post operation of MBC during load transition is also analyzed. The dynamic performance of a 1-hp, three-phase squirrel-cage IM with mine-hoist load diagram is tested. Test results are provided for the conventional field-oriented (constant flux) control and MBC (adjustable excitation) with proposed schemes. The effectiveness of proposed schemes is also illustrated for parametric variations. The test results and subsequent analysis confer that the motor dynamics improves significantly with all three proposed schemes in terms of overshoot/undershoot peak amplitude of torque and DC link power in addition to energy saving during load transitions. PMID:25820090

  1. Implementation of damped-oscillation crane control for existing ac induction motor-driven cranes

    SciTech Connect

    Noakes, M.W.; Kress, R.L. [Oak Ridge National Lab., TN (United States); Appleton, G.T. [Georgia Inst. of Tech., Atlanta, GA (United States). School of Electrical Engineering

    1993-04-01

    The Oak Ridge National Laboratory (ORNL) has implemented damped-oscillation crane control on one of its existing ac induction motor-driven facility overhead cranes. The purpose of this engineering grade test has been to determine feasibility, determine control and interfacing specifications, and establish the capability of newly available ac motor-control hardware. A flux vector inverter drive is used in the initial demonstration to investigate acceptability for swing-free crane control. Motor performance and restrictions are also examined. Control hardware design is based upon the Environmental Restoration and Waste Management (ER&WM) Robotics Technology Development Program (RTDP) standards. This includes the use of the VME bus and Motorola 680X0-based CPU boards for the hardware and UNIX and VxWorks for the software. However, smaller, cheaper, and more simple embedded controller design constraints are also considered in order to make the technology more attractive for general industrial use. Theoretical background, specific implementation, and recommendations are presented in this paper.

  2. Implementation of damped-oscillation crane control for existing ac induction motor-driven cranes

    SciTech Connect

    Noakes, M.W.; Kress, R.L. (Oak Ridge National Lab., TN (United States)); Appleton, G.T. (Georgia Inst. of Tech., Atlanta, GA (United States). School of Electrical Engineering)

    1993-01-01

    The Oak Ridge National Laboratory (ORNL) has implemented damped-oscillation crane control on one of its existing ac induction motor-driven facility overhead cranes. The purpose of this engineering grade test has been to determine feasibility, determine control and interfacing specifications, and establish the capability of newly available ac motor-control hardware. A flux vector inverter drive is used in the initial demonstration to investigate acceptability for swing-free crane control. Motor performance and restrictions are also examined. Control hardware design is based upon the Environmental Restoration and Waste Management (ER WM) Robotics Technology Development Program (RTDP) standards. This includes the use of the VME bus and Motorola 680X0-based CPU boards for the hardware and UNIX and VxWorks for the software. However, smaller, cheaper, and more simple embedded controller design constraints are also considered in order to make the technology more attractive for general industrial use. Theoretical background, specific implementation, and recommendations are presented in this paper.

  3. Variable speed control of single and two phase induction motors using a three phase voltage source inverter

    Microsoft Academic Search

    D. G. Holmes; A. Kotsopoulos

    1993-01-01

    The authors propose a method for using a standard three-phase voltage source inverter to achieve wide-range variable-speed control of a single-phase induction motor, by connecting the main and auxiliary windings of the motor across the bridge as an unbalanced three-phase load. The motor is analyzed as an unbalanced two-phase system to determine the torque that can be expected under variable

  4. Adaptive Sliding-Mode Neuro-Fuzzy Control of the Two-Mass Induction Motor Drive Without Mechanical Sensors

    Microsoft Academic Search

    Teresa Orlowska-Kowalska; Mateusz Dybkowski; Krzysztof Szabat

    2010-01-01

    In this paper, the concept of a model reference adaptive control of a sensorless induction motor (IM) drive with elastic joint is proposed. An adaptive speed controller uses fuzzy neural network equipped with an additional option for online tuning of its chosen parameters. A sliding-mode neuro-fuzzy controller is used as the speed controller, whose connective weights are trained online according

  5. DSP-based speed adaptive flux observer of induction motor

    Microsoft Academic Search

    Hisao Kubota; Kouki Matsuse; Takayoshi Nakano

    1991-01-01

    A method of estimating the speed of an induction motor is presented. This method is based on the adaptive control theory. Experimental results of a direct field oriented induction motor control without speed sensors are presented

  6. Deadbeat flux level control of direct-field-oriented high-horsepower induction servo motor using adaptive rotor flux observer

    Microsoft Academic Search

    Lipei Huang; Yasuki Tadokoro; Kouki Matsuse

    1994-01-01

    A method for the deadbeat flux level control of direct-field-oriented high-power induction servo motor drives has been developed that employs an adaptive rotor flux observer. The observer is a full-order type and is used not only in the direct-field-oriented controller, but also to determine the stator and rotor resistances of the servo motor. The observer reduces the sensitivity of a

  7. An efficiency optimization strategy of induction motors for electric vehicles

    Microsoft Academic Search

    Jiajia Wu; Dawei Gao; Xin Zhao; Qingchun Lu

    2008-01-01

    The electric vehicle needs the induction motor to run efficiently over the entire speed range, the dynamic torque response should also be good. Based on analyzing vector control and minimum losses control of induction motor, an efficiency optimization strategy of induction motors over wide speed range taking the dynamic torque response into account is presented in the issue. The strategy

  8. Fuzzy logic based on-line MRAC tuning of slip gain for an indirect vector-controlled induction motor drive

    Microsoft Academic Search

    G. C. D. Sousa; Bimal K. Bose; Kyung S. Kim

    1993-01-01

    Slip gain tuning of indirect vector controlled induction motor drive has been a subject of intense research interest in recent years. The paper proposes the fuzzy logic based online tuning of slip gain using the standard model reference adaptive control (MRAC) technique. MRAC methods based on reactive power and D-axis voltage are combined together with a weighting factor that is

  9. The photovoltaic pumping system using a variable speed single phase induction motor drive controlled by field oriented principle

    Microsoft Academic Search

    Varin Vongmanee

    2004-01-01

    The objective of this paper presents the photovoltaic (PV) water pumping system with a maximum power point tracking (MPPT). The water pumping system uses a variable speed single phase induction motor (SPIM) driven by a centrifugal pump by a field oriented control (FOC) inverter. The system under study consists of two sections. First, the MPPT using a DC-DC converter controlled

  10. Identification and control of induction motor stator currents using fast on-line random training of a neural network

    Microsoft Academic Search

    Bruce Burton; Farrukh Kamran; Ronald G. Harley; Thomas G. Habetler; Martin A. Brooke; Ravi Poddar

    1997-01-01

    Artificial neural networks (ANNs), which have no off-line pretraining, can be trained continually on-line to identify an inverter-fed induction motor and control its stator currents. Due to the small time constants of the motor circuits, the time to complete one training cycle has to be extremely small. This paper proposes and evaluates a new form of the random weight change

  11. Sensorless vector control of induction motors at very low speed using a nonlinear inverter model and parameter identification

    Microsoft Academic Search

    Joachim Holtz; Juntao Quan

    2002-01-01

    The performance of vector-controlled induction motor drives without a speed sensor is generally poor at very low speed. The reasons are offset and drift components in the acquired feedback signals, voltage distortions caused by the nonlinear behavior of the switching converter, and the increased sensitivity against model parameter mismatch. New modeling and identification techniques are proposed to overcome these problems.

  12. Improved sensorless vector control for induction motor drives fed by a matrix converter using nonlinear modeling and disturbance observer

    Microsoft Academic Search

    Kyo-Beum Lee; Frede Blaabjerg

    2006-01-01

    This paper presents a new sensorless vector control system for high performance induction motor drives fed by a matrix converter with nonlinearity compensation and disturbance observer. The nonlinear voltage distortion that is caused by commutation delay and on-state voltage drop in switching device is corrected by a new matrix converter modeling. The lumped disturbances such as parameter variation and load

  13. Sensored Field Oriented Control of a Robust Induction Motor Drive Using a Novel Boundary Layer Fuzzy Controller

    PubMed Central

    Saghafinia, Ali; Ping, Hew Wooi; Uddin, Mohammad Nasir

    2013-01-01

    Physical sensors have a key role in implementation of real-time vector control for an induction motor (IM) drive. This paper presents a novel boundary layer fuzzy controller (NBLFC) based on the boundary layer approach for speed control of an indirect field-oriented control (IFOC) of an induction motor (IM) drive using physical sensors. The boundary layer approach leads to a trade-off between control performances and chattering elimination. For the NBLFC, a fuzzy system is used to adjust the boundary layer thickness to improve the tracking performance and eliminate the chattering problem under small uncertainties. Also, to eliminate the chattering under the possibility of large uncertainties, the integral filter is proposed inside the variable boundary layer. In addition, the stability of the system is analyzed through the Lyapunov stability theorem. The proposed NBLFC based IM drive is implemented in real-time using digital signal processor (DSP) board TI TMS320F28335. The experimental and simulation results show the effectiveness of the proposed NBLFC based IM drive at different operating conditions.

  14. Optimal observer design for sensorless control of induction motor in regenerating-mode

    Microsoft Academic Search

    Nadia Bensiali; Claude Chaigne; Slim Tnani; Erik Etien; Gerard Champenois

    2006-01-01

    The simultaneous observation of rotor flux and angular speed in induction motor drive is subject to unstability problems, especially in regenerating mode. Many solutions have been proposed in the literature. In this article, an optimal observer design is proposed in order to reduce the unstability region to a simple line in the torque\\/speed plane

  15. Sensor-less speed control of an induction motor with no influence of secondary resistance variation

    Microsoft Academic Search

    Toshiyuki Kanmachi; I. Taahashi

    1993-01-01

    Calculation methods for the rotor and the secondary resistance of an induction motor are proposed. The first method is a rotor speed calculation method by which the exact speed can be computed directly. The method does not require information about the secondary resistance, which makes it free from the variation of the secondary resistance. The second method is a direct

  16. Analysis of field-oriented controlled induction motor drives under sensor faults and an overview of sensorless schemes.

    PubMed

    Arun Dominic, D; Chelliah, Thanga Raj

    2014-09-01

    To obtain high dynamic performance on induction motor drives (IMD), variable voltage and variable frequency operation has to be performed by measuring speed of rotation and stator currents through sensors and fed back them to the controllers. When the sensors are undergone a fault, the stability of control system, may be designed for an industrial process, is disturbed. This paper studies the negative effects on a 12.5 hp induction motor drives when the field oriented control system is subjected to sensor faults. To illustrate the importance of this study mine hoist load diagram is considered as shaft load of the tested machine. The methods to recover the system from sensor faults are discussed. In addition, the various speed sensorless schemes are reviewed comprehensively. PMID:24981890

  17. A sensorless stator flux oriented vector controlled induction motor drive with neuro-fuzzy based performance enhancement

    Microsoft Academic Search

    Bimal K. Bose; Nitin R. Patel

    1997-01-01

    A high-performance stator flux oriented speed sensorless direct vector-controlled induction motor drive is described in the paper. The drive can start from stand-still, operate at any speed in all the quadrants including the field-weakening region, and then stop at zero speed. The drive incorporated the following novel features: (1) software-programmable cascaded low-pass filter units permit machine terminal voltage integration to

  18. Power-quality improvements in vector-controlled induction motor drive employing pulse multiplication in AC-DC converters

    Microsoft Academic Search

    Bhim Singh; G. Bhuvaneswari; Vipin Garg

    2006-01-01

    This paper deals with the pulse doubling in a 12-pulse ac-dc converter for improving power quality in vector-controlled induction motor drives (VCIMDs). The design of proposed magnetics shows the flexibility in varying the voltage ratio of the autotransformer for making it suitable for retrofit applications, where presently a six-pulse diode bridge rectifier is being used. The proposed ac-dc converter is

  19. Application of pulse multiplication in autotransformer based AC-DC converters for direct torque control induction motor drives

    Microsoft Academic Search

    S. Nakhaee; A. Jalilian

    2010-01-01

    Power quality improvement has been achieved using a 24 pulse autotransformer based ac-dc converter. The idea is to use an autotransformer based 12-pulse ac-dc converter and incorporating pulse doubling method for improving power quality ac mains for feeding a direct torque controlled induction motor drive (DTCIMD) load. The scheme uses a star connected autotransformer to produce 12-pulses with flexibility to

  20. A vector controlled MCT matrix converter induction motor drive with minimized commutation times and enhanced waveform quality

    Microsoft Academic Search

    P. W. Wheeler; J. C. Clare; L. Empringham

    2002-01-01

    This paper describes the design, construction and testing of a 10 kVA three-phase to three-phase matrix converter induction motor drive. The converter has been built using discrete 65 Amp MOS controlled thyristors (MCTs). The commutation time has been minimized to avoid any unnecessary waveform distortion, particularly at low demanded output voltages. This minimization gives the Matrix Converter superior waveform quality

  1. An Adaptive Supervisory Sliding Fuzzy Cerebellar Model Articulation Controller for Sensorless Vector-Controlled Induction Motor Drive Systems

    PubMed Central

    Wang, Shun-Yuan; Tseng, Chwan-Lu; Lin, Shou-Chuang; Chiu, Chun-Jung; Chou, Jen-Hsiang

    2015-01-01

    This paper presents the implementation of an adaptive supervisory sliding fuzzy cerebellar model articulation controller (FCMAC) in the speed sensorless vector control of an induction motor (IM) drive system. The proposed adaptive supervisory sliding FCMAC comprised a supervisory controller, integral sliding surface, and an adaptive FCMAC. The integral sliding surface was employed to eliminate steady-state errors and enhance the responsiveness of the system. The adaptive FCMAC incorporated an FCMAC with a compensating controller to perform a desired control action. The proposed controller was derived using the Lyapunov approach, which guarantees learning-error convergence. The implementation of three intelligent control schemes—the adaptive supervisory sliding FCMAC, adaptive sliding FCMAC, and adaptive sliding CMAC—were experimentally investigated under various conditions in a realistic sensorless vector-controlled IM drive system. The root mean square error (RMSE) was used as a performance index to evaluate the experimental results of each control scheme. The analysis results indicated that the proposed adaptive supervisory sliding FCMAC substantially improved the system performance compared with the other control schemes. PMID:25815450

  2. Sliding-mode control of a six-phase series/parallel connected two induction motors drive.

    PubMed

    Abjadi, Navid R

    2014-11-01

    In this paper, a parallel configuration is proposed for two quasi six-phase induction motors (QIMs) to feed them from a single six-phase voltage source inverter (VSI). A direct torque control (DTC) based on input-output feedback linearization (IOFL) combined with sliding mode (SM) control is used for each QIM in stationary reference frame. In addition, an adaptive scheme is employed to solve the motor resistances mismatching problem. The effectiveness and capability of the proposed method are shown by practical results obtained for two QIMs in series/parallel connections supplied from a single VSI. The decoupling control of QIMs and the feasibility of their torque and flux control are investigated. Moreover, a complete comparison between series and parallel connections of two QIMs is given. PMID:25264286

  3. A novel approach to control of switched reluctance motors considering mutual inductance

    Microsoft Academic Search

    Han-Kyung Bae; R. Krishnan

    2000-01-01

    Torque control algorithms for switched reluctance motor (SRM) drives, hitherto have neglected mutual coupling between phases. Significant torque ripple in the magnitude of 6 to 10% is contributed by the mutual coupling effects of the phase windings. That is an unacceptable magnitude of torque ripple in high performance SRM drive systems. A novel torque control algorithm, which adopts simultaneous excitation

  4. Direct Torque Control with Full Order Stator Flux Observer for Dual-Three Phase Induction Motor Drives

    NASA Astrophysics Data System (ADS)

    Farina, Francesco; Bojoi, Radu; Tenconi, Alberto; Profumo, Francesco

    A Direct Torque Control (DTC) strategy for dual-three phase induction motor drives is discussed in this paper. The induction machine has two sets of stator three-phase windings spatially shifted by 30 electrical degrees with isolated neutral points. The proposed control strategy is based on Proportional Integral (PI) regulators implemented in the stator flux synchronous reference frame. To improve the flux estimation, an Adaptive Stator Flux Observer (ASFO) has been used. Doing so, besides a better flux estimation in contrast to open-loop flux estimators, it is possible to use the observed currents to compensate the inverter non-linear behavior (such as dead-time effects), improving the drive performance at low speed. This is particularly important for low voltage/high current applications, as the drive considered in this paper. The advantages of the discussed control strategy are: constant inverter switching frequency, good transient and steady-state performance and less distorted machine currents in contrast to DTC schemes with variable switching frequency. Experimental results are presented for a 10kW dual three-phase induction motor drive prototype.

  5. DSP-based speed adaptive flux observer of induction motor

    Microsoft Academic Search

    Hisao Kubota; Kouki Matsuse; T. Nakano

    1993-01-01

    A method for estimating the rotor flux and speed of an induction motor based on adaptive control theory is presented. The method is applied to a direct field-oriented induction motor control without speed sensors. The influence of the parameter variation on the speed estimation can be removed by the proposed parameter adaptive scheme. The validity of the adaptive flux observer

  6. Advanced Fault-Tolerant Control of Induction-Motor Drives for EV\\/HEV Traction Applications: From Conventional to Modern and Intelligent Control Techniques

    Microsoft Academic Search

    Mohamed El Hachemi Benbouzid; Demba Diallo; Mounir Zeraoulia

    2007-01-01

    This paper describes active fault-tolerant control systems for a high-performance induction-motor drive that propels an electrical vehicle (EV) or a hybrid one (HEV). The proposed systems adaptively reorganize themselves in the event of sensor loss or sensor recovery to sustain the best control performance, given the complement of remaining sensors. Moreover, the developed systems take into account the controller-transition smoothness,

  7. Motor Controllers

    NASA Technical Reports Server (NTRS)

    1984-01-01

    Kollmorgen Corporation's Mermaid II two person submersible is propeller-driven by a system of five DC brushless motors with new electronic controllers that originated in work performed in a NASA/DOE project managed by Lewis Research Center. A key feature of the system is electric commutation rather than mechanical commutation for converting AC current to DC.

  8. Modeling and simulation of matrix converter\\/induction motor drive

    Microsoft Academic Search

    Takayoshi Matsuo; Steffen Bernet; R. Stephen Colby; Thomas A. Lipo

    1998-01-01

    Modeling and simulation of a matrix converter\\/induction motor drive are presented in this paper, which includes a three phase ac to ac matrix converter, an induction motor, a field oriented controller, filters and a power source. In addition, a developed precise loss calculation model for power converters is described with calculation results when it was applied to the matrix converter.

  9. Fault Tolerant Control for Induction Motors using Sliding Mode N. DJEGHALI, M. GHANES, M. TADJINE, S. DJENNOUNE and J. P. BARBOT

    E-print Network

    Paris-Sud XI, Université de

    Fault Tolerant Control for Induction Motors using Sliding Mode Observers N. DJEGHALI, M. GHANES, M. TADJINE, S. DJENNOUNE and J. P. BARBOT Abstract-- In this paper a fault tolerant control design based and reconstruct the faults and also to estimate the flux. Then, additional control laws based on the estimates

  10. Application of Optimal Fuzzy PID Controller Design: PI Control for Nonlinear Induction Motor

    Microsoft Academic Search

    Jingwei Xu; Xin Feng; B. Mirafzal; Nabeel A. Demerdash

    2006-01-01

    We present in this paper a novel method (called PID design through numerical optimization) for the design of adaptive fuzzy PID controllers to achieve optimal control performance. By applying the numerical optimization, the fuzzy PID design problem is transferred to a numerical optimization problem. First, a fuzzy parameter tuner is built to generate initial PID parameters, including positions and shapes

  11. Fuzzy efficiency optimization of AC induction motors

    NASA Technical Reports Server (NTRS)

    Jani, Yashvant; Sousa, Gilberto; Turner, Wayne; Spiegel, Ron; Chappell, Jeff

    1993-01-01

    This paper describes the early states of work to implement a fuzzy logic controller to optimize the efficiency of AC induction motor/adjustable speed drive (ASD) systems running at less than optimal speed and torque conditions. In this paper, the process by which the membership functions of the controller were tuned is discussed and a controller which operates on frequency as well as voltage is proposed. The membership functions for this dual-variable controller are sketched. Additional topics include an approach for fuzzy logic to motor current control which can be used with vector-controlled drives. Incorporation of a fuzzy controller as an application-specific integrated circuit (ASIC) microchip is planned.

  12. A new graphic method for stability analysis of speed sensorless FO controlled induction motor drives working at low speed in regenerative mode

    Microsoft Academic Search

    G. Griva; F. Profumo; A. Tenconi

    1998-01-01

    In this paper, a graphic method to analyze, on the torque versus speed plane, the stability of a speed sensorless field oriented (FO) controlled induction motor drive is proposed. A decoupling control is used to generate the voltage commands from the current commands instead of the traditional current regulators. The speed is estimated using a Luenberger speed observer, that has

  13. Fast Fourier and discrete wavelet transforms applied to sensorless vector control induction motor for rotor bar faults diagnosis.

    PubMed

    Talhaoui, Hicham; Menacer, Arezki; Kessal, Abdelhalim; Kechida, Ridha

    2014-09-01

    This paper presents new techniques to evaluate faults in case of broken rotor bars of induction motors. Procedures are applied with closed-loop control. Electrical and mechanical variables are treated using fast Fourier transform (FFT), and discrete wavelet transform (DWT) at start-up and steady state. The wavelet transform has proven to be an excellent mathematical tool for the detection of the faults particularly broken rotor bars type. As a performance, DWT can provide a local representation of the non-stationary current signals for the healthy machine and with fault. For sensorless control, a Luenberger observer is applied; the estimation rotor speed is analyzed; the effect of the faults in the speed pulsation is compensated; a quadratic current appears and used for fault detection. PMID:25004798

  14. Sensorless performance evaluation of induction motors 

    E-print Network

    Ahmed, Shehab

    2000-01-01

    . 1 Introduction The induction motor, since its invention by Nikola Tesla in 1886 has reserved a prominent position in the clcctromechanical energy conversion industry. Induction motors account for approximately 70% of the electromechanical energy... can cause interactions bctwccn parasitic components of air-gap flux and the fundamental which in turn can lead to vibrations, high noise levels, and crawling ol' the induction motor. Throughout the many years of experience that designer's have gone...

  15. Online Diagnosis of Induction Motors Using MCSA

    Microsoft Academic Search

    Jee-Hoon Jung; Jong-Jae Lee; Bong-Hwan Kwon

    2006-01-01

    In this paper, an online induction motor diagnosis system using motor current signature analysis (MCSA) with advanced signal-and-data-processing algorithms is proposed. MCSA is a method for motor diagnosis with stator-current signals. The proposed system diagnoses induction motors having four types of faults such as breakage of rotor bars and end rings, short-circuit of stator windings, bearing cracks, and air-gap eccentricity.

  16. MRAS based online magnetizing inductance estimation of linear induction motor

    Microsoft Academic Search

    JinQi Ren; YaoHua Li

    2007-01-01

    Due to the dynamic end effect, the parameters of SLIM (single sided Linear induction motor) can vary greatly during the operation stage, and cannot be obtained accurately through offline parameter identification method. An adjustable dynamic motor model based on state space equations of LIM is established and a new online identification method based on MRAS is presented, magnetizing inductance of

  17. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 56, NO. 2, MARCH 2007 519 Advanced Fault-Tolerant Control of Induction-Motor

    E-print Network

    Paris-Sud XI, Université de

    . This is especially important in high- impact automotive applications, such as electrical vehicles (EVs) and hybrid-tolerant control sys- tems for a high-performance induction-motor drive that propels an electrical vehicle (EV) or a hybrid one (HEV). The proposed systems adaptively reorganize themselves in the event of sensor loss

  18. A sensorless control for damping of torsional vibrations with middle voltage induction motor drive for compressor application

    Microsoft Academic Search

    Koichiro Nagata; Haruo Nemoto; Toshio Katayama; Yoshitoshi Akita

    2011-01-01

    In this paper the converter control method against damping torsional vibration of megawatt class compressor system is proposed. This method is based on field-oriented vector control. The main block is very simple but the motor torque can be controlled to enlarge the electric dumping coefficient easily. And the proposed method has good robustness for motor parameters and can decrease torsional

  19. Experimental implementation of a robust damped-oscillation control algorithm on a full-sized, two-degree-of-freedom, AC induction motor-driven crane

    SciTech Connect

    Kress, R.L.; Jansen, J.F.; Noakes, M.W.

    1994-05-01

    When suspended payloads are moved with an overhead crane, pendulum like oscillations are naturally introduced. This presents a problem any time a crane is used, especially when expensive and/or delicate objects are moved, when moving in a cluttered an or hazardous environment, and when objects are to be placed in tight locations. Damped-oscillation control algorithms have been demonstrated over the past several years for laboratory-scale robotic systems on dc motor-driven overhead cranes. Most overhead cranes presently in use in industry are driven by ac induction motors; consequently, Oak Ridge National Laboratory has implemented damped-oscillation crane control on one of its existing facility ac induction motor-driven overhead cranes. The purpose of this test was to determine feasibility, to work out control and interfacing specifications, and to establish the capability of newly available ac motor control hardware with respect to use in damped-oscillation-controlled systems. Flux vector inverter drives are used to investigate their acceptability for damped-oscillation crane control. The purpose of this paper is to describe the experimental implementation of a control algorithm on a full-sized, two-degree-of-freedom, industrial crane; describe the experimental evaluation of the controller including robustness to payload length changes; explain the results of experiments designed to determine the hardware required for implementation of the control algorithms; and to provide a theoretical description of the controller.

  20. Steady state performance and electrical stability analysis of matrix converter fed induction motor drive under Volt\\/Hertz control

    Microsoft Academic Search

    Melaku Mihret; Olorunfemi Ojo; Meharegzi Abreham

    2011-01-01

    A new generalized model for stability analysis based on a small signal modeling is proposed, for matrix converter fed induction motor drive system. This approach considers the analysis when the drive system operates at unity as well as non-unity input power factor at the source side. With the help of this model, different factors which affect the matrix converter stability

  1. Transistorized PWM inverter-induction motor drive system

    NASA Technical Reports Server (NTRS)

    Peak, S. C.; Plunkett, A. B.

    1982-01-01

    This paper describes the development of a transistorized PWM inverter-induction motor traction drive system. A vehicle performance analysis was performed to establish the vehicle tractive effort-speed requirements. These requirements were then converted into a set of inverter and motor specifications. The inverter was a transistorized three-phase bridge using General Electric power Darlington transistors. The description of the design and development of this inverter is the principal object of this paper. The high-speed induction motor is a design which is optimized for use with an inverter power source. The primary feedback control is a torque angle control with voltage and torque outer loop controls. A current-controlled PWM technique is used to control the motor voltage. The drive has a constant torque output with PWM operation to base motor speed and a constant horsepower output with square wave operation to maximum speed. The drive system was dynamometer tested and the results are presented.

  2. Transistorized PWM inverter-induction motor drive system

    NASA Astrophysics Data System (ADS)

    Peak, S. C.; Plunkett, A. B.

    1982-10-01

    This paper describes the development of a transistorized PWM inverter-induction motor traction drive system. A vehicle performance analysis was performed to establish the vehicle tractive effort-speed requirements. These requirements were then converted into a set of inverter and motor specifications. The inverter was a transistorized three-phase bridge using General Electric power Darlington transistors. The description of the design and development of this inverter is the principal object of this paper. The high-speed induction motor is a design which is optimized for use with an inverter power source. The primary feedback control is a torque angle control with voltage and torque outer loop controls. A current-controlled PWM technique is used to control the motor voltage. The drive has a constant torque output with PWM operation to base motor speed and a constant horsepower output with square wave operation to maximum speed. The drive system was dynamometer tested and the results are presented.

  3. Optimized performance of solar powered variable speed induction motor drive

    Microsoft Academic Search

    Bhim Singh; A. Chandra; K. Al-Haddad

    1996-01-01

    This paper deals with the design and development of a photovoltaic (PV) array fed cage induction motor for an isolated water pumping system. A drive system using a chopper circuit to track power from the PV for different solar and a current controlled voltage source inverter (CC-VSI) to optimally match the motor to PV characteristics is presented. The model equations

  4. Multi-star induction motors fed by voltage source inverters

    Microsoft Academic Search

    H. Stemmler; R. Deplazes

    1997-01-01

    This paper deals with the problems of multi-star induction motors fed by voltage source inverters. After an introduction, the structure of this drive system is described using the example of a 3-star motor with three independent 3-phase windings in the stator which are phase shifted mechanically against each other. Based on the transient equations derived, a control structure is proposed.

  5. Voltage-induction type electrostatic film motor driven by two- to four-phase ac voltage and electrostatic induction

    Microsoft Academic Search

    Norio Yamashita; Zu Guang Zhang; Akio Yamamoto; Masahiko Gondo; Toshiro Higuchi

    2007-01-01

    This paper describes a voltage-induction type electrostatic film motor that operates by feeding electric power to the slider by electrostatic induction. In the electrostatic motor, applying voltages to both of its stator and slider contributes to its fine positioning resolution and better controllability. However, in some cases such as relatively small motors, the electric wires connected to the slider could

  6. A Loss-Minimization DTC Scheme for EV Induction Motors A. Haddoun1

    E-print Network

    Paris-Sud XI, Université de

    of an induction motor propelling and Electric Vehicle (EV). The proposed control strategy, based on a Direct Flux, among EV's motor electric propulsion features; the energy efficiency is a basic characteristic and the performance of the proposed control approach. Index Terms--Electric vehicle, induction motor, DTC, loss

  7. Speed control systems for three phase induction motor using fixed pattern PWM wave

    Microsoft Academic Search

    S. Mohammadi

    1993-01-01

    A fixed pulse width modulation (PWM) pattern and a PWM wave analyzed by computer are discussed. To produce this kind of controller, the basis of the control system is approximated. A parallel proportional, integral, differential (PID) error amplifier is used in this system to optimize and minimize the response time. In designing this system, the availability and cost of technology

  8. A survey on speed estimation for ensorless control of induction motors

    Microsoft Academic Search

    M. A. Gallegos; R. Alvarez; C. A. NunTez

    2006-01-01

    The speed controlled AC drives without mechanical speed sensors have the attraction of low cost and high reliability. The sensorless control techniques require of the estimation of internal state variables of the machine like the linkage fluxes and the rotor speed. Generally, the estimation of the rotor speed is achieved through only the measurement of voltages and currents. Robustness of

  9. Induction motors' faults detection and localization using stator current advanced signal processing techniques

    Microsoft Academic Search

    Mohamed El Hachemi Benbouzid; Michelle Vieira; C. Theys

    1999-01-01

    The knowledge about fault mode behavior of an induction motor drive system is extremely important from the standpoint of improved system design, protection, and fault-tolerant control. This paper addresses the application of motor current spectral analysis for the detection and localization of abnormal electrical and mechanical conditions that indicate, or may lead to, a failure of induction motors. Intensive research

  10. Neural network based speed identification for speed-sensorless induction motor drives

    Microsoft Academic Search

    Liping Fan; Yi Liu

    2010-01-01

    Controlled induction motor drives without mechanical speed sensors at the motor shaft have the attractions of low cost and high reliability. For these speed sensorless AC drive system, it is key to realize speed estimation accurately. Because the induction motors have some inherent characteristics such as multivariate, parameter indeterminacy, strong coupling and non-linearity, speed sensorless observer scheme based on model

  11. A linear induction motor conveyer 

    E-print Network

    Solinsky, Kenneth Sheldon

    1973-01-01

    , for their assistance in setting up f'acilities for testing the linear motor, and for their hoLp in clarifying some poLnts regardIng the mo- toz ' s operation. The author is most grateful to hi wife, Grace. Not only did she do all the typing for the thesis, 'but... of the Motor VI. LINEAR MOTOR CONSTRUCTION VII. LINEAR MOTOR PERFORMANCE Evaluation of Graphs Page iii 3X 7 8 13 23 23 32 51 55 60 62 67 69 69 71 86 91 ChaPter VIII. COST AND OTHER CONSIDERATIONS INVOLVED IN TRE SELECTION OF A LINEAR...

  12. A self-reconfigurable and fault-tolerant induction motor control architecture

    E-print Network

    Paris-Sud XI, Université de

    conditioning/heat pumps, engine cooling fans, and electric vehicles. This is especially important in high industrial systems the unit cost is a paramount issue. Hence cheap fault-tolerant control has become an important industrial research area. The objective is to give solutions that provide fault

  13. Study and Simulation of Direct Torque Control of Double-Star Induction Motor Drive

    Microsoft Academic Search

    Khoudir Marouani; Farid Khoucha; Abdelaziz Kheloui; Lotfi Baghli; Djafar Hadiouche

    2006-01-01

    The major drawback of usual dual three-phase AC machines when supplied by a voltage source inverter (VSI), is the occurrence of extra harmonic currents. These extra currents circulate only in the stator windings and cause additional losses. One solution to reduce their amplitude is to act on the supply side using dedicated PWM control strategies. In this paper, we present

  14. Computational analysis of temperature rise phenomena in electric induction motors

    E-print Network

    Melnik, Roderick

    Computational analysis of temperature rise phenomena in electric induction motors Ying Huai: Electric induction motor; Thermal model; Finite element analysis frequency 1. Introduction An electric of the motor under the given operating conditions. The thermal analysis of electric induction motors can

  15. Simulation Model of Induction Motor Based on LabVIEW

    Microsoft Academic Search

    Li Qianxiang; Hu Jingtao

    2010-01-01

    The state equation for induction motor in the two stationary coordinates was developed. A dynamic model of induction motor was established based on the graphical programming environment of Lab VIEW, The corrective and effectiveness of motor model based on Lab VIEW are verified with a simulation experiment. At the same time, the static model of induction motor was established to

  16. Induction-motor field efficiency evaluation using instantaneous phasor method

    SciTech Connect

    Hsu, J.S.

    1998-08-01

    Induction motors are the most commonly used motors in industry. They are important components in the chains of drive systems. Motor efficiency is the ratio of shaft output power to motor input power. IEEE Std 112 presents many methods for induction-motor efficiency tests that may not all be suitable for field efficiency evaluations. The new instantaneous phasor method originated by the author is applied for the evaluation of efficiency of induction motors installed in the field.

  17. FORTRAN program for induction motor analysis

    NASA Technical Reports Server (NTRS)

    Bollenbacher, G.

    1976-01-01

    A FORTRAN program for induction motor analysis is described. The analysis includes calculations of torque-speed characteristics, efficiency, losses, magnetic flux densities, weights, and various electrical parameters. The program is limited to three-phase Y-connected, squirrel-cage motors. Detailed instructions for using the program are given. The analysis equations are documented, and the sources of the equations are referenced. The appendixes include a FORTRAN symbol list, a complete explanation of input requirements, and a list of error messages.

  18. Control and performance of a flywheel energy storage system based on a doubly-fed induction generator-motor for power conditioning

    Microsoft Academic Search

    Hirofumi Akagi; H. Sato

    1999-01-01

    A flywheel energy storage system based on a doubly-fed induction generator-motor basically consists of a wound-rotor induction machine and a cycloconverter or a voltage-source PWM rectifier-inverter which is used as an AC exciter. Adjusting the rotor speed makes the generator-motor either release the kinetic energy to the power system or absorb it from the utility grid. Thus, the generator-motor has

  19. Non-conventional supplying system for induction traction motors from Diesel locomotives

    Microsoft Academic Search

    M. Huzau; R. Both; E. H. Dulf; V. Tulbure

    2010-01-01

    The evolution of the power electronic devices (with proper control strategies) enables the replacement of the DC traction motor with the more advantageous induction motor in railway application. The AC traction motors ask for expensive, intricate inverters with semiconductors working under high electric stress. For the Diesel-electric locomotives, the authors propose an original non-conventional supplying system for AC motor with

  20. Bridge Inductance of Induction Motor with Closed Rotor Slots

    NASA Astrophysics Data System (ADS)

    Matsushita, Makoto; Ishibashi, Fuminori; Suzuki, Takao; Noda, Shinichi

    Closed rotor slots are widely employed in low-power squirrel-cage induction motors with die-cast aluminum cage rotors. Die-cast aluminum cages with closed rotor slots can be manufactured commercially. They help reduce flux pulsation in air gaps, attenuate acoustic noises, and achieve high efficiency. However, it is difficult to calculate bridge inductance of a closed rotor slot accurately because the main flux passes through the bridge and iron saturation can be achieved depending upon the bar current. In this study, bridge inductance was investigated by using a search coil and by FEM analysis and conventional equations. The bridge flux density and the bridge linkage flux were measured by using 4P-0.75kW motor with closed rotor slots, and the bridge inductance was calculated as a function of rotor bar current. The bridge inductance was also analyzed by FEM, and the results were analytically checked by using the calculated conventional equations. From these analyses, it is seen that the measured values of the bridge inductance are in good agreement with the values calculated by FEM and conventional methods. It is verified that the bridge inductance shows a trend similar to that of the ?-H curve of the rotor steel sheet.

  1. Type-2 fuzzy logic control based MRAS speed estimator for speed sensorless direct torque and flux control of an induction motor drive.

    PubMed

    Ramesh, Tejavathu; Kumar Panda, Anup; Shiva Kumar, S

    2015-07-01

    In this research study, a model reference adaptive system (MRAS) speed estimator for speed sensorless direct torque and flux control (DTFC) of an induction motor drive (IMD) using two adaptation mechanism schemes are proposed to replace the conventional proportional integral controller (PIC). The first adaptation mechanism scheme is based on Type-1 fuzzy logic controller (T1FLC), which is used to achieve high performance sensorless drive in both transient as well as steady state conditions. However, the Type-1 fuzzy sets are certain and unable to work effectively when higher degree of uncertainties presents in the system which can be caused by sudden change in speed or different load disturbances, process noise etc. Therefore, a new Type-2 fuzzy logic controller (T2FLC) based adaptation mechanism scheme is proposed to better handle the higher degree of uncertainties and improves the performance and also robust to various load torque and sudden change in speed conditions, respectively. The detailed performances of various adaptation mechanism schemes are carried out in a MATLAB/Simulink environment with a speed sensor and speed sensorless modes of operation when an IMD is operating under different operating conditions, such as, no-load, load and sudden change in speed, respectively. To validate the different control approaches, the system also implemented on real-time system and adequate results are reported for its validation. PMID:25887841

  2. Stepping Motor Control System

    E-print Network

    Larson, Noble G.

    This paper describes a hardware system designed to facilitate position and velocity control of a group of eight stepping motors using a PDP-11. The system includes motor driver cards and other interface cards in addition ...

  3. INDUCTION MOTOR FAULT DIAGNOSTIC AND MONITORING METHODS

    E-print Network

    Povinelli, Richard J.

    INDUCTION MOTOR FAULT DIAGNOSTIC AND MONITORING METHODS by Aderiano M. da Silva, B.S. A Thesis Acknowledgement Special thanks for my advisor Dr. Richard J. Povinelli for his teaching, support and encouragement, support and discussions during this research. Finally, I would like to thanks my wife Marcia Silva for her

  4. Induction Motors Bearing Failures Detection and Diagnosis

    E-print Network

    Boyer, Edmond

    331 1 Induction Motors Bearing Failures Detection and Diagnosis Using a RBF ANN Park Pattern Based Method I. Y. Önel, I. enol and M. E. H. Benbouzid Abstract--This paper deals with the problem of bearing detection and diagnosis process. Experimental tests with artificial bearing damages results show

  5. Modeling and Minimization of Speed Ripple of a Faulty Induction Motor with Broken Rotor Bars

    Microsoft Academic Search

    M. Nasir Uddin; W. Wang; Z. R. Huang

    2008-01-01

    This paper presents the modeling and minimization technique for speed ripple of a vector controlled faulty induction motor (FIM) with broken rotor bars. First, the performance of the FIM is investigated in terms of speed ripple under the open-loop condition. Then, a new mechanical model of induction motor is developed incorporating the speed ripple. Based on this model a new

  6. Design and Simulation of An Inverter-fed Induction motor for Electric Vehicles

    Microsoft Academic Search

    Huijuan liu; Yihuang zhang; Qionglin zheng; Sizhou guo

    2007-01-01

    The variable-frequency induction motor used in electric vehicle is investigated in this paper. Firstly the design method of a voltage inverter-fed induction motor is introduced, and then the calculation methods of electromagnetic parameter are presented and programmed in VB (Visual Basic) software. Based on the geometrical dimensions and parameters, a simulation model in the vector control system is used to

  7. Optimal Energy Saving Control of Induction Motors Fed by Variable-Voltage and Variable-Frequency Source for Refrigeration and Air Conditioning Systems

    Microsoft Academic Search

    Juh-Shinun Lin

    It is well known that the axial power of an air conditioning system is proportional to the cubic power of the motor speed. This paper is concerned with the determination and experiment of the input voltage and frequency for the optimal efficiency operation of induction motors which drive the air handing unit blower, the cooling tower fan and the chiller

  8. Concatenated Induction Motors for Rolling Mill Drive

    Microsoft Academic Search

    William O. Oschmann

    1914-01-01

    The paper describes a six-speed concatenated induction motor set for driving the finishing rolls of a 12-stand continuous mill. Analysis of the conditions in this mill showed that the use of a low-pressure turbine would lead to the waste of a large amount of exhaust steam and that the alternating-current turbine plant which was in operation had ample reserve capacity

  9. Stepping motor controller

    DOEpatents

    Bourret, Steven C. (Los Alamos, NM); Swansen, James E. (Los Alamos, NM)

    1984-01-01

    A stepping motor is microprocessingly controlled by digital circuitry which monitors the output of a shaft encoder adjustably secured to the stepping motor and generates a subsequent stepping pulse only after the preceding step has occurred and a fixed delay has expired. The fixed delay is variable on a real-time basis to provide for smooth and controlled deceleration.

  10. Method and apparatus for monitoring the rotating frequency of de-energized induction motors

    DOEpatents

    Mikesell, H.E.; Lucy, E.

    1998-02-03

    The rotational speed of a coasting induction motor is measured by sensing e residual electrical voltages at the power terminals of the motor, thus eliminating the need for conventional tachometer equipment, additional mechanical components or modifications to the induction motor itself. The power terminal voltage signal is detected and transformed into a DC voltage proportional to the frequency of the signal. This DC voltage can be input to the control system of a variable frequency motor controller to regulate the output characteristics thereof relative to the speed of the coasting motor. 6 figs.

  11. A general scheme for induction motor condition monitoring

    Microsoft Academic Search

    P. Vicente; J. Rodriguez; M. Negrea; A. Arkkio

    2005-01-01

    This work proposes a general scheme to detect induction motor faults by monitoring the motor current. The scheme is based on signal processing (predictive filters), soft computing techniques (fuzzy logic), the analytical studies of induction motor under fault conditions and the analysis of data generated by finite element method (FEM). The predictive filter is used in order to separate the

  12. Stator fault estimation in induction motors using particle swarm optimization

    Microsoft Academic Search

    Hassan M. Emara; M. E. Ammar; A. Bahgat; H. T. Dorrah

    2003-01-01

    The use of induction motors is extensive in industry. The working conditions of these motors make them subject to many faults. These faults must be detected in an early stage before they lead to catastrophic failures. This paper presents a scheme for detecting inter-turn faults in the stator windings of induction motors and estimating the fault severity. Detection of incipient

  13. Induction machine condition monitoring using notch-filtered motor current

    Microsoft Academic Search

    Serkan Günal; Ömer Nezih Gerek

    2009-01-01

    This paper presents a new approach to induction motor condition monitoring using notch-filtered motor current signature analysis (NFMCSA). Unlike most of the previous work utilizing motor current signature analysis (MCSA) using spectral methods to extract required features for detecting motor fault conditions, here NFMCSA is performed in time-domain to extract features of energy, sample extrema, and third and fourth cumulants

  14. Narrowband angle modulations in induction motor complex current vectors

    Microsoft Academic Search

    Zhi Gao; R. S. Colby; L. Turner; B. Leprettre

    2009-01-01

    Periodically time-varying loads such as reciprocating compressors produce torque and speed variations in grid-connected induction motors that are used to drive them. In each compression cycle, the torque and speed variations manifest themselves through periodic pulsations in induction motor's complex current vectors. Based on the concept of narrowband angle modulations, this paper analyzes the complex current vector's behavior in a

  15. High-speed induction motor development for small centrifugal compressor

    Microsoft Academic Search

    Young-Kwan Kim; Moon-Chang Choi; Kwang-Ha Suh; Yu-Chul Ji; Dae-Sung Wang

    2001-01-01

    This paper describes a brief overview of problems and features related to the electromagnetic and mechanical design and construction of a high-speed induction motor to drive a centrifugal compressor in commercial HVAC system. The prototype 15 HP at 56500 RPM induction motor was manufactured and successfully tested in the compressor test equipment

  16. Computational analysis of temperature rise phenomena in electric induction motors

    Microsoft Academic Search

    Ying Huai; Roderick V. N Melnik; Paul B Thogersen

    2003-01-01

    In developing electric machines in general, and induction motors in particular, temperature limits is a key factor affecting the efficiency of the overall design. Since conventional loading of induction motors is often expensive, the estimation of temperature rise by tools of mathematical modelling and computational experiments becomes increasingly important. In the present paper we develop and validate experimentally a model

  17. Five-level GTO inverters for large induction motor drives

    Microsoft Academic Search

    R. W. Menzies; P. Steimer; J. K. Steinke

    1994-01-01

    The development of large induction motor drives with low torque ripple and fast dynamic response for new or retrofit applications has been limited by the device ratings and problems of series connections. This paper investigates the use of a five-level GTO voltage-sourced inverter for large induction motor drives. The advantages of such a drive are that single GTO thyristors may

  18. Induction motor condition monitoring using industrial wireless sensor networks

    Microsoft Academic Search

    Liqun Hou; Neil W Bergmann

    2010-01-01

    An induction motor condition monitoring system using industrial wireless sensor networks (IWSNs) with and without on-sensor data processing are described and compared. The prototype system has been implemented and validated on a single phase induction motor in the laboratory. On-sensor data processing is explored to alleviate the contradictions between the higher performance requirements of IWSNs such as higher sample rate

  19. Evaluation of electromagnetic load influence on induction motor quality indices

    Microsoft Academic Search

    D. M. Glukhov

    2001-01-01

    Nowadays important problems of modern electrical machines are relative mass decrease, dimensions decrease and energetic indices increase. Traditional technique is impractical in this case. Therefore, it is necessary to find a new way of decreasing induction motor mass-overall indices. The aim of the investigation is evaluation of electromagnetic load influence on quality indices and mass-overall indices of induction motors. Mathematical

  20. Influence of induction motor modelling for undervoltage load shedding studies

    Microsoft Academic Search

    Ragu Balanathan

    2002-01-01

    This paper explores the influence of modelling induction motor loads for undervoltage load shedding studies. A first order and a third order dynamic load model in terms of real power, reactive power and voltage are defined using the 'slip' and 'slip flux' induction motor models, respectively. In a voltage unstable situation it is shown that the real power and reactive

  1. Using temperature, voltage, and\\/or speed measurements to improve trending of induction motor RMS currents in process control and diagnostics

    Microsoft Academic Search

    Carl J. Dister; Rich Schiferl

    1998-01-01

    Trending RMS current in an induction motor is often performed in industrial processes because of the availability and easy measurement of the parameter. This current can deviate widely with temperature, voltage and speed, making it difficult to determine process changes that are to be detected. Current deviations due to normal operation of the system can be corrected by applying the

  2. Analyses of unbalanced voltages on startup transients of a three-phase induction motor using EMTP MODELS

    Microsoft Academic Search

    Li Wang; Lih-Shyh Liu

    2000-01-01

    This paper presents a novel scheme on startup transients of a three-phase induction motor under unbalanced voltages. The new simulation tool-the Electro-Magnetic Transients Program (EMTP) MODELS is employed to accurately simulate the transient behavior of an induction motor during startup. The three-phase voltages applied to the stator windings of the studied induction motor are controlled by respectively adjusting the magnitude

  3. A simplified scheme for induction motor condition monitoring

    Microsoft Academic Search

    Pedro Vicente Jover Rodríguez; Marian Negrea; Antero Arkkio

    2008-01-01

    This work proposes a general scheme to detect induction motor fault by monitoring the motor current. The scheme is based on signal processing (predictive filters) and soft computing technique (fuzzy logic). The predictive filter is used in order to separate the fundamental component from the harmonic components. Fuzzy logic is used to identify the motor state. Finite element method (FEM)

  4. Noninvasive detection of broken rotor bars in operating induction motors

    Microsoft Academic Search

    G. B. Kliman; R. A. Koegl; J. Stein; R. D. Endicott; M. W. Madden

    1988-01-01

    A description is given of a computer-based noninvasive broken bar fault detector for squirrel-cage rotors of induction motors. The detector can be applied to existing motors without disassembly or shutdown and has the sensitivity to diagnose the presence of a single broken bar or an open end ring. It is suitable for monitoring the trend of the motor signature, or

  5. Finite Element Analysis, modeling and torque distribution control for Switched Reluctance Motors with high non-linear inductance characteristics

    Microsoft Academic Search

    Bao-Huy Nguyen; Cao-Minh Ta

    2011-01-01

    Due to the naturally high torque ripple and non- linear characteristics, the applications of Switched Reluctance Motors (SRM) drives are very limited. It is well known that the Torque Distribution Functions (TDFs) method is one of the most effective methods to reduce their torque ripple. This paper presents an analysis of the drawback of TDFs when they are utilized for

  6. Power Factor Correction of Single-Phase Induction Motor Using Magnetic Energy Recovery Switch

    NASA Astrophysics Data System (ADS)

    Takaku, Taku; Narushima, Jun; Isobe, Takanori; Kitahara, Tadayuki; Shimada, Ryuichi

    Magnetic energy recovery switch (MERS) has a function of automatic power factor correction of series connected load. The MERS is applied for a single-phase induction motor to improve the power factor. Two control methods of the MERS for power factor correction are described in this paper. Experiments were carried out and confirmed that the input power factor of a single-phase induction motor is improved.

  7. Equivalence Between Squirrel Cage and Sheet Rotor Induction Motor

    NASA Astrophysics Data System (ADS)

    Dwivedi, Ankita; Singh, S. K.; Srivastava, R. K.

    2015-03-01

    Due to topological changes in dual stator induction motor and high cost of its fabrication, it is convenient to replace the squirrel cage rotor with a composite sheet rotor. For an experimental machine, the inner and outer stator stampings are normally available whereas the procurement of rotor stampings is quite cumbersome and is not always cost effective. In this paper, the equivalence between sheet/solid rotor induction motor and squirrel cage induction motor has been investigated using layer theory of electrical machines, so as to enable one to utilize sheet/solid rotor in dual port experimental machines.

  8. Transient effects of PWM drives on induction motors

    SciTech Connect

    Melhorn, C.J.; Le Tang [Electrotek Concepts, Inc., Knoxville, TN (United States)

    1995-12-31

    With the advances in semi-conductor devices, adjustable speed drives (ASDs) have become more prevalent than ever before in industrial and commercial processes. Many facilities are installing ASDs to improve the efficiency of their processes and to increase the control of their processes. While the effects of ASDs on the power system are well known, many engineers and systems integrators are not aware of the effects that ASDs can have on the motor that is driven by the drive. This paper describes the techniques used to measure, analyze, and simulate the problems associated with the use of PWM ASDs to drive induction motors. Measures to mitigate these problems are also discussed. The Electro-Magnetic Transients Program (EMTP) is used to simulate the phenomena, compare results against measurements, and evaluate mitigation techniques.

  9. An economical single to three phase converter for induction motors 

    E-print Network

    Di Zerega, Philp Van Uytandaele

    1994-01-01

    There are several different types of single to three phase converters for induction motors available today. However, many of the presently available phase converters suffer from disadvantages such as high cost or low performance. An economical...

  10. Load-Commutated SCR Current-Source-Inverter-Fed Induction Motor Drive With Sinusoidal Motor Voltage and Current

    Microsoft Academic Search

    Debmalya Banerjee; V. T. Ranganathan

    2009-01-01

    Current source inverter (CSI) is an attractive solution in high-power drives. The conventional gate turn-off thyristor (GTO) based CSI-fed induction motor drives suffer from drawbacks such as low-frequency torque pulsation, harmonic heating, and unstable operation at low-speed ranges. These drawbacks can be overcome by connecting a current-controlled voltage source inverter (VSI) across the motor terminal replacing the bulky ac capacitors.

  11. An evaluation of inductances of a squirrel-cage induction motor under mixed eccentric conditions

    Microsoft Academic Search

    Jawad Faiz; Iman Tabatabaei Ardekanei; Hamid A. Toliyat

    2003-01-01

    This paper presents a more precise model for computation of three-phase squirrel cage induction machine inductances under different eccentric conditions. Generally, available techniques are based on the winding function theory and simplification and geometrical approximation of unsymmetrical models of the motor under mixed eccentricities. This paper determines a precise geometrical model under the mixed eccentricity conditions and evaluates the inductances.

  12. Efficiency Optimization of Slitted-Core Induction Motor

    NASA Astrophysics Data System (ADS)

    Yetgin, Asim Gökhan; Turan, Mustafa

    2014-01-01

    In this study, a 3kW squirrel cage induction motor having slits in stator and rotor teeth were examined. The slit depth and width in the 56 different slitted motor models were optimized with Finite Element Method Magnetics (FEMM) software by using Finite Elements Method (FEM). What value the depth and width of optimum slit should be was determined in order to obtain maximum motor efficiency in the new motor models created with the proposed slitted structure, and how the depth and width of slit could affect the performance of motor was demonstrated.

  13. Transient effects in application of PWM inverters to induction motors

    Microsoft Academic Search

    E. Persson

    1992-01-01

    Standard squirrel cage induction (SCI) motors are subjected to nonsinusoidal waveshapes when supplied form adjustable-frequency inverters. In addition to causing increased heating, these wave patterns can be destructive to the insulation. In particular, pulse width modulated (PWM) inverter output amplitudes and rise times are investigated. Motor insulation capabilities are discussed. In this paper, voltage reflections are simulated for various cable

  14. Performance Analysis of Saturated Induction Motors by Virtual Tests

    ERIC Educational Resources Information Center

    Ojaghi, M.; Faiz, J.; Kazemi, M.; Rezaei, M.

    2012-01-01

    Many undergraduate-level electrical machines textbooks give detailed treatments of the performance of induction motors. Students can deepen this understanding of motor performance by performing the appropriate practical work in laboratories or in simulation using proper software packages. This paper considers various common and less-common tests…

  15. Systems engineering for large induction motor adjustable frequency drives

    Microsoft Academic Search

    Frank A. DeWinter; L. M. Benke

    1991-01-01

    The application of large, medium-voltage induction motor adjustable frequency drives requires substantially more systems engineering than that of low-horsepower drives. The power supply, drive, motor, and driven equipment must be integrated as a system for a successful installation. Concerns over mechanical and electrical resonances, harmonics, drive cooling systems and other application problems are presented. The aim of this study is

  16. An Improved Fixed Switching Frequency Direct Torque Control of Induction Motor Drives Fed by Direct Matrix Converter

    E-print Network

    Taib, Nabil; Francois, Bruno

    2010-01-01

    A few papers have been interested by the fixed switching frequency direct torque control fed by direct matrix converters, where we can find just the use of direct torque controlled space vector modulated method. In this present paper, we present an improved method used for a fixed switching frequency direct torque control (DTC) using a direct matrix converter (DMC). This method is characterized by a simple structure, a fixed switching frequency which causes minimal torque ripple and a unity input power factor. Using this strategy, we combine the direct matrix converters advantages with those of direct torque control (DTC) schemes. The used technique for constant frequency is combined with the input current space vector to create the switching table of direct matrix converter (DMC). Simulation results clearly demonstrate a better dynamic and steady state performances of the proposed method.

  17. About the Quasi-Direct Feed Possibility of the Induction Traction Motors from Diesel-electric Locomotives

    Microsoft Academic Search

    Mihai Huzau; Eva Dulf; Clement Festila

    2006-01-01

    The replacement of the DC motors in railway traction with induction motors is a general tendency for rolling-stock producers and users due to the advantage of the second version. A general structure and topology for the traction motor supply and control is generally accepted and comprises as main component, the inverter, based on expensive power electronic devices. The authors present

  18. Six-Phase Voltage Source Inverter Driven Induction Motor

    Microsoft Academic Search

    Mohamed A. Abbas; Roland Christen; Thomas M. Jahns

    1984-01-01

    A six-phase six-step voltage-fed induction motor is presented. The inverter is a transistorized six-step voltage source inverter, while the motor is a modified standard three-phase squirrel-cage motor. The stator is rewound with two three-phase winding sets displaced from each other by 30 electrical degrees. A model for the system is developed to simulate the drive and predict its performance. The

  19. Motor flux minimization controller based on fuzzy logic control for DTC AC drives

    Microsoft Academic Search

    Eleftheria S. Sergaki

    2010-01-01

    This work presents a real time optimum flux adjustment fuzzy controller is cooperated with Direct Torque Control (DTC) adjustable speed drive (ASD) for ac Induction motors, in order to achieve the motor drive loss minimization while meeting the load and speed demands. The proposed control scheme includes a DTC controller, a speed controller and an optimum flux adjustment fuzzy control

  20. Induction motor drive system for low-power applications

    Microsoft Academic Search

    C. B. Jacobina; M. B. de Rossiter Correa; E. R. C. da Silva; A. M. N. Lima

    1999-01-01

    This paper investigates the utilization of three different configurations of induction motor drives to implement low-cost systems for low-power applications. The static power converter side is implemented by a single-phase rectifier cascaded with a four-switch inverter. Three different types of induction machines are supplied with the static power converter. In the first configuration, a standard three-phase induction machine is employed.

  1. Identification of Plant Model of Linear Induction Motors for Traction System

    NASA Astrophysics Data System (ADS)

    Nozaki, Yuichiro; Koseki, Takafumi

    A linear induction motor (LIM) is suitable for use in trains; the motor can be used in both wheel-suspended and contact-less types such as Linear Metro and HSST trains in Japan. The LIM has the end winding as well as asymmetrical winding. The end-effect is a major problem in the LIM, and it makes the analysis, design, and control of motors difficult. In this paper, the combination method of numerical analysis and equivalent circuit of the LIM is described in order to design a high-performance controller of the LIM includeing the end effect. A sample basic field-oriented control scheme that is based on the plant model is applied to the LIM in order to check the control performance; the theory of rotary induction motor is used for the verification.

  2. Soft Computing Application in Fault Detection of Induction Motor

    SciTech Connect

    Konar, P.; Puhan, P. S.; Chattopadhyay, P. Dr. [Electrical Engineering Department, BESUS, Shibpur (India)

    2010-10-26

    The paper investigates the effectiveness of different patter classifier like Feed Forward Back Propagation (FFBPN), Radial Basis Function (RBF) and Support Vector Machine (SVM) for detection of bearing faults in Induction Motor. The steady state motor current with Park's Transformation has been used for discrimination of inner race and outer race bearing defects. The RBF neural network shows very encouraging results for multi-class classification problems and is hoped to set up a base for incipient fault detection of induction motor. SVM is also found to be a very good fault classifier which is highly competitive with RBF.

  3. Robust DSP-based efficiency optimization of a variable speed induction motor drive

    Microsoft Academic Search

    Slobodan N. Vukosavic; Emil Levi

    2003-01-01

    This paper proposes a practical digital-signal-processor (DSP)-based algorithm for the online efficiency optimization of induction motor drives. The algorithm combines good features of the search control and loss-model-based control, while simultaneously eliminating their major drawbacks. It ensures very fast convergence without the need for any a priori knowledge of the motor loss-related parameters. The minimum loss operating point is decided

  4. Design of a position servo with induction motor using self-tuning regulator and Kalman filter

    Microsoft Academic Search

    Mauricio de Campos; Emerson Giovani Caratti; H. A. Grundling

    2000-01-01

    This paper presents a position servomechanism with an induction motor, based on a self-tuning controller. The Kalman filter is used to observe the disturbance load torque and a RELS (recursive extended least squares) method is used to identify the mechanical parameters of the system such as total moment of inertia and nominal viscous friction coefficient. The controllers of the electric

  5. Analytical and experimental study of high phase order induction motors

    NASA Technical Reports Server (NTRS)

    Klingshirn, Eugene A.

    1989-01-01

    Induction motors having more than three phases were investigated to determine their suitability for electric vehicle applications. The objective was to have a motor with a current rating lower than that of a three-phase motor. The name chosen for these is high phase order (HPO) motors. Motors having six phases and nine phases were given the most attention. It was found that HPO motors are quite suitable for electric vehicles, and for many other applications as well. They have characteristics which are as good as or better than three-phase motors for practically all applications where polyphase induction motors are appropriate. Some of the analysis methods are presented, and several of the equivalent circuits which facilitate the determination of harmonic currents and losses, or currents with unbalanced sources, are included. The sometimes large stator currents due to harmonics in the source voltages are pointed out. Filters which can limit these currents were developed. An analysis and description of these filters is included. Experimental results which confirm and illustrate much of the theory are also included. These include locked rotor test results and full-load performance with an open phase. Also shown are oscillograms which display the reduction in harmonic currents when a filter is used with the experimental motor supplied by a non-sinusoidal source.

  6. Online search based fuzzy optimum efficiency operation in steady and transient states for DC and AC vector controlled motors

    Microsoft Academic Search

    E. S. Sergaki; G. S. Stavrakakis

    2008-01-01

    This paper presents an efficiency optimization control system which can be incorporated as an outer loop to a standard indirect vector speed control system for both AC and DC motor drives (i.e. Induction motor, Permanent Magnet Synchronous motor, Synchronous Reluctance motor and DC motor drives), when not operating at full load. The proposed control system adjusts the air-gap current space

  7. SISTEMA DE INSTRUMENTACION VIRTUAL PARA UN MOTOR DE INDUCCION (Virtual Instrumentation System for Induction Motor)

    Microsoft Academic Search

    Jesus A. Calderon-Vielma; Jose G. Contreras; Pedro O. Mora; Adolfo J. Rodr

    The objective of the present work is to design and implement a virtual instrumentation system, using a personal computer, as a measurement tool that allows to carry the necessary measurements to obtain the induction motor operation characteristics such as: voltage, current, speed, power, power factor and torque. The variables of the motor are obtained by transducers (measure transformers and tacogenerators).

  8. High speed linear induction motor efficiency optimization

    E-print Network

    Johnson, Andrew P. (Andrew Peter)

    2005-01-01

    One of the reasons linear motors, a technology nearly a century old, have not been adopted for a large number of linear motion applications is that they have historically had poor efficiencies. This has restricted the ...

  9. Novel high speed induction motor for a commercial centrifugal compressor

    Microsoft Academic Search

    W. L. Soong; G. B. Kliman; R. N. Johnson; R. White; J. Miller

    1999-01-01

    This paper describes the electrical, mechanical and metallurgical design, construction and testing of a novel, low-cost, high-speed, high-efficiency induction motor to drive a new type of small centrifugal compressor in industrial cooling applications. The 28 shaft HP, 50 krpm motor features a unique laminated rotor with a multi-function, high-strength copper alloy cage brazed with a novel process. Relatively thin, high-silicon

  10. Transistorized PWM Inverter-Induction Motor Drive System

    Microsoft Academic Search

    Steven C. Peak; Allan B. Plunkett

    1983-01-01

    The development of a transistorized pulsewidth modulated (PWM) inverter-induction motor traction drive system is described. A vehicle performance analysis was performed to establish the vehicle tractive effort-speed requirements. These requirements were then converted into a set of inverter and motor specifications. The inverter was a transistorized three-phase bridge using General Electric power Darlington transistors. The description of the design and

  11. Coupling an induction motor type generator to ac power lines. [making windmill generators compatible with public power lines

    NASA Technical Reports Server (NTRS)

    Nola, F. J. (inventor)

    1984-01-01

    A system for coupling an induction motor type generator to an A.C. power line includes an electronic switch means that is controlled by a control system and is regulated to turn on at a relatively late point in each half cycle of its operation. The energizing power supplied by the line to the induction motor type generator is decreased and the net power delivered to the line is increased.

  12. Term selection for an induction motor via nonlinear Lasso

    NASA Astrophysics Data System (ADS)

    Rasouli, Mohammad

    2014-05-01

    In this paper, a commonly used third-order model of an induction motor with eight parameters is analyzed in order to classify the model parameters based on their degree of significance in the model behavior. Using the results of this classification, only the significant parameters of an induction motor need to be estimated from the measurements. The remainder of the parameters can be replaced by their typical values, which results in an optimization problem with a reduced dimension. The reduced parameter model needs less computation time and thus is better suited for real-time applications. The significance of this approach is greater when many induction motors or dynamic inductive loads in the system need to be identified. A nonlinear Least absolute shrinkage and selection operator (Lasso) term selection method is employed for this study. The Lasso method minimizes the sum of squared errors, with a constraint on the L1 norm of the parameter vector, which is used to push some parameters to zero. The main idea, when using this method for nonlinear models, involves incorporating the Lasso constraint in an iterative solution approach such as Gauss-Newton algorithm. This method reduces the variance of the parameter estimates, and simplifies the interpretation of the model. To evaluate the performance of the proposed algorithm, the parameters of an induction motor are estimated. Estimation is performed both for simulated and experimental data. The results of the proposed approach are compared to those of a method based on sensitivity analysis.

  13. Implementation of DSP Based Cost Effective Inverter Fed Induction Motor Drive with VisSim

    NASA Astrophysics Data System (ADS)

    Mohanty, Nalin K.; Muthu, Ranganath

    2012-03-01

    The implementation of a Digital Signal Processor (DSP) based high-performance cost effective fed Induction Motor drive with VisSim/Embedded Controls Developer (ECD) is presented in this paper. In the experimental work VisSim/ECD software automatically converts the in built block diagram to C code and compiles, links, and downloads the code to DSP processor TMS320F2812. The DSP processor generates the required PWM to a cost effective ie four switch 3-phase (FSTPI) inverter. The power circuit of FSTPI fed drive system consists of an IGBT based FSTPI bridge inverter module feeding to a 5 hp three-phase squirrel cage induction motor. In this work the speed of induction motor output is shown by the GUI of VisSim/ECD and SPWM pulses, line voltages and line current output curves are shown using digital storage oscilloscope to demonstrate the feasibility of the system.

  14. Remote control for motor vehicle

    NASA Technical Reports Server (NTRS)

    Johnson, Dale R. (Inventor); Ciciora, John A. (Inventor)

    1984-01-01

    A remote controller is disclosed for controlling the throttle, brake and steering mechanism of a conventional motor vehicle, with the remote controller being particularly advantageous for use by severely handicapped individuals. The controller includes a remote manipulator which controls a plurality of actuators through interfacing electronics. The remote manipulator is a two-axis joystick which controls a pair of linear actuators and a rotary actuator, with the actuators being powered by electric motors to effect throttle, brake and steering control of a motor vehicle adapted to include the controller. The controller enables the driver to control the adapted vehicle from anywhere in the vehicle with one hand with minimal control force and range of motion. In addition, even though a conventional vehicle is adapted for use with the remote controller, the vehicle may still be operated in the normal manner.

  15. Formal Derivation of Direct Torque Control for Induction Machines

    Microsoft Academic Search

    Zakdy Sorchini; Philip T. Krein

    2006-01-01

    Direct torque control (DTC) is an induction motor control technique that has been successful because it explicitly considers the inverter stage and uses few machine parameters, while being more robust to parameter uncertainty than field-oriented control (FOC). This paper presents a formal derivation of DTC based on singular perturbation and nonlinear control tools. The derivation elaborates an explicit relationship between

  16. A novel stopping method for induction motors operating from variable frequency drives

    Microsoft Academic Search

    Mahesh M. Swamy; T. J. Kume; Y. Yukihira; Shuichi Fujii; M. Sawamura

    2004-01-01

    Many applications involving induction motors that are controlled using variable frequency drives require the ability to stop quickly. These applications include emergency stops, quick stopping of fans, centrifuges, presses, etc. The technique that is widely accepted in the industry for achieving quick stopping makes use of brake resistors in series with a power semiconductor switch. The switch-resistor combination (brake-unit) is

  17. A matrix converter without reactive clamp elements for an induction motor drive system

    Microsoft Academic Search

    Axel Schuster

    1998-01-01

    The paper describes the design of a microcomputer controlled matrix converter for an induction motor drive system. Special emphasis is given to the current commutation eliminating the need for any capacitor-based clamp circuit in the steady state operation and during the shutdown. Simulation results and experimental results are presented

  18. Control of a bidirectional Z-Source Inverter for hybrid electric vehicles in motoring, regenerative braking and grid interface operations

    Microsoft Academic Search

    Omar Ellabban; Joeri Van Mierlo; Philippe Lataire

    2010-01-01

    This paper presents a battery supplying a bidirectional Z-Source Inverter (ZSI) feeding a three phase induction motor. The indirect field-oriented control (IFOC) method is used to control the induction motor speed during motoring and regenerative braking operations. The IFOC is implemented based on PWM voltage modulation with voltage decoupling compensation. A dual loop controller is designed, based on a small

  19. Fault Detection and Protection of Induction Motors Using Sensors

    Microsoft Academic Search

    Ramazan Bayindir; I. Sefa; I. Colak; Askin Bektas

    2008-01-01

    Protection of an induction motor (IM) against possible problems, such as overvoltage, overcurrent, overload, overtemperature, and undervoltage, occurring in the course of its operation is very important, because it is used intensively in industry as an actuator. IMs can be protected using some components, such as timers, contactors, voltage, and current relays. This method is known as the classical method

  20. Analytical calculation of the switched reluctance motor's unaligned inductance

    Microsoft Academic Search

    Arthur Radun

    1999-01-01

    This paper develops an analytical model for the unaligned inductance of the switched reluctance motor. The analytical model is useful as long as the machine's stator and rotor poles do not overlap and its iron does not saturate. Iron saturation is almost never experienced when the rotor is in the unaligned position for practical winding currents. This paper expands on

  1. Effects of slot combination on acoustic noise from induction motors

    Microsoft Academic Search

    Takashi Kobayashi; Fumio Tajima; Motoya Ito; Suetaro Shibukawa

    1997-01-01

    The electromagnetic force due to slot combination has a strong influence on acoustic noise from induction motors. When both the vibration mode and natural frequency of the stator correspond to those of the electromagnetic force, the stator causes a resonance which results in a loud noise. Therefore, it is necessary to estimate accurately the electromagnetic force before acoustic noise can

  2. A novel induction motor starting method using superconduction

    NASA Astrophysics Data System (ADS)

    Silva, F. B. B.; Orlando, M. T. D.; Fardin, J. F.; Simonetti, D. S.; Baldan, C. A.

    2014-12-01

    In this paper, an alternative method for starting up induction motors is proposed, taking into account experimental measurements. The new starting current limitation method is based on using a high-temperature superconductor. A prototype of the superconducting starting current limiter was constructed with a commercially available second-generation high-temperature superconductor YBCO tape, and this was tested with a 55-kW industrial induction motor in a 440-V/60-Hz three-phase power grid. Performance evaluations of the superconducting limiter method (applied to startup of the induction motor) were performed and were compared with a direct-on-line starter and an electronic soft starter. In addition, a computational model was developed and used for electromagnetic torque analysis of the system. As significant characteristics, our method offers the ability to limit the starting current of the induction motor with greater electromagnetic torque, reduced current waveform distortion and therefore lower harmonic pollution during startup when compared to the soft starter method.

  3. Equivalent Circuits for Single-Sided Linear Induction Motors

    Microsoft Academic Search

    Wei Xu; Jian Guo Zhu; Yongchang Zhang; Zixin Li; Yaohua Li; Yi Wang; Youguang Guo; Yongjian Li

    2010-01-01

    Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, particularly in the intermediate speed range. This is because they have merits, such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius, and flexible road line. The theory of operation for these

  4. Close up of backup exciter showing induction motor at left ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Close up of backup exciter showing induction motor at left and direct current generator at right. View to west - Mystic Lake Hydroelectric Facility, Powerhouse, Along West Rosebud Creek, 1 3/4 miles northeast of Mystic Lake Dam, Fishtail, Stillwater County, MT

  5. Demonstration of Lenz's Law with an Induction Motor

    ERIC Educational Resources Information Center

    Kraftmakher, Yaakov

    2005-01-01

    The interaction of a conductor with a time-dependent magnetic field is an important topic of electromagnetic theory. A computerized classroom demonstration shows how the eddy currents induced in the rotor of an induction motor cause its rotation or braking. Both phenomena are directly related to Lenz's law.

  6. Application of the matrix converter to induction motor drives

    Microsoft Academic Search

    Takayoshi Matsuo; Steffen Bernet; R. S. Colby; T.A. Lipo

    1996-01-01

    This paper presents the technical issues of applying the matrix power converter to field-oriented induction motor drives. A newly developed matrix power converter switching sequence combination is described in detail, the purpose of which is to minimize harmonic components of the matrix power converter input currents. It is demonstrated that small size capacitors work efficiently as input filters. Matrix power

  7. Torque control for electric motors

    NASA Technical Reports Server (NTRS)

    Bernard, C. A.

    1980-01-01

    Method for adjusting electric-motor torque output to accomodate various loads utilizes phase-lock loop to control relay connected to starting circuit. As load is imposed, motor slows down, and phase lock is lost. Phase-lock signal triggers relay to power starting coil and generate additional torque. Once phase lock is recoverd, relay restores starting circuit to its normal operating mode.

  8. Induction Motors Bearing Failures Detection and Diagnosis: Park and Concordia Transform

    E-print Network

    Boyer, Edmond

    Induction Motors Bearing Failures Detection and Diagnosis: Park and Concordia Transform Approaches with the problem of bearing failure detection and diagnosis in induction motors. Indeed, bearings deterioration and compared. Experimental tests, on a 0.75-kW two-pole induction motor with artificial bearing damages

  9. The Research and Development Platform for Wind Energy System Used Induction Motor Replacing Wind Turbine

    Microsoft Academic Search

    Ming Qiao; Fei Lin; Ruixiang Hao; Xiaojie You; Trillion Q Zheng

    2007-01-01

    A research platform for wind energy system is developed in this paper. An inverter fed induction motor drive the wind generator replacing a real wind turbine. The power-speed characteristics of a wind turbine are physically implemented by an induction motor drive. For a given wind turbine characteristics, the shaft torque of induction motor is calculated by the given wind speed

  10. A model of double star induction motors under rotor bar defect for diagnosis purpose

    Microsoft Academic Search

    H. Razik; G. Didier; T. Lubin; C. R. da Silva; A. W. Mascarenhas; C. B. Jacobina; A. M. N. Lima; E. R. C. da Silva

    2005-01-01

    This paper investigates the modelling of a double star induction motor when this one operates under rotor fault. A special attention is paid only to the rotor defect. The use of double star induction motors or six-phase induction motors is increasing and we can find it in high power process. Its main advantage lies in most reliability in case of

  11. RBFN Based Efficiency Optimization Method of Induction Motor Utilized in Electrically Driven Marine Propellers

    NASA Astrophysics Data System (ADS)

    Supari; Syafaruddin; Negara, I. Made Yulistya; Ashari, Mochamad; Hiyama, Takashi

    Thruster controllers of electric propulsion system with fixed pitch propellers are conventionally aimed to control only the shaft speed without utilizing the capabilities of the controllers to apply any other control strategies. In fact, the dynamic operating conditions lead to the fluctuation of motor load. For this reason, utilizing conventional controllers is hard enough due to the critical constraints and limitation of the ship power source. The paper presents study and analysis of efficiency optimization strategy in thruster shaft speed controllers driven by induction motor. The control strategy based on intelligent method called radial basis function neural network (RBFN) is implemented. A set of training data derived from a loss model controller of the induction motor working under indirect field-oriented-control (IFOC) drives is used for training process of RBFN. The loss model controller utilizes schematically the flux generating current as controlling variable. Estimation of the flux generating current through the RBFN process shows significant improvement in motor efficiency especially for low speed and ship transit system.

  12. The Use of Small Voltage Vectors of Matrix Converters in Direct Torque Control of Induction Machines

    Microsoft Academic Search

    Carlos Ortega; Antoni Arias; Josep Ballcells; Cedric Caruanat; Cyril Spiterit; Joseph Ciliat

    2006-01-01

    The effects on torque performance when using small voltage vectors of Matrix Converters is investigated in this paper. These vectors are used in order to reduce the electromagnetic torque ripple which appears when Direct Torque Control technique is used in Induction Motors. Direct Torque Control for Induction Motors using Matrix Converters is reviewed and it is pointed out the problem

  13. Precision stop control for motors

    NASA Technical Reports Server (NTRS)

    Howard, David E. (Inventor); Montenegro, Justino (Inventor)

    2000-01-01

    An improved stop control system and method are provided for a motor having a drive mechanism in which the motor is coupled to a motor controller that controls the speed and position of the drive mechanism using a first signal indicative of a commanded position of the drive mechanism, a second signal indicative of the actual speed of the drive mechanism and a third signal indicative of the actual position of the drive mechanism. The improved system/method uses a first circuit that receives the first and third signal and generates an error signal indicative of a difference therebetween. A second circuit receives the error signal and compares same with a threshold position error. The result of this comparison is used to selectively supply the second signal (i.e., speed) to the motor controller at least whenever the error signal is less than the threshold position error so that the motor controller can use the second signal in conjunction with the third signal to stop the motor.

  14. Advances in vector control of ac motor drives — A review

    Microsoft Academic Search

    A K Chattopadhyay

    1997-01-01

    This paper attempts to present a comprehensive review of the advances made in vector control or field orientation as applied\\u000a to high performanceac motor drives. Brief application survey, machine models ind-q representation, implementation issues with inverters and cycloconverters, parameter effects etc for both induction and synchronous\\u000a motor vector control are dealt with and sample results from studies on them are

  15. A Method of Sensing Line Voltages for Parameter Adaptation of Inverter-Fed Induction Motor Servo Drives

    Microsoft Academic Search

    R. Krishnan; Frank C. Doran

    1987-01-01

    Most high-performance inverter-fed induction motor drive systems require signals corresponding to the input voltages of the motor for parameter adaptation. Low-performance systems require the signals for stabilization. The voltage signals are used in the controller circuit and therefore require isolation. Isolation of the voltage signals is not a cost-effective solution in low-power motor drive systems. The fact that the base

  16. The pulsed linear induction motor concept for high-speed trains

    Microsoft Academic Search

    B. N. Turman; B. M. Marder; G. J. Rohwein; D. P. Aeschliman; J. B. Kelley; M. Cowan; R. M. Zimmerman

    1995-01-01

    The SERAPBIM (SEgmented RAil PHased Induction Motor) concept is a linear induction motor concept which uses rapidly-pulsed magnetic fields and a segmented reaction rail, as opposed to low-frequency fields and continuous reaction rails found in conventional linear induction motors. These improvements give a high-traction, compact, and efficient linear motor that has potential for advanced high speed rail propulsion. In the

  17. Neuro-Fuzzy Controller of a Sensorless PM Motor Drive For Washing Machines

    E-print Network

    machines have been replaced with belt-driven induction motors with tachometer feedback, digital controlNeuro-Fuzzy Controller of a Sensorless PM Motor Drive For Washing Machines Kasim M. Al towards the adoption of direct drive washing machines utilizing PM motors is increasing due

  18. Levitation and torque control of internal permanent magnet type bearingless motor

    Microsoft Academic Search

    Yohji Okada; Shigenobu Miyamoto; Tetsuo Ohishi

    1996-01-01

    A general solution for levitation control applicable to permanent magnet (PM) synchronous and induction type rotating motors is presented. Levitation force is generated by the superposition of P+2 or P-2 pole magnetic flux with the usual motoring magnetic flux (pole number P). PM synchronous motors have the advantage that the control of rotation and levitation are independent, however, the levitation

  19. Sensorless Control of Induction Machines—With or Without Signal Injection?

    Microsoft Academic Search

    Joachim Holtz

    2006-01-01

    Controlled induction motor drives without mechanical speed sensors at the motor shaft have the attractions of low cost and high reliability. To replace the sensor, information on the rotor speed is extracted from measured stator currents and from voltages at motor terminals. Vector-controlled drives require estimating the magnitude and spatial orientation of the fundamental magnetic flux waves in the stator

  20. Lightweight type linear induction motor and its characteristics

    SciTech Connect

    Osawa, S.; Yoshimuro, M.; Karita, M.; Ebihara, D.; Yokoi, T.

    1994-08-01

    At the Institute for Posts and Telecommunications Policy, a postal transportation system has been studied. This system would make use of linear induction motor (LIM)-driven vehicles for transporting mail between post offices in the Tokyo Metropolitan area. The system would connect the main post offices in the Tokyo area with tunnels circularly constructed underground and would transport mail with linear induction motor-driven vehicles. In this study, it is found that if vehicle weight is reduced, climbing capability could be considerably improved. Accordingly, the potential for reducing the weight of vehicle-mounted LIMs has been explored, and a prototype lightweight LIM has been manufactured. This paper reports on the lightweight LIM and its characteristics. 8 refs.

  1. A high-power MEMS electric induction motor

    Microsoft Academic Search

    Carol Livermore; Anthony R. Forte; Theodore Lyszczarz; Stephen D. Umans; Arturo A. Ayon; Jeffrey H. Lang

    2004-01-01

    An electric induction micromotor with a 4-mm-diameter rotor was designed and built for high-power operation. Operated at partial actuating voltage, the motor has demonstrated an air gap power in excess of 20 mW and torque of 3.5 ?Nm at speeds in excess of 55 000 rpm. Operation at higher power and speed was limited by bearing stability at higher rotational

  2. Speed sensorless field orientation control of the induction machine

    Microsoft Academic Search

    H. Tajima; Y. Hori

    1991-01-01

    A speed estimation method is proposed for an induction machine and its application to the flux observer based field orientation (FOFO) control system is discussed. The motor speed is estimated based on the difference between two flux estimators. Its convergence performance is estimated and the authors propose an assignment method. The speed estimator is applied to the FOFO controller. Experiments

  3. Evaluation of quasi-square wave inverter as a power source for induction motors

    NASA Technical Reports Server (NTRS)

    Guynes, B. V.; Haggard, R. L.; Lanier, J. R., Jr.

    1977-01-01

    The relative merits of quasi-square wave inverter-motor technology versus a sine wave inverter-motor system were investigated. The empirical results of several tests on various sizes of wye-wound induction motors are presented with mathematical analysis to support the conclusions of the study. It was concluded that, within the limitations presented, the quasi-square wave inverter-motor system is superior to the more complex sine wave system for most induction motor applications in space.

  4. Three phase AC motor controller

    DOEpatents

    Vuckovich, Michael (Elizabeth, PA); Wright, Maynard K. (Bethel Park, PA); Burkett, John P. (South Huntington Township, Westmoreland County, PA)

    1984-03-20

    A motor controller for a three phase AC motor (10) which is adapted to operate bidirectionally from signals received either from a computer (30) or a manual control (32). The controller is comprised of digital logic circuit means which implement a forward and reverse command signal channel (27, 29) for the application of power through the forward and reverse power switching relays (16, 18, 20, 22). The digital logic elements are cross coupled to prevent activation of both channels simultaneously and each includes a plugging circuit (65, 67) for stopping the motor upon the removal of control signal applied to one of the two channels (27, 29) for a direction of rotation desired. Each plugging circuit (65, 67) includes a one-shot pulse signal generator (88, 102) which outputs a single pulse signal of predetermined pulsewidth which is adapted to inhibit further operation of the application of power in the channel which is being activated and to apply a reversal command signal to the other channel which provides a reversed phase application of power to the motor for a period defined by the pulse-width output of the one-shot signal generator to plug the motor (10) which will then be inoperative until another rotational command signal is applied to either of the two channels.

  5. Use of a variable frequency motor controller to drive AC motor pumps on aircraft hydraulic systems

    SciTech Connect

    Motamed, F. [Martin Marietta Control Systems, Johnson City, NY (United States)

    1995-12-31

    This paper describes the development of a 20 kva Variable Frequency Motor Controller (VFMC) and its application to AC motor driven hydraulic pumps on aircraft. VFMC laboratory and iron bird testing has demonstrated: accommodation of variable frequency AC power (300--800Hz) to drive conventional fixed frequency induction motors, reduction of motor start inrush currents by 65% via soft starts, and reduction of AC motor pump electrical power demand by as much as 62% through power-on-demand control. As the VFMC transitions from technology demonstrator to flight qualified hardware, topics such as power quality, thermal management, electromagnetic compatibility, and system reliability have become more prominent, and the paper addresses their impact on the future direction of the VFMC.

  6. Development of a cryogenic induction motor for use with a superconducting magnetic bearing

    E-print Network

    Oxley, Paul

    Development of a cryogenic induction motor for use with a superconducting magnetic bearing Tomotake of a superconducting magnetic bearing (SMB). Both the motor and the SMB are operated at liquid He temperatures. We give Keywords: Astrophysical polarimeter; Induction motor; Superconducting magnetic bearings 1. Introduction

  7. High Gain Observer for Induction Motor in Presence of Magnetic Hysteresis , L. Dugard3

    E-print Network

    Paris-Sud XI, Université de

    High Gain Observer for Induction Motor in Presence of Magnetic Hysteresis H. Ouadi1 , F. Giri2 , L in induction motors is considered in this paper. In most previous works, motor observers have been designed using standard models, neglecting the saturation and hysteretic effects in the machine magnetic circuit

  8. On-line parameter identification of linear induction motor based on adaptive observer

    Microsoft Academic Search

    Liming Shi; Ke Wang; Yaohua Li

    2007-01-01

    Due to the existence of end-effects and the changing operational conditions, the parameters of linear induction motor (LIM) are variable. In this paper, model reference adaptive method is applied to the parameter identification of linear induction motor. Based on the proposed method, the magnetizing inductance and secondary resistance, which are both the most variable in the equivalent circuit of LIM

  9. Induction Motor Drive with Reduced Speed Range

    Microsoft Academic Search

    Werner Leonhard

    \\u000a Some mechanical loads, such as fans or centrifugal pumps, exhibit a strong dependence of the load torque on speed, so that\\u000a a limited speed control range suffices for achieving the desired effect. The same is true for rotating converters employing\\u000a a flywheel, Sect. 7.4; since the kinetic energy of the rotating masses varies with the square of the speed, there

  10. Tuning the stator resistance of induction motors using artificial neural network

    SciTech Connect

    Cabrera, L.A.; Elbuluk, M.E.; Husain, I. [Univ. of Akron, OH (United States). Dept. of Electrical Engineering] [Univ. of Akron, OH (United States). Dept. of Electrical Engineering

    1997-09-01

    Tuning the stator resistance of induction motors is very important, especially when it is used to implement direct torque control (DTC) in which the stator resistance is a main parameter. In this paper, an artificial network (ANN) is used to accomplish tuning of the stator resistance of an induction motor. The parallel recursive prediction error and backpropagation training algorithms were used in training the neural network for the simulation and experimental results, respectively. The neural network used to tune the stator resistance was trained on-line, making the DTC strategy more robust and accurate. Simulation results are presented for three different neural-network configurations showing the efficiency of the tuning process. Experimental results were obtained for the one of the three neural-network configuration. Both simulation and experimental results showed that the ANN have tuned the stator resistance in the controller to track actual resistance of the machine.

  11. Detection of stator short circuit faults in three-phase induction motors using motor current zero crossing instants

    Microsoft Academic Search

    Abhisek Ukil; Shuo Chen; Andrea Andenna

    2011-01-01

    Stator faults typically have a significant share amongst the common type of faults in industrial three-phase induction (asynchronous) motors. This paper presents a motor current signature analysis (MCSA)-based diagnostics of the stator winding short circuit fault. This type of fault happens due to the destruction of the turn insulation, and can be very detrimental causing motor shutdown. Instead of traditional

  12. A true four quadrant matrix converter induction motor drive with servo performance

    Microsoft Academic Search

    S. Sunter; Jon C. Clare

    1996-01-01

    This paper describes the development of a 2.5 kW high performance vector controlled induction motor servo drive with true four-quadrant capability employing a matrix converter power circuit. The advantages of this system over the conventional rectifier-inverter arrangement are: capability for regeneration into the utility grid, sinusoidal supply currents and minimum passive components. Solutions to the special problems associated with the

  13. A Novel Method for Improving Overload Capability of Stand-alone Power System Based on a Flywheel Induction Motor

    NASA Astrophysics Data System (ADS)

    Cheng, Miao-Miao; Kato, Shuhei; Sumitani, Hideo; Shimada, Ryuichi

    Stand-alone power systems are widely used in islands and remote areas. With the rapid advances in the new energy technology, stand-alone power systems have got a rapid development. However, their overload capability is very poor. In this paper, a novel method to improve the overload performance of the stand-alone power system is proposed by using a flywheel induction motor. The flywheel induction motor is composed of a flywheel disk connected to a squirrel cage induction motor. It is controlled to supply the overload power of the stand-alone power supply by charging and discharging. The proposed system is characterized by the following three points: 1) Simple configuration; The flywheel induction motor is directly connected to the inverter-controlled load without any converters. 2) Simple frequency control; The expected active power flow is realized by a small change of the stand-alone power side inverter's output frequency. 3) Low cost system; A decreased power capacity demand for the stand-alone power supply is realized by adding a low cost flywheel induction motor. Experimental results are provided to verify the proposed system.

  14. MAGNETIC COUPLING BETWEEN DC TACHOMETER AND MOTOR AND ITS EFFECT ON MOTION CONTROL

    E-print Network

    Awtar, Shorya

    MAGNETIC COUPLING BETWEEN DC TACHOMETER AND MOTOR AND ITS EFFECT ON MOTION CONTROL Shorya Awtar that takes into account the effect of magnetic coupling in a DC motor-tachometer assembly. Magnetic coupling mutual inductance between the tachometer winding and motor winding. This magnetic coupling phenomenon

  15. Motor Controller System For Large Dynamic Range of Motor Operation

    NASA Technical Reports Server (NTRS)

    Howard, David E. (Inventor); Alhorn, Dean C. (Inventor); Smith, Dennis A. (Inventor); Dutton, Kenneth R. (Inventor); Paulson, Mitchell Scott (Inventor)

    2006-01-01

    A motor controller system uses a rotary sensor with a plurality of signal conditioning units, coupled to the rotary sensor. Each of these units, which is associated with a particular range of motor output shaft rotation rates, generate a feedback signal indicative of the position of the motor s output shaft. A controller (i) converts a selected motor output shaft rotation rate to a corresponding incremental amount of rotational movement for a selected fixed time period, (ii) selects, at periodic completions of the selected fixed time period, the feedback signal from one of the signal conditioning units for which the particular range of motor output shaft rotation rates associated therewith encompasses the selected motor output shaft rotation rate, and (iii) generates a motor drive signal based on a difference between the incremental amount of rotational movement and the feedback signal from the selected one of the signal conditioning Units.

  16. Speed sensorless field-orientation control of the induction machine

    Microsoft Academic Search

    Hirokazu Tajima; Yoichi Hori

    1993-01-01

    A speed estimation method for an induction machine and its application to a flux observer-based field orientation (FOFO) control system proposed previously is presented. The motor speed is estimated on the basis of the difference between two flux estimators. The convergence of the method is analyzed, and a novel pole assignment method is proposed. The speed estimator is applied to

  17. NASTRAN buckling study of a linear induction motor reaction rail

    NASA Technical Reports Server (NTRS)

    Williams, J. G.

    1973-01-01

    NASTRAN was used to study problems associated with the installation of a linear induction motor reaction rail test track. Specific problems studied include determination of the critical axial compressive buckling stress and establishment of the lateral stiffness of the reaction rail under combined loads. NASTRAN results were compared with experimentally obtained values and satisfactory agreement was obtained. The reaction rail was found to buckle at an axial compressive stress of 11,400 pounds per square inch. The results of this investigation were used to select procedures for installation of the reaction rail.

  18. Diagnostics of DC and Induction Motors Based on the Analysis of Acoustic Signals

    NASA Astrophysics Data System (ADS)

    Glowacz, A.

    2014-10-01

    In this paper, a non-invasive method of early fault diagnostics of electric motors was proposed. This method uses acoustic signals generated by electric motors. Essential features were extracted from acoustic signals of motors. A plan of study of acoustic signals of electric motors was proposed. Researches were carried out for faultless induction motor, induction motor with one faulty rotor bar, induction motor with two faulty rotor bars and flawless Direct Current, and Direct Current motor with shorted rotor coils. Researches were carried out for methods of signal processing: log area ratio coefficients, Multiple signal classification, Nearest Neighbor classifier and the Bayes classifier. A pattern creation process was carried out using 40 samples of sound. In the identification process 130 five-second test samples were used. The proposed approach will also reduce the costs of maintenance and the number of faulty motors in the industry.

  19. Sensorless FOC Performance Improved with On-Line Speed and Rotor Resistance Estimator Based on an Artificial Neural Network for an Induction Motor Drive.

    PubMed

    Gutierrez-Villalobos, Jose M; Rodriguez-Resendiz, Juvenal; Rivas-Araiza, Edgar A; Martínez-Hernández, Moisés A

    2015-01-01

    Three-phase induction motor drive requires high accuracy in high performance processes in industrial applications. Field oriented control, which is one of the most employed control schemes for induction motors, bases its function on the electrical parameter estimation coming from the motor. These parameters make an electrical machine driver work improperly, since these electrical parameter values change at low speeds, temperature changes, and especially with load and duty changes. The focus of this paper is the real-time and on-line electrical parameters with a CMAC-ADALINE block added in the standard FOC scheme to improve the IM driver performance and endure the driver and the induction motor lifetime. Two kinds of neural network structures are used; one to estimate rotor speed and the other one to estimate rotor resistance of an induction motor. PMID:26131677

  20. Motorized control for mirror mount apparatus

    DOEpatents

    Cutburth, Ronald W. (Tracy, CA)

    1989-01-01

    A motorized control and automatic braking system for adjusting mirror mount apparatus is disclosed. The motor control includes a planetary gear arrangement to provide improved pitch adjustment capability while permitting a small packaged design. The motor control for mirror mount adjustment is suitable for laser beam propagation applications. The brake is a system of constant contact, floating detents which engage the planetary gear at selected between-teeth increments to stop rotation instantaneously when the drive motor stops.

  1. An Approach of Condition Monitoring of Induction Motor Using MCSA

    Microsoft Academic Search

    Neelam Mehla; Ratna Dahiya

    2007-01-01

    Abstract—With the industrial growth, it has become necessary to monitor, the condition of the machine\\/system. Electrical machine being the most sensitive part has great importance,for the researcher to monitor the faults diagnosis. Three phase squirrel cage motor is normally use for industrial purposes. Various techniques are used to control the speed such as DTC (Direct Torque Control), Vector Control, Close

  2. Study and harmonic analysis of SVPWM techniques for VSI-Fed double-star induction motor drive

    Microsoft Academic Search

    Khoudir Marouani; Farid Khoucha; Lotfi Baghli; Djafar Hadiouche; Abdelaziz Kheloui

    2007-01-01

    In this paper, a comparison between continuous and discontinuous space vector PWM control of six-phase VSI fed a double-star induction motor drive (DSIM) is presented. The induction machine has two sets of three-phase stator windings spatially shifted by 30 electrical degrees. Each set of three-phase stator windings is fed by a three-phase inverter. The harmonic characteristics of the VSI feeding

  3. Models for Bearing Damage Detection in Induction Motors Using Stator Current Monitoring

    E-print Network

    Paris-Sud XI, Université de

    Models for Bearing Damage Detection in Induction Motors Using Stator Current Monitoring Martin Bl of rolling-element bearing faults on induction motor stator cur- rent. Bearing problems are one major cause for drive failures. Their detection is possible by vibration monitoring of charac- teristic bearing

  4. Induction Motors Bearing Failures Detection and Diagnosis Using a RBF ANN Park Pattern Based Method

    E-print Network

    Paris-Sud XI, Université de

    Induction Motors Bearing Failures Detection and Diagnosis Using a RBF ANN Park Pattern Based Method of bearing failure detection and diagnosis in induction motors. The proposed approach is a sensor to automate the fault detection and diagnosis process. Experimental tests with artificial bearing damages

  5. A nonlinear least-squares approach for identification of the induction motor parameters

    Microsoft Academic Search

    Kaiyu Wang; John Chiasson; Marc Bodson; Leon M. Tolbert

    2005-01-01

    A nonlinear least-squares method is presented for the identification of the induction motor parameters. A major difficulty with the induction motor is that the rotor state variables are not available measurements so that the system identification model cannot be made linear in the parameters without overparametrizing the model. Previous work in the literature has avoided this issue by making simplifying

  6. Detection of Broken Rotor Bars in Induction Motor Using Derivative Free Kalman Filters

    Microsoft Academic Search

    S. Kumar; J. Prakash

    2011-01-01

    This paper deals with design and implementation of Joint Unscented Kalman filter (JUKF) and Dual Unscented Kalman filter (DUKF) for the detection and monitoring of rotor bar faults in induction motor under simulation studies. A broken rotor bar essentially leads to an increase in rotor resistance of the induction motor. The methodology used is basically model based fault detection in

  7. Digital servo motion control of air motors

    Microsoft Academic Search

    J. PU; P. R. MOORE; R. H. WESTON

    1991-01-01

    Aspects of the operating characteristics of pneumatic systems are given and control methods for pneumatic servo motors are described. Both analytical and experimental approaches are considered. The results show that digital-controlled air motors have the potential of providing an alternative solution to their electric and hydraulic motor counterparts. Air servo motors, through inherent low cost, good power-to-weight ratio and intrinsically

  8. Vectorial Command of Induction Motor Pumping System Supplied by a Photovoltaic Generator

    NASA Astrophysics Data System (ADS)

    Makhlouf, Messaoud; Messai, Feyrouz; Benalla, Hocine

    2011-01-01

    With the continuous decrease of the cost of solar cells, there is an increasing interest and needs in photovoltaic (PV) system applications following standard of living improvements. Water pumping system powered by solar-cell generators are one of the most important applications. The fluctuation of solar energy on one hand, and the necessity to optimise available solar energy on the other, it is useful to develop new efficient and flexible modes to control motors that entrain the pump. A vectorial control of an asynchronous motor fed by a photovoltaic system is proposed. This paper investigates a photovoltaic-electro mechanic chain, composed of a PV generator, DC-AC converter, a vector controlled induction motor and centrifugal pump. The PV generator is forced to operate at its maximum power point by using an appropriate search algorithm integrated in the vector control. The optimization is realized without need to adding a DC-DC converter to the chain. The motor supply is also ensured in all insolation conditions. Simulation results show the effectiveness and feasibility of such an approach.

  9. Self-tuning control of a switched-reluctance motor drive with shaft position sensor

    Microsoft Academic Search

    Piyush Tandon; Anandan Velayutham Rajarathnam; Mehrdad Ehsani

    1997-01-01

    The control of the switched-reluctance motor (SRM) is usually based on the inductance profiles as a function of position. This paper addresses the problem of obtaining optimal performance from an SRM in the presence of parameter variation, which can alter the phase inductance profiles. The operation of an SRM drive in the controlled current mode from zero to base speed

  10. Failure identification and analysis for high-voltage induction motors in the petrochemical industry

    Microsoft Academic Search

    Olav Vaag Thorsen; Magnus Dalva

    1999-01-01

    This paper gives a synopsis of condition monitoring methods, both as a diagnostic tool and as a technique for failure identification in high-voltage induction motors in industry. New operating experience data for 483 motor units consisting of 6135 unit years are registered and processed statistically to ascertain the connection between motor data, protection and condition monitoring methods, maintenance philosophy and

  11. Transient security assessment of the China Southern Power Grid considering induction motor loads

    Microsoft Academic Search

    J. S. Zhang; Y. Zhang; X. H. Zong; Z. G. Wu

    2006-01-01

    The impacts of induction motor load models, mechanical load characteristics, motor load percentages and motor undervoltage tripping and reconnection relay on the transient security assessment (TSA) of the China Southern Power Grid after large disturbances are examined using a transient security assessment tool in this paper. The results show that the first order mechanical model gives more optimistic TSA than

  12. Identification of eccentricity related-faults characteristic frequencies in induction motors using a programmable power source

    Microsoft Academic Search

    Oscar Duque-Perez; Daniel Morinigo-Sotelo; Marcelo Perez-Alonso; Alicia Rodriguez-Carrascal; Luis A. Garcia-Escudero

    2011-01-01

    ) Abstract - With the aim of developing an expert system for condition monitoring of cage rotor induction motors fed by power inverters, laboratory tests have been performed on a motor with artificially created eccentricity in order to identify as many fault signatures as possible. The technique used to detect faults is Motor Current Signature Analysis and in this paper

  13. Learning from neural control in motor systems

    Microsoft Academic Search

    Tengfei Liu; Cong Wang

    2007-01-01

    Tremendous efforts have been made to interpret the learning mechanism of motor systems. Based on the experimental results, this paper presents a biologically-plausible computational model for motor learning and control system by using a newly developed deterministic learning theory. In the computational model, the localized Gaussian neural network is employed. By analyzing the properties of the network structure, motor learning

  14. Aquino P., Feemster M., Dawson D. M. and Behal A., "Adaptive Partial State Feedback Control of the Induction Motor: Elimination of Rotor Flux and Rotor Velocity

    E-print Network

    Leuenberger, Michael N.

    2000 Aquino P., Feemster M., Dawson D. M. and Behal A., "Adaptive Partial State Feedback Control-8. Feemster M., Dawson D. M, Aquino P., and Behal A., "A Global Exponential Output- Feedback Controller

  15. Transient effects of PWM ASDs on standard squirrel cage induction motors

    SciTech Connect

    Melhorn, C.J.; Tang, L. [Electrotek Concepts, Inc., Knoxville, TN (United States)

    1995-12-31

    With the advances in semi-conductor devices, adjustable speed drives (ASDs) have become more prevalent than ever before in industrial and commercial processes. Many facilities are installing ASDs to improve the efficiency of their processes and to increase the control of their processes. While the effects of ASDs on the power system are well known, many engineers and systems integrators are not aware of the effects that ASDs can have on the motor that is driven by the drive. This paper describes the techniques used to measure, analyze, and simulate the problems associated with the use of PWM ASDs to drive induction motors. Measures to mitigate these problems are also discussed. The Electro-Magnetic Transients Program (EMTP) is used to simulate the phenomena, compare results against measurements, and evaluate mitigation techniques.

  16. Pain relativity in motor control.

    PubMed

    Kurniawan, I T; Seymour, B; Vlaev, I; Trommershäuser, J; Dolan, R J; Chater, N

    2010-06-01

    Motivational theories of pain highlight its role in people's choices of actions that avoid bodily damage. By contrast, little is known regarding how pain influences action implementation. To explore this less-understood area, we conducted a study in which participants had to rapidly point to a target area to win money while avoiding an overlapping penalty area that would cause pain in their contralateral hand. We found that pain intensity and target-penalty proximity repelled participants' movement away from pain and that motor execution was influenced not by absolute pain magnitudes but by relative pain differences. Our results indicate that the magnitude and probability of pain have a precise role in guiding motor control and that representations of pain that guide action are, at least in part, relative rather than absolute. Additionally, our study shows that the implicit monetary valuation of pain, like many explicit valuations (e.g., patients' use of rating scales in medical contexts), is unstable, a finding that has implications for pain treatment in clinical contexts. PMID:20435952

  17. Design of the Stepper Motor Controller

    Microsoft Academic Search

    Bo Qu; Hong Lin

    \\u000a The basic working principle of the stepper motor and its controlling method are introduced in this paper. The performance\\u000a of the microprocessor STM32F103RBT6 and the driving principle of stepper motor driver chip L6208 are analyzed. A new type\\u000a of stepper motor controller is designed. The input plus of the driver IC is provided by direct digital frequency synthesizer\\u000a (DDS) chip.

  18. An extended electromotive force model for sensorless control of interior permanent-magnet synchronous motors

    Microsoft Academic Search

    Zhiqian Chen; Mutuwo Tomita; Shinji Doki; Shigeru Okuma

    2003-01-01

    During the last decade, many sensorless control methods have been proposed for surface permanent-magnet synchronous motors (SPMSMs) based on the estimation of electromotive force (EMF) in which the motor's position information is contained. However, these methods cannot be applied to interior PMSMs (IPMSMs) directly, because the position information is contained in not only the EMF, but also the inductance of

  19. The Analysis of Induction Machines Controlled by Series Connected Semiconductor Switches

    Microsoft Academic Search

    Donald Novotny; A. F. Fath

    1968-01-01

    The widespread interest in applying semiconductor switching elements to induction motor speed control has created. a need for a fast and accurate means of predicting motor performance under the unconventional excitation inherent in these systems. In many cases this excitation takes the form of alternate periods of normal sine-wave excitation and periods of open-circuit operation. This paper presents an analytic

  20. DC motor driven robotic manipulator control

    Microsoft Academic Search

    S. C. Won; D. J. Lim; D. H. Chyung

    1985-01-01

    A controller design for a dc motor driven robotic manipulator is presented. The main difficulties are caused by the Coulomb frictions, disturbance due to the gravitational pull and the rather stiff spring effect of the link between the drive motor and the manipulator arm. The objective is to design a feedback controller which ensures zero steady state positioning error. It

  1. Microcomputer speed control of stepper motor

    Microsoft Academic Search

    C. Chen

    1982-01-01

    This paper describes the application of a microcomputer as a programmed speed control for a stepper motor. The microcomputer is used as a variable frequency square wave generator, and a digital driving circuit is designed to transform the square wave into a useful sequential driving waveform. The digital driving circuit, speed control program, and computation of motor speed are explained

  2. Microstepping Mode for Stepper Motor Control

    Microsoft Academic Search

    Gheorghe BALUTA

    2007-01-01

    The paper presents a high performance system for stepper motor control in a microstepping mode, which was designed and performed with a L292 specialized integrated circuits, made by SGS-THOMSON, Microelectronics Company. The microstepping control system improves the positioning accuracy and eliminates low speed ripple and resonance effects in a stepper motor electrical drive.

  3. Advanced dc-Traction-Motor Control System

    NASA Technical Reports Server (NTRS)

    Vittone, O.

    1985-01-01

    Motor-control concept for battery-powered vehicles includes stateof-the-art power-transistor switching and separate excitation of motor windings in traction and regenerative braking. Switching transistors and other components of power-conditioning subsystem operate under control of computer that coordinates traction, braking, and protective functions.

  4. An improved DTC strategy for induction motor control fed by a multi-cell voltage source inverter for high power applications

    Microsoft Academic Search

    C. A. Martins; T. A. Meynard; X. Roboam; A. S. Carvalho

    1998-01-01

    Voltage-source inverters are generally composed of only one switching cell per phase. The classical direct torque control (DTC) technique for this kind of inverter has well known advantages, but may not be used in high power systems due to the high frequency that this technique typically requires. The present work deals with the use of a multi-cell voltage-source inverter controlled

  5. Method and apparatus for controlling multiple motors

    SciTech Connect

    Jones, R.G.; Kortegaard, B.L.; Jones, D.F.

    1986-07-22

    A method and apparatus are provided for simultaneously controlling a plurality of stepper motors. Addressing circuitry generates address data for each motor in a periodic address sequence. Memory circuits respond to the address data for each motor by accessing a corresponding memory location containing a first operational data set functionally related to a direction for moving the motor, speed data, and rate of speed change. First logic circuits respond to the first data set to generate a motor step command. Second logic circuits respond to the command from the first logic circuits to generate a third data set for replacing the first data set in memory with a current operational motor status, which becomes the first data set when the motor is next addressed.

  6. Propulsive characteristics of a novel linear hybrid motor with both induction and synchronous operations

    SciTech Connect

    Jeon, W.J.; Katoh, S.; Iwamoto, T.; Kamiya, Y.; Onuki, T.

    1999-09-01

    This paper treats a novel linear hybrid motor (LHM) by both induction and synchronous operations. The proposed motor consists of one pair of linear synchronous motors (LSMs) and a linear induction motor (LIM). The primary-cores of both LSM and LIM have a common ring winding, and the secondary solid-conductor is arranged in both LIM and the interpole space of LSM. The feature of the motor is that the undesirable vertical force in LSM is offset by the symmetrical double-sided construction and the secondary is capable of self-starting by induction operation. From the investigation by the three-dimensional finite element analysis and experiment, the authors derive an optimal exciting condition for starting, and then verify that the proposed LHM is effective for practical use.

  7. Detection of outer raceway bearing defects in small induction motors using stator current analysis

    Microsoft Academic Search

    ?zzet Y. önel; K. Burak Dalci; ?brahim Senol

    2005-01-01

    We investigate the application of induction motor stator current spectral analysis (MCSA) for detection of rolling element\\u000a bearing damage from the outer raceway. In this work, MCSA and vibration analysis are applied to induction motor to detect\\u000a outer raceway defects in faulty bearings. Data acquisition, recording, and fast fourier transform (FFT) algorithms are done\\u000a by using the Lab VIEW programming

  8. Application of a 5500 RPM high speed induction motor and drive in a 7000 HP natural gas compressor installation

    Microsoft Academic Search

    S. C. LaGrone; M. C. Griggs; M. Bressani

    1992-01-01

    The reasons for the selection, and considerations in the implementation, of high-speed induction motors and variable-frequency drives for a compressor station in an unmanned installation on a gas pipeline are presented. The selection options relevant to the application are reviewed: gas turbine versus motor driver, high-speed motor versus conventional motor, and induction versus synchronous motor. Design features of the major

  9. Method and apparatus for controlling multiple motors

    SciTech Connect

    Jones, R.G.; Kortegaard, B.L.; Jones, D.F.

    1987-08-25

    A motor control system is described for sequentially controlling stepper motors, including: addressing means for generating address data for each motor in a periodic address sequence; memory means responsive to the address data for each motor for accessing a memory location corresponding to the address data, the memory location containing a first data set functionally related to a direction for moving the motor, a number of steps remaining to move the motor, a speed for moving the number of steps, and a rate of change for the speed; first logic circuits for inputting the first data set and for outputting a second data set for commanding the motor to make a single step in a determined direction after a number of the periodic addresses; second logic circuits for inputting the second data set and for outputting a third data set functionally related to a status of the motor is response to the second data set; and means for replacing the first data set with the third data set in the memory at the location corresponding to the address of the motor, the third data set becoming the first data set at a next periodic addressing of the motor.

  10. Experimental implementation of a robust damped-oscillation control algorithm on a full-sized, two-degree-of-freedom, AC induction motor-driven crane

    Microsoft Academic Search

    R. L. Kress; J. F. Jansen; M. W. Noakes

    1994-01-01

    When suspended payloads are moved with an overhead crane, pendulum like oscillations are naturally introduced. This presents a problem any time a crane is used, especially when expensive and\\/or delicate objects are moved, when moving in a cluttered and\\/or hazardous environment, and when objects are to be placed in tight locations. Damped-oscillation control algorithms have been demonstrated over the past

  11. Structured attachment of bacterial molecular motors for defined microflow induction

    NASA Astrophysics Data System (ADS)

    Woerdemann, Mike; Hörner, Florian; Denz, Cornelia

    2014-01-01

    Bacterial rotational motor complexes that propel flagellated bacteria possess unique properties like their size of a few nanometres and the ability of selfreproduction that have led to various exciting applications including biohybrid nano-machines. One mandatory prerequisite to utilize bacterial nano motors in fluid applications is the ability to transfer force and torque to the fluid, which usually can be achieved by attachment of the bacterial cell to adequate surfaces. Additionally, for optimal transfer of force or torque, precise control of the position down to the single cell level is of utmost importance. Based on a PIV (particle image velocimetry) evaluation of the induced flow of single bacteria,we propose and demonstrate attachment of arbitrary patterns of motile bacterial cells in a fast light-based two-step process for the first time to our knowledge. First, these cells are pre-structured by holographic optical tweezers and then attached to a homogeneous, polystyrene-coated surface. In contrast to the few approaches that have been implemented up to now and which rely on pre-structured surfaces, our scheme allows for precise control on a single bacterium level, is versatile, interactive and has low requirements with respect to the surface preparation.

  12. Medial wall motor areas and skeletomotor control.

    PubMed

    Dum, R P; Strick, P L

    1992-12-01

    The results of recent studies in primates provide convincing evidence that the cortex on the medial wall of the hemisphere contains multiple areas concerned with the generation and control of body movement. Highlights of these findings include the demonstration that each of these motor areas has substantial direct projections to the spinal cord, somatotopically organized projections to the primary motor cortex, a 'motor' map, revealed by intracortical stimulation, and neuronal activity that precedes trained hand movements. PMID:1477548

  13. Motor torque compensation of an induction electric motor by adjusting a slip command during periods of supposed change in motor temperature

    DOEpatents

    Kelledes, William L. (Brighton, MI); St. John, Don K. (Livonia, MI)

    1992-01-01

    The present invention maintains constant torque in an inverter driven AC induction motor during variations in rotor temperature. It is known that the torque output of a given AC induction motor is dependent upon rotor temperature. At rotor temperatures higher than the nominal operating condition the rotor impedance increases, reducing the rotor current and motor torque. In a similar fashion, the rotor impedance is reduced resulting in increased rotor current and motor torque when the rotor temperature is lower than the nominal operating condition. The present invention monitors the bus current from the DC supply to the inverter and adjusts the slip frequency of the inverter drive to maintain a constant motor torque. This adjustment is based upon whether predetermined conditions implying increased rotor temperature or decreased rotor temperature exist for longer that a predetermined interval of time.

  14. Performance of Feedforward Current Regulators for Field-Oriented Induction Machine Controllers

    Microsoft Academic Search

    Robert D. Lorenz; Donald B. Lawson

    1987-01-01

    To achieve instantaneous control of induction motor torque using field-orientation techniques, it is necessary that the phase currents be controlled to maintain precise instantaneous relationships. Failure to do so results in a noticeable degradation in torque response. Most of the currently used approaches to achieve this control employ classical control strategies which are only correct for steady-state conditions. A modern

  15. Re-adhesion control of electric motor coach based on disturbance observer and sensor-less vector control

    Microsoft Academic Search

    Satoshi Kadowaki; Kiyoshi Ohishi; Ichiro Miyashita; Shinobu Yasukawa

    2002-01-01

    When the adhesion force coefficient between rail and driving wheel decreases, the electric motor coach has slip phenomena. We have already proposed the anti-slip re-adhesion control system based on a disturbance observer. This system has the fine torque response for one driving wheel driven by one inverter-fed induction motor. However, the bogie of an electric motor coach has four driving

  16. Fourier analysis of motor current for diagnosis of broken bars in squirrel-cage induction machines

    Microsoft Academic Search

    Mohammad Rezazadeh Mehrjou; Norman Mariun; Mohammad Hamiruce Marhaban; Norhisam Misron

    2010-01-01

    Condition monitoring, signal processing and data analysis are the key parts of the induction machine (IM) fault detection scheme. Frequency analysis of the signal acquired through the condition monitoring is commonly applied for motor fault detection. This paper is intended to investigate the ability and effectiveness of Fourier analysis of motor current for broken rotor bar detection. Accordingly, the current

  17. Detection of broken outer cage bars for double cage induction motors under the startup transient

    Microsoft Academic Search

    Jose Antonino-Daviu; Martin Riera-Guasp; Joan Pons-Llinares; Sang Bin Lee; Jiyoon Yoo; Christian Kral

    2011-01-01

    Unlike single cage rotor fault detection, FFT- based steady state spectrum analysis techniques can fail to detect outer cage faults in double cage induction motors due to the small outer cage current under running conditions. Double cage motors are typically employed in applications that require loaded starts. This makes the outer cage vulnerable to fatigue failure since it must withstand

  18. A review of induction motors signature analysis as a medium for faults detection

    Microsoft Academic Search

    Mohamed El Hachemi Benbouzid

    2000-01-01

    This paper is intended as a tutorial overview of induction motors signature analysis as a medium for fault detection. The purpose is to introduce in a concise manner the fundamental theory, main results, and practical applications of motor signature analysis for the detection and the localization of abnormal electrical and mechanical conditions that indicate, or may lead to, a failure

  19. Leakage current reduction for a high-frequency carrier inverter feeding an induction motor

    Microsoft Academic Search

    Y. Murai; T. Kubota; Y. Kawase

    1992-01-01

    A PWM inverter with an induction motor often has a problem with a leakage current that flows through the distributed electrostatic capacitance from the motor windings to the ground. The authors present an analytical model of the system with leakage current and the strategy to suppress it. Two types of suppression circuit are discussed. The current-type circuit, although compact in

  20. FPGA-Based Online Detection of Multiple Combined Faults in Induction Motors Through Information Entropy and Fuzzy Inference

    Microsoft Academic Search

    Rene J. Romero-Troncoso; Ricardo Saucedo-Gallaga; Eduardo Cabal-Yepez; Arturo Garcia-Perez; Roque A. Osornio-Rios; Ricardo Alvarez-Salas; Homero Miranda-Vidales; Nicolas Huber

    2011-01-01

    The development of monitoring systems for rotating machines is the ability to accurately detect different faults in an incipient state. The most popular rotating machine in industry is the squirrel-cage induction motor, and the failure on such motors may have severe consequences in costs, product quality, and safety. Most of the condition-monitoring techniques for induction motors focus on a single

  1. Estimation of Induction Motor Operating Power Factor From Measured Current and Manufacturer Data

    Microsoft Academic Search

    Abhisek Ukil; Richard Bloch; Andrea Andenna

    2011-01-01

    Three-phase induction (asynchronous) motors (IM) are industrial work-horses, making the protection of IM a very im- portant topic. IM protection devices typically monitor the motor current and\\/or voltage to provide the motor protection function- alities like current overload, over\\/under voltage, etc. One of the interesting parameters to monitor is the operating power factor (PF) of the IM, which provides better

  2. Smart Technique for Induction Motors Diagnosis by Monitoring the Power Factor Using Only the Measured Current

    Microsoft Academic Search

    R A Shnibha; A S Albarabar

    2012-01-01

    This paper is concerned with accurate, early and reliable induction motor IM fault detection and diagnosis using an enhanced power parameter measurement technique. IM protection devices typically monitor the motor current and\\/or voltage to provide the motor protection from e.g. current overload, over\\/under voltage, etc. One of the interesting parameters to monitor is the operating power factor (PF) of the

  3. Rotor fault detection system for inverter driven induction motor using currents signal

    Microsoft Academic Search

    N. H. Kim; M. H. Kim; H. A. Toliyat; S. H. Lee; C. H. Choi; W. S. Baik

    2007-01-01

    In this paper, the induction motor rotor fault diagnosis system using current signals which are measured using axis-transformation method is presented. In inverter-fed motor drives unlike line-driven motor drives the stator currents are rich in harmonics and therefore fault diagnosis using stator current is not trivial. The current signals for rotor fault diagnosis need precise and high resolution information, which

  4. Finite-Element Transient Analysis of Induction Motors Under Mixed Eccentricity Fault

    Microsoft Academic Search

    Jawad Faiz; Bashir Mahdi Ebrahimi; Bilal Akin; Hamid A. Toliyat

    2008-01-01

    In a three-phase squirrel-cage induction motor, eccentricity is a common fault that can make it necessary to remove the motor from the production line. However, because the motor may be inaccessible, diagnosing the fault is not easy. We have developed a time-stepping finite-element method (FEM) that identifies mixed eccentricity (a combination of static and dynamic) by analysis, without direct access

  5. Microcomputer Control of Switched Reluctance Motor

    Microsoft Academic Search

    Bimal K. Bose; Timothy J. E. Miller; Paul M. Szczesny; William H. Bicknell

    1986-01-01

    A microcomputer-based four-quadrant control system of a switched reluctance motor is described. The control was implemented with a speed feedback loop, a torque feedback loop, and both the torque and speed feedback loops combined. In addition the controller incorporates a startup operation, sequencing, and synchronized angle steering control. The angle controller was designed using dedicated digital hardware, whereas the other

  6. Servo and Motor Controller Date: August 10, 2004

    E-print Network

    Virginia Tech

    Servo and Motor Controller Date: August 10, 2004 Description: The servo motor controller drives/off an Allegro A3936 three-phase PWM motor driver. The servo controller regulates the shaft velocityF252) R/C Servo R/C Servo R/C Servo PWM motor Driver (A3936) 3-Phase Brushless Motor Quadrature

  7. Making them move: Motor control for animated

    E-print Network

    Panne, M. van de

    Making them move: Motor control for animated humans and animals Michiel van de Panne Department of Computer Science University of Toronto 1 Abstract Simulating the motion of humans and animals by the goal of creating simulated autonomous characters equipped with basic motor skills for movement

  8. Oscillation control system for electric motor drive

    DOEpatents

    Slicker, James M. (Union Lake, MI); Sereshteh, Ahmad (Union Lake, MI)

    1988-01-01

    A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify thetorque commands applied to the motor.

  9. Sensorless control of hybrid stepper motor

    Microsoft Academic Search

    M. Bendjedia; Y. Ait-Amirat; B. Walther; A. Berthon

    2007-01-01

    Today thanks to low cost and high performance DSP's, Kalman filtering (KF) becomes an efficient candidate to avoid mechanical sensors in motor control. We present in this work experimental results by using a steady state KF method to estimate the speed and rotor position for hybrid stepper motor. With this method the computing time is reduced. The Kalman gain is

  10. Stator current-based sensorless vibration monitoring of induction motors

    Microsoft Academic Search

    Caryn M. Riley; Brian K. Lin; Thomas G. Habetler; Gerald B. Kliman

    1997-01-01

    This paper presents an initial study into the relationship between vibration and current harmonics of electric motors, including the effect of externally induced vibrations. This relationship was investigated experimentally on both new motors, on a vibration stand and on a motor with berating wear. Both theory and experimental results show that a change in the RMS value of the stator

  11. Fault Detection and Diagnosis of Induction Motors Using Motor Current Signature Analysis and a Hybrid FMM–CART Model

    Microsoft Academic Search

    Manjeevan Seera; Chee Peng Lim; Dahaman Ishak; Harapajan Singh

    2012-01-01

    In this paper, a novel approach to detect and classify comprehensive fault conditions of induction motors using a hybrid fuzzy min–max (FMM) neural network and classification and regression tree (CART) is proposed. The hybrid model, known as FMM–CART, exploits the advantages of both FMM and CART for undertaking data classification and rule extraction problems. A series of real experiments is

  12. Experimental Study on a Voltage Source Inverter-fed Induction Motor Traction System Connected to Fuel Cell

    NASA Astrophysics Data System (ADS)

    Furuya, Takemasa; Kondo, Keiichiro; Yamamoto, Takamitsu

    This paper describes the experimental results of a test to drive two induction motors through a VVVF inverter by 25kW class proton membrane type fuel cells (PEMFCs). The experiments are aimed at verifying the compatibility between the drive system for the railway vehicle traction and FCs. This paper describes test results of powering, powering-off procedure, and simulated slip-readhesion control test, respectively. Through the experiments, we obtained useful knowledge required in designing the fuel cell drive system.

  13. Reluctance network analysis of an orthogonal-core type parametric induction motor

    SciTech Connect

    Tajima, Katsubumi; Sato, Kohei; Komukai, Toshihiko; Ichinokura, Osamu

    1999-09-01

    In this paper, an analytical method of an orthogonal-core type parametric induction motor is proposed, based on a reluctance network model of the stator. The model is derived by a similar technique applied to an orthogonal-core transformer. Using this model the parametric oscillation characteristic of the motor, without a rotor, is computed. The simulation results agree well with the experiments. It is obvious that the analytical model of the stator presented here is proper for analysis of the motor and that, by use of this model and suitable analytical model of the rotor, the motor characteristics can be analyzed.

  14. DSP Implementation of Field Oriented control of Hybrid Stepper Motor

    Microsoft Academic Search

    M. Bendjedia; Y. Ait-Amirat; B. Walther; A. Berthon

    The stepper motors can be driven by digital and open-loop control. This is the basic advantage of stepper motors over other types of motors. This simple control shows a poor dynamic performance. The stepper motors are widely used in precise motions which require a high dynamic. However an open loop speed control is insufficient, so a closed loop control is

  15. Design method of a simplified speed observer for speed sensorless F.O. induction motor drives working at low speed in 4-quadrant mode

    Microsoft Academic Search

    F. Profumo; G. Griva; A. Tenconi; M. Abrate; M. ChiadO Caponet

    1998-01-01

    In this paper, a design method for a simplified speed observer for a speed sensorless field oriented (F.O.) controlled induction motor drive is proposed. The method is based on the stability analysis of the drive operation, on the torque vs. speed plane. A decoupling control is used to generate the voltage commands from the current commands instead of current regulators.

  16. Calculation and Measurement of Coil Inductance Profile in Tubular Linear Reluctance Motor and its Validation by Three Dimensional FEM

    NASA Astrophysics Data System (ADS)

    Mosallanejad, Ali; Shoulaie, Abbas

    2011-07-01

    This paper reports a study of coil inductance profile in all positions of plunger in tubular linear reluctance motors (TLRMs) with open type magnetic circuits. In this paper, maximum inductance calculation methods in winding of tubular linear reluctance motors are described based on energy method. Furthermore, in order to calculate the maximum inductance, equivalent permeability is measured. Electromagnetic finite-element analysis for simulation and calculation of coil inductance in this motor is used. Simulation results of coil inductance calculation using 3-D FEM with coil current excitation is compared to theoretical and experimental results. The comparison yields a good agreement.

  17. Motor Control STEVEN P. WISE

    E-print Network

    Shadmehr, Reza

    to that of an agonist. central pattern generator Neural network in the central nervous system that produces rhythmic. internal model A central nervous system representation of the kinematics and dynamics of a motor task throughout the central nervous system (CNS), includ- ing the cerebral cortex, basal ganglia, cerebellum

  18. Road load simulator tests of the Gould phase 1 functional model silicon controlled rectifier ac motor controller for electric vehicles

    Microsoft Academic Search

    F. Gourash

    1984-01-01

    The test results for a functional model ac motor controller for electric vehicles and a three-phase induction motor which were dynamically tested on the Lewis Research Center road load simulator are presented. Results show that the controller has the capability to meet the SAE-J227a D cycle test schedule and to accelerate a 1576-kg (3456-lb) simulated vehicle to a cruise speed

  19. Motor feedback speed control by utilizing the motor feeder cable as a communication channel

    Microsoft Academic Search

    A. Kosonen; M. Jokinen; V. Sarkimaki; J. Ahola; M. Niemela

    2006-01-01

    A feedback loop is used in the motor speed control in order to transmit the measured motor rotational speed information to the controller. The implementation of the feedback loop requires cabling between the motor and the frequency converter both for signalling and powering. However, the motor power cables could be also used for data transmission. The possibility of using the

  20. Method and apparatus for large motor control

    DOEpatents

    Rose, Chris R. (Santa Fe, NM); Nelson, Ronald O. (White Rock, NM)

    2003-08-12

    Apparatus and method for providing digital signal processing method for controlling the speed and phase of a motor involves inputting a reference signal having a frequency and relative phase indicative of a time based signal; modifying the reference signal to introduce a slew-rate limited portion of each cycle of the reference signal; inputting a feedback signal having a frequency and relative phase indicative of the operation of said motor; modifying the feedback signal to introduce a slew-rate limited portion of each cycle of the feedback signal; analyzing the modified reference signal and the modified feedback signal to determine the frequency of the modified reference signal and of the modified feedback signal and said relative phase between said modified reference signal and said modified feedback signal; and outputting control signals to the motor for adjusting said speed and phase of the motor based on the frequency determination and determination of the relative phase.

  1. Improved transistorized AC motor controller for battery powered urban electric passenger vehicles

    NASA Technical Reports Server (NTRS)

    Peak, S. C.

    1982-01-01

    An ac motor controller for an induction motor electric vehicle drive system was designed, fabricated, tested, evaluated, and cost analyzed. A vehicle performance analysis was done to establish the vehicle tractive effort-speed requirements. These requirements were then converted into a set of ac motor and ac controller requirements. The power inverter is a three-phase bridge using power Darlington transistors. The induction motor was optimized for use with an inverter power source. The drive system has a constant torque output to base motor speed and a constant horsepower output to maximum speed. A gear shifting transmission is not required. The ac controller was scaled from the base 20 hp (41 hp peak) at 108 volts dec to an expanded horsepower and battery voltage range. Motor reversal was accomplished by electronic reversal of the inverter phase sequence. The ac controller can also be used as a boost chopper battery charger. The drive system was tested on a dynamometer and results are presented. The current-controlled pulse width modulation control scheme yielded improved motor current waveforms. The ac controller favors a higher system voltage.

  2. Improved transistorized AC motor controller for battery powered urban electric passenger vehicles

    NASA Astrophysics Data System (ADS)

    Peak, S. C.

    1982-09-01

    An ac motor controller for an induction motor electric vehicle drive system was designed, fabricated, tested, evaluated, and cost analyzed. A vehicle performance analysis was done to establish the vehicle tractive effort-speed requirements. These requirements were then converted into a set of ac motor and ac controller requirements. The power inverter is a three-phase bridge using power Darlington transistors. The induction motor was optimized for use with an inverter power source. The drive system has a constant torque output to base motor speed and a constant horsepower output to maximum speed. A gear shifting transmission is not required. The ac controller was scaled from the base 20 hp (41 hp peak) at 108 volts dec to an expanded horsepower and battery voltage range. Motor reversal was accomplished by electronic reversal of the inverter phase sequence. The ac controller can also be used as a boost chopper battery charger. The drive system was tested on a dynamometer and results are presented. The current-controlled pulse width modulation control scheme yielded improved motor current waveforms. The ac controller favors a higher system voltage.

  3. Magnetic Suspension Force in an Induction Bearingless Motor with a Squirrel Cage Rotor

    NASA Astrophysics Data System (ADS)

    Katou, Tatsuya; Chiba, Akira; Fukao, Tadashi

    Theoretical equations of magnetic force in an induction bearingless motor have been reported. In the bearingless motor, both 4-pole and 2-pole windings are stored in stator slots for torque and suspension force generation. In the analysis, squirrel cage rotor currents are considered. These currents are induced by both torque and suspension winding currents. Inductance matrix is represented by four sets of three-phase windings, thus 12×12 matrix is constructed. A simplification and reasonable assumptions are introduced to obtain understandable expressions for suspension force and torque representation. The rotor flux linkages in an induction bearingless motor are derived, and then, simulation model of suspension force is constructed. It is shown that the response and the phase of suspension force are delayed in a case of cage rotors.

  4. Theoretical analysis of a YBCO squirrel-cage type induction motor based on an equivalent circuit

    NASA Astrophysics Data System (ADS)

    Morita, G.; Nakamura, T.; Muta, I.

    2006-06-01

    A HTS induction motor, with a HTS squirrel-cage rotor, is analysed using an electrical equivalent circuit. The squirrel-cage winding in the rotor consists of rotor bars and end rings, and both are considered to be made of YBCO film conductors. A wide range of electric field versus current density in YBCO film is formulated based on the Weibull function, and analysed as a non-linear resistance in the equivalent circuit. It is shown that starting and accelerating torques of the HTS induction motor are improved drastically compared to those of a conventional induction motor. Furthermore, large synchronous torque can also be realized by trapping the magnetic flux in the rotor circuit because of the persistent current mode.

  5. Development and fundamental characteristics of a YBCO superconducting induction/synchronous motor operated in liquid nitrogen

    NASA Astrophysics Data System (ADS)

    Nagao, K.; Nakamura, T.; Nishimura, T.; Ogama, Y.; Kashima, N.; Nagaya, S.; Suzuki, K.; Izumi, T.; Shiohara, Y.

    2008-01-01

    A high Tc superconducting induction/synchronous motor (HTS-ISM) is designed, fabricated and tested with the use of YBCO coated conductors for rotor bars. The structure of this motor is the same with that of the squirrel-cage induction motor. The YBCO coated conductor, 10 mm in width, is produced by means of the MOCVD process, and then such tape is divided into four pieces by using a laser cutting machine. Four cut tapes are bundled for one rotor bar, and commercialized Bi-2223/Ag tapes are utilized for end rings. The fabricated HTS rotor is installed in a conventional stator, and then various tests are carried out in liquid nitrogen. It is successfully observed that the fabricated YBCO HTS-ISM has a synchronous torque. The motor also has an almost constant torque curve because of the steep take-off of the electric field versus current density property. Detailed test results are reported and discussed.

  6. Dual-Three Phase Induction Machine Drives Control—A Survey

    NASA Astrophysics Data System (ADS)

    Bojoi, Radu; Farina, Francesco; Profumo, Francesco; Tenconi, Alberto

    The paper aims to perform an overview on the state-of-the-art in the control of multi-phase drives employing dual-three phase induction machines. In particular, the paper is focused on modeling aspects, Pulse-Width Modulation (PWM) techniques for Voltage Source Inverters (VSI), Field Oriented Control (FOC) and Direct Torque Control (DTC) strategies for dual-three phase induction machines. Furthermore, the paper briefly presents the advantages of dual-three phase induction motor drives over the conventional three-phase drives and the different applications reported in the literature.

  7. ROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS

    Microsoft Academic Search

    SZABÓ Loránd

    The condition monitoring of the electrical machines can significantly reduce the costs of maintenance by allowing the early detection of faults, which could be expensive to repair. In this paper some results on non-invasive detection of broken rotor bars in squirrel-cage induction motors are presented. The applied method is the so-called motor current signature analysis (MCSA) which utilises the results

  8. Novel high-speed induction motor for a commercial centrifugal compressor

    Microsoft Academic Search

    Wen L. Soong; Gerald B. Kliman; Roger N. Johnson; Raymond A. White; Joseph E. Miller

    2000-01-01

    This paper describes the electrical, mechanical and metallurgical design, construction, and testing of a novel low-cost high-speed high-efficiency induction motor to drive a new type of small centrifugal compressor in industrial cooling applications. The 28-shaft-hp 50-kr\\/min motor features a unique laminated rotor with a multifunction high-strength copper-alloy cage brazed with a novel process. Relatively thin high-silicon steel laminations were used

  9. A drive system with high-speed single-phase supplied three-phase induction motor

    Microsoft Academic Search

    T. Binkowski; M. Grad; M. Latka; W. Malska; D. Sobczynski

    2008-01-01

    Use of high-speed three-phase induction motors supplied through electronic power converters from single-phase network in electric drive systems used in household appliances and power tools is proposed. Such solution would result in reduction of motor weight and thus the mass of the whole drive system, possibility to regulate (set) the rotation rate within wide range, and, most importantly, increase of

  10. Spinal metaplasticity in respiratory motor control.

    PubMed

    Fields, Daryl P; Mitchell, Gordon S

    2015-01-01

    A hallmark feature of the neural system controlling breathing is its ability to exhibit plasticity. Less appreciated is the ability to exhibit metaplasticity, a change in the capacity to express plasticity (i.e., "plastic plasticity"). Recent advances in our understanding of cellular mechanisms giving rise to respiratory motor plasticity lay the groundwork for (ongoing) investigations of metaplasticity. This detailed understanding of respiratory metaplasticity will be essential as we harness metaplasticity to restore breathing capacity in clinical disorders that compromise breathing, such as cervical spinal injury, motor neuron disease and other neuromuscular diseases. In this brief review, we discuss key examples of metaplasticity in respiratory motor control, and our current understanding of mechanisms giving rise to spinal plasticity and metaplasticity in phrenic motor output; particularly after pre-conditioning with intermittent hypoxia. Progress in this area has led to the realization that similar mechanisms are operative in other spinal motor networks, including those governing limb movement. Further, these mechanisms can be harnessed to restore respiratory and non-respiratory motor function after spinal injury. PMID:25717292

  11. 18. Station Service Control and Motor Control Center #2, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Station Service Control and Motor Control Center #2, view to the northeast. Note the circuit breaker switch on cart in left corner of photograph. This switch is part of the motor control center which has been temporarily removed from the slot marked with a tag that is visible at lower left end of control center. - Washington Water Power Clark Fork River Noxon Rapids Hydroelectric Development, Powerhouse, South bank of Clark Fork River at Noxon Rapids, Noxon, Sanders County, MT

  12. Application of adaptive neuro fuzzy inference system on the development of the observer for speed sensor less induction motor

    Microsoft Academic Search

    Era Purwanto; Syamsul Arifin; Bian-Sioe So

    2001-01-01

    Direct field-oriented induction motor drive system need rotor flux observer and rotor angular speed identifier. ANFIS (adaptive neuro fuzzy inference system) used for identifying parameter dynamics and system variable estimation, linear or nonlinear. ANFIS with backpropagation learning algorithm has applied to estimate flux rotor and identify rotor angular speed of three-phase induction motor

  13. The development of speed sensor observer for induction motor by using adaptive Neuro Fuzzy with back propagation learning method

    Microsoft Academic Search

    Era Purwanto; Sato Yukihiko; P Mauridhi Herry; Gigih Prabowo

    2006-01-01

    This paper proposed the simple method to develop observer for detects the speed of induction motor. Direct field-oriented induction motor drive system need rotor flux observer and rotor angular speed identifier. ANFIS is used for identifying parameter dynamics and system variable estimation, linear either non-linear. ANFIS with back propagation learning algorithm has applied to estimate flux rotor and identify rotor

  14. Abstract--The single-phase capacitor-run induction motor is widespread for small power applications where the

    E-print Network

    Boyer, Edmond

    Abstract--The single-phase capacitor-run induction motor is widespread for small power applications speed measurement on the basis of the capacitor voltage and proposes a low cost command device for a rolling shutter induction motor. First of all the article shows the analytical expression of the capacitor

  15. Active control using piezoceramic linear motors

    NASA Astrophysics Data System (ADS)

    Holcomb, Mark D.; Pokines, Brett J.; Inman, Daniel J.

    1994-05-01

    Proof mass actuators have long been an accepted and reliable method of vibration control. With the advent of new piezoceramic technology, the proof mass can now be driven by a piezoceramic linear motor. A linear motor has been designed and its performance is evaluated by comparing it against a Physik Instrument piezoceramic stack translator. Both linear motors are used to actively add damping to the bending modes of a section of the NASA Phase Zero Evolutionary Model. A modal test has been done on the test structure and its mode shapes, natural frequencies and damping ratios have been recorded. In the unlikely event of a power failure on board such a structure, a backup control scheme is desired. Viscoelastic damping material is incorporated into the newly designed actuator to improve the stability of the closed loop system and to offer good `shut down' performance in case of a power failure. Actuator performance such as force output, stroke length, and control implementation are compared.

  16. Low cost embedded solution for BLDC motor control

    Microsoft Academic Search

    Radu Duma; Petru Dobra; Mirela Dobra; Ioan Valentin Sita

    2011-01-01

    The paper presents a low cost embedded solution for brushless direct current (BLDC) motor control. An embedded control algorithm for BLDC motor control is presented and the minimal hardware requirements that a microcontroller must have in order to be used for BLDC motor control are described. The advantages with respect to existing control solutions are presented. Using the described approach

  17. Electric motor servo control system and method

    SciTech Connect

    Burney, C.F.

    1987-04-07

    This patent describes a system for maintaining the speed of a vehicle at a predetermined constant rate by controlling rotation of an electro-servo motor that is coupled to an element moveable between at least two positions by the servo motor for controlling the fuel-air mixture of the vehicle. The servo motor is responsive to a control current produced by a motor drive circuit to move the element. A means is included for interrupting the servo motor operation when the element is relatively immovable. The system comprises: element position indicating means operably coupled to the element for providing a signal having a value which varies with the position of the element; first circuit means for providing a first reference signal having a value representing when the element reaches a first extreme travel position, and for providing a second reference signal having a value representing when the element reaches a second extreme position of travel; and first comparator means operatively coupled to the element position indicating means and the first circuit means for comparing the value of the signal produced by the element position indicating means to the first reference signal and for providing a signal indicating whether the value of the signal from the element position indicating means exceeds the value of the first reference signal.

  18. Electric drive system with BLDC motor

    Microsoft Academic Search

    Lin Bai

    2011-01-01

    With the resource supply becoming severe recently, the use of hybrid car or electric car is a necessity that it can reduce the need of oil. This paper presents BLDC motor is the best choice for high-efficiency motor and shows a design of control system for BLDC motor. With the comparison of DC motor, Induction Motor and BLDC motor, Analysis

  19. [Motor control by the basal ganglia].

    PubMed

    Takakusaki, Kaoru

    2009-06-01

    The cerebral cortex controls cognitive and voluntary process of movements. The brainstem and spinal cord are involved in the execution of innately acquired motor patterns such as postural reflexes, muscle tone regulation and locomotion. Cortico-reticular projections arising from the motor cortical areas contribute to the postural control that precedes the voluntary movement process. The basal ganglia cooperatively regulates the activities of the cerebral cortex and the brainstem-spinal cord by its strong inhibitory and dis-inhibitory effects upon these target structures so that goal-directed movements could be appropriately performed. We propose that basal ganglia disfunction, including the abnormality in the dopaminergic projection system, may disturb the cooperative regulation, resulting in motor deficiencies expressed in basal diseases. PMID:19618841

  20. Mechanical fault detection in a medium-sized induction motor using stator current monitoring

    Microsoft Academic Search

    Andrew M. Knight; Sergio P. Bertani

    2005-01-01

    This paper presents the results of an experimental study of the detection of mechanical faults in an induction motor. As is reasonably well known, by means of analysis of combinations of permeance and magneto-motive force (MMF) harmonics, it is possible to predict the frequency of air gap flux density harmonics which occur as a result of certain irregularities in an

  1. Fourier and wavelet transformations for the fault detection of induction motor with stator current

    Microsoft Academic Search

    Sang-Hyuk Lee; Sungshin Kim; Jang Mok Kim; Man Hyung Lee

    2004-01-01

    In this literature, fault detection of an induction motor is carried out using the information of stator current. After preprocessing actual data, Fourier and wavelet transforms are applied to detect characteristics under the healthy and various faulted conditions. The most reliable phase current among 3-phase currents is selected by the fuzzy entropy. Data are trained with a neural network system,

  2. Bearing fault detection using wavelet packet transform of induction motor stator current

    Microsoft Academic Search

    Jafar Zarei; Javad Poshtan

    2007-01-01

    Induction motor vibrations, caused by bearing defects, result in the modulation of the stator current. In this research, bearing defect is detected using the stator current analysis via Meyer wavelet in the wavelet packet structure, with energy comparison as the fault index. The advantage of this method is in the detection of incipient faults. The presented method is evaluated using

  3. Development of a tool to detect faults in induction motors via current signature analysis

    Microsoft Academic Search

    Mark Fenger; Blake A. LLoyd; William T. Thomson

    2003-01-01

    This paper demonstrates through industrial case histories, how current signature analysis can reliably diagnose rotor cage problems in induction motor drives. Traditional CSA measurements can result in false alarms and\\/or misdiagnosis of healthy machines due to the presence of current frequency components in the stator current resulting from nonrotor related conditions such as mechanical load fluctuations, gearboxes, etc. Theoretical advancements

  4. An experimental study of induction motor current signature analysis techniques for incipient broken rotor bar detection

    Microsoft Academic Search

    Norman Mariun; Mohammad Rezazadeh Mehrjou; Mohammad Hamiruce Marhaban; Norhisam Misron

    2011-01-01

    Incipient fault detection of the induction machines (IM) prevents the unscheduled downtime and hence reduces maintenance costs. Condition monitoring, signal processing and data analysis are the key parts of the IM fault detection scheme. The Motor Current Signature Analysis (MCSA) is considered as an effective condition monitoring method in any IM. However, a signal processing technique, which enhances the fault

  5. Design and experimental investigation of high speed squirrel cage induction motor

    Microsoft Academic Search

    R. Anbarasu; R. K. Gupta; N. D. Sharma; G. Gauthaman; A. K. Wankhede; P. H. Chavda; J. Nataraj; B. Bhattacharjee

    1996-01-01

    In this paper the experimental investigation of high speed squirrel cage induction motor (750 Hz, 2 pole) has been presented. Measurement of the equivalent circuit parameters has been discussed in detail. For no-load, stand still test was used instead of light running test. A numerical technique was used for the computation of bridge leakage reactance of the closed rotor slot

  6. Vibration condition monitoring of rotors on AMB fed by induction motors

    Microsoft Academic Search

    Nicola Amati; Eugenio Brusa

    2001-01-01

    The presence of induction driver motors in rotors on active magnetic bearings (AMBs) can affect significantly the vibration monitoring operation because of the effect of the so-called unbalanced magnetic pull (UMP) on the rotor whirling cage. A sort of beat appears in monitored radial displacements, caused by the interaction between the unbalance response of the rotor and the UMP, depending

  7. Design and simulation of a photovoltaic induction motor coupled water pumping system

    Microsoft Academic Search

    2012-01-01

    Efficiency is the sense of energy saving is a main issue in photovoltaic pumping. The objective of this work is to design and simulate an efficient battery less pumping system powered from photovoltaic panels, comprising a new push-pull converter with Induction Motor. In a photovoltaic pump-storage system, solar energy is stored, when sunlight is available as potential energy in water

  8. On the Stability of Full Adaptive Observer for Induction Motor in Regenerating Mode

    Microsoft Academic Search

    Erik Etien; Claude Chaigne; Nadia Bensiali

    2010-01-01

    This paper, which deals with the stability of adaptive observers for induction motor in the regenerating mode, proposes a new approach that is consist of describing the error system in state space representation. With this formulation, it is possible to establish a cartography of unstable eigenvalues in the torque\\/speed plane, thus simplifying the stability analysis. Moreover, a new stability criterion

  9. Combined Simulink-finite elements approach to inverter driven induction motor

    Microsoft Academic Search

    Adrian Dumitrescu; Florin David; Valentin Burtea; Tapani Jokinen; M. Rosu

    1999-01-01

    This paper presents the modeling of a PWM induction motor drive by means of Matlab\\/Simulink package. The input parameters are calculated accurately by a harmonic finite element analysis. The coupled Simulink-finite elements approach is validated by simulating the unloaded starting

  10. A neural network-based optimization approach for induction motor design

    Microsoft Academic Search

    K. Idir; Liuchen Chang; Heping Dai

    1996-01-01

    This paper proposes a new approach, using artificial neural networks (ANNs), to optimize a set of design parameters of induction motors. The training patterns for the ANNs can be generated from a finite element method, an expert system or an experienced design engineer. The ANN will be trained to learn the relations governing the input and output of an electrical

  11. A high-performance cross-current type cycloconverter-fed induction motor drive system

    Microsoft Academic Search

    HIROMI HOSODA; SHINJI TATARA; RYOUICHI KUROSAWA; H. Hakata; K. Doi

    1988-01-01

    Making use of the latest techniques, the authors have successfully developed a cross-current-type cycloconverter-fed, squirrel-cage induction motor drive system, which far exceeds DC drive systems over a wide range from zero speed to high speed. It is best suited for tandem cold mill main and various other large-scale rolling mills

  12. Calculation of UMP in induction motors with series or parallel winding connections

    Microsoft Academic Search

    D. G. Dorrell; A. C. Smith

    1994-01-01

    This paper presents a general analytical method for determining the unbalanced magnetic pull (UMP) produced in three-phase induction motors with an eccentric rotor. The model uses the conformal transformation technique coupled to a winding impedance approach that is capable of accommodating any stator winding connection. The paper examines the influence of using parallel stator winding paths as a means of

  13. Singular value decomposition based feature extraction approaches for classifying faults of induction motors

    NASA Astrophysics Data System (ADS)

    Kang, Myeongsu; Kim, Jong-Myon

    2013-12-01

    This paper proposes singular value decomposition (SVD)-based feature extraction methods for fault classification of an induction motor: a short-time energy (STE) plus SVD technique in the time-domain analysis, and a discrete cosine transform (DCT) plus SVD technique in the frequency-domain analysis. To early identify induction motor faults, the extracted features are utilized as the inputs of multi-layer support vector machines (MLSVMs). Since SVMs perform well with the radial basis function (RBF) kernel for appropriately categorizing the faults of the induction motor, it is important to explore the impact of the ? values for the RBF kernel, which affects the classification accuracy. Likewise, this paper quantitatively evaluates the classification accuracy with different numbers of features, because the number of features affects the classification accuracy. According to the experimental results, although SVD-based features are effective for a noiseless environment, the STE plus SVD feature extraction approach is more effective with and without sensor noise in terms of the classification accuracy than the DCT plus SVD feature extraction approach. To demonstrate the improved classification of the proposed approach for identifying faults of the induction motor, the proposed SVD based feature extraction approach is compared with other state-of-the art methods and yields higher classification accuracies for both noiseless and noisy environments than conventional approaches.

  14. Estimation of the running speed and bearing defect frequencies of an induction motor from vibration data

    Microsoft Academic Search

    Hasan Ocak; Kenneth A Loparo

    2004-01-01

    This paper presents two separate algorithms for estimating the running speed and the bearing key frequencies of an induction motor using vibration data. Bearing key frequencies are frequencies at which roller elements pass over a defect point. Most frequency domain-based bearing fault detection and diagnosis techniques (e.g. envelope analysis) rely on vibration measurements and the bearing key frequencies. Thus, estimation

  15. FPGA-Based Multiple-Channel Vibration Analyzer for Industrial Applications in Induction Motor Failure Detection

    Microsoft Academic Search

    Luis Miguel Contreras-Medina; René de Jesús Romero-Troncoso; Eduardo Cabal-Yepez; Jose de Jesus Rangel-Magdaleno; Jesus Roberto Millan-Almaraz

    2010-01-01

    Early detection of failures in equipment is one of the most important concerns to industry. Many techniques have been developed for early failure detection in induction motors. There is the necessity of low-cost instrumentation for online multichannel measurement and analysis of vibration in the frequency domain, and this could be fixed to the machine for continuous monitoring to provide a

  16. Derating of induction motors operating with a combination of unbalanced voltages and over or undervoltages

    Microsoft Academic Search

    Pragasen Pillay; Peter Hofmann; Marubini Manyage

    2002-01-01

    This paper examines the proper application of induction machines when supplied by unbalanced voltages in the presence of over- and undervoltages. Differences in the definition of voltage unbalance are also examined. The approach adopted is to use NEMA derating for unbalanced voltages as a basis to include the effects of undervoltages and overvoltages, through motor loss calculations.

  17. Derating of induction motors operating with a combination of unbalanced voltages and over- or undervoltages

    Microsoft Academic Search

    P. Pillay; P. Hofmann

    2001-01-01

    This paper examines the proper application of induction machines when supplied by unbalanced voltages in the presence of over- and undervoltages. Differences in the definition of voltage unbalance are also examined. The approach adopted is to use NEMA derating for unbalanced voltages as a basis to include the effects of undervoltages and overvoltages, through motor loss calculations

  18. Local vs. wide-area undervoltage load shedding in the presence of induction motor loads

    Microsoft Academic Search

    Bogdan Otomega; Thierry Van Cutsem

    2009-01-01

    In the presence of induction motor loads, long-term voltage instability may end up in a sharp voltage decrease, which makes the tuning of undervoltage load shedding more delicate. This paper first investigates the ability of a purely distributed load shedding scheme, previously proposed by the authors, to cope with these situations. Owing to difficulties to reconcile dependability and security, an

  19. Voltage Sag Effects on the Process Continuity of a Refinery with Induction Motors Loads

    Microsoft Academic Search

    Tarek I. ElShennawy; Mahmoud A. El-Gammal; Amr Y. Abou-Ghazala

    2009-01-01

    Problem statement: Process continuity of industrial plants (like a re finery) is subjected to several shutdowns due to voltage sags causing large induction motors to trip, either by undervoltage o r by overcurrent relays, sometimes by the mechanical protection. These unplanned shutdowns cost the plant tens of thousands of dollars per shutdown in addition to material damage costs, restart charges

  20. Lifetime of Film Capacitors in Single-Phase Regenerative Induction Motor Drives

    Microsoft Academic Search

    G. M. Buiatti; S. M. A. Cruz; A. J. M. Cardoso

    2007-01-01

    Metallized polypropylene film capacitors (MPPF) are a very interesting alternative to electrolytic capacitors, because they can withstand much higher levels of surge voltage, very high RMS currents, and offer longer lifetimes. This paper analyses the lifetime of MPPF capacitors present in the DC link of a single-phase regenerative induction motor (IM) drive. The system under analysis contains a single-phase active

  1. Evaluation of Motor Control Using Haptic Device

    NASA Astrophysics Data System (ADS)

    Nuruki, Atsuo; Kawabata, Takuro; Shimozono, Tomoyuki; Yamada, Masafumi; Yunokuchi, Kazutomo

    When the kinesthesia and the touch act at the same time, such perception is called haptic perception. This sense has the key role in motor information on the force and position control. The haptic perception is important in the field where the evaluation of the motor control is needed. The purpose of this paper is to evaluate the motor control, perception of heaviness and distance in normal and fatigue conditions using psychophysical experiment. We used a haptic device in order to generate precise force and distance, but the precedent of the evaluation system with the haptic device has been few. Therefore, it is another purpose to examine whether the haptic device is useful as evaluation system for the motor control. The psychophysical quantity of force and distance was measured by two kinds of experiments. Eight healthy subjects participated in this study. The stimulation was presented by haptic device [PHANTOM Omni: SensAble Company]. The subjects compared between standard and test stimulation, and answered it had felt which stimulation was strong. In the result of the psychophysical quantity of force, just noticeable difference (JND) had a significant difference, and point of subjective equality (PSE) was not different between normal and muscle fatigue. On the other hand, in the result of the psychophysical quantity of distance, JND and PSE were not difference between normal and muscle fatigue. These results show that control of force was influenced, but control of distance was not influenced in muscle fatigue. Moreover, these results suggested that the haptic device is useful as the evaluation system for the motor control.

  2. 232 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 2, MARCH 2002 Current Control Strategy for Brushless DC Motors

    E-print Network

    Catholic University of Chile (Universidad Católica de Chile)

    , the power-to-weight ratio of PMSM and BDCM is higher than equivalent squirrel cage induction machines machine fulfils these requirements, but this ma- chine needs periodic maintenance. The ac machines, like the power-to-weight ratio and the efficiency. For induction motors, flux control has been developed, which

  3. Electromagnetic forces in cage induction motors with rotor eccentricity

    Microsoft Academic Search

    A. Tenhunen; T. Benedetti; T. P. Holopainen; A. Arkkio

    2003-01-01

    The paper deals with the electromagnetic forces in induction machines when the rotor is performing eccentric motion with respect to the stator. The studied eccentric motions of the rigid cage rotor are cylindrical circular whirling motion, symmetric conical whirling motion and the combination of these two basic modes of eccentric motions. The multi-slice, time stepping finite element analysis is used

  4. Multilevel control of hydraulic gerotor motors and pumps

    Microsoft Academic Search

    Brian S. R. Armstrong; Qinghui Yuan

    2006-01-01

    Multi-level control is a novel method introduced for the control of hydraulic motors and pumps. The method is applicable when two-position, electronically controlled valves are connected to each chamber of a gerotor motor or pump. For motors, the multi-level control can directly regulate the torque, similar to torque regulation of a DC electric motor through current control. For pumps, multi-level

  5. Microstep Stepper Motor Control Based on FPGA Hardware Implementation

    Microsoft Academic Search

    Sorawat Chivapreecha; Kobchai Dejhan

    This paper proposes a design of stepper motor control in microstep driven mode using FPGA (Field Programmable Gate Array) for hardware implementation. The methods to drive stepper motor in microstep excitation mode are to control of the controlling currents in each phase windings of stepper motor with reference signals. These reference signals are used for controlling the current levels, the

  6. Optimal Control for Autonomous Motor Behavior

    Microsoft Academic Search

    Tom Erez

    2011-01-01

    This dissertation presents algorithms that allow robots to generate optimal behavior from first principles. Instead of hard-coding every desired behavior, we encode the task as a cost function, and use numerical optimization to find action sequences that can accomplish the task. Using the theoretical framework of optimal control, we develop methods for generating autonomous motor behavior in high-dimensional domains of

  7. Motor Control: Neural Models and System Theory

    E-print Network

    Doya, Kenji

    Motor Control: Neural Models and System Theory Kenji Doya Information Sciences Division, ATR of Frontier Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Fax: +81-3-5841-8609 E-mail: kimura@crux.t.u-tokyo.ac.jp aiko@crux.t.u-tokyo.ac.jp October 31, 2000 Abstract

  8. Robust PI control for servo DC motor

    Microsoft Academic Search

    Petru Dobra

    2002-01-01

    The paper reexamines the standard nested three loop controller structure for a permanent magnet DC motor in position servo applications. An analysis of a generic example demonstrates that the robust synthesis, via LMI optimization, offers noticeable improvements in performance especially in cases of relatively large model uncertainties. The proposed technique guarantees uniform exponential stability of the closed loop system, a

  9. Design and prototyping methods for brushless motors and motor control

    E-print Network

    Colton, Shane W. (Shane William)

    2010-01-01

    In this report, simple, low-cost design and prototyping methods for custom brushless permanent magnet synchronous motors are explored. Three case-study motors are used to develop, illustrate and validate the methods. Two ...

  10. Design, implementation and comparison of two wavelet based methods for the detection of broken rotor bars in three phase induction motors

    Microsoft Academic Search

    R. Salehi Arashloo; A. Jalilian

    2010-01-01

    Preventive maintenance of induction motors has an important role in reducing expensive shutdowns due to motor faults. Motor Current Signature Analysis, MCSA, provides a simple way to evaluate the health of a machine. In this paper, two different wavelet based methods are proposed to detect broken rotor bar faults in three phase induction motors. The methods are in addition examined

  11. Motor Control Theories and Their Applications

    PubMed Central

    Latash, Mark L.; Levin, Mindy F.; Scholz, John P.; Schöner, Gregor

    2010-01-01

    Summary We describe several influential hypotheses in the field of motor control including the equilibrium-point (referent configuration) hypothesis, the uncontrolled manifold hypothesis, and the idea of synergies based on the principle of motor abundance. The equilibrium-point hypothesis is based on the idea of control with thresholds for activation of neuronal pools; it provides a framework for analysis of both voluntary and involuntary movements. In particular, control of a single muscle can be adequately described with changes in the threshold of motor unit recruitment during slow muscle stretch (threshold of the tonic stretch reflex). Unlike the ideas of internal models, the equilibrium-point hypothesis does not assume neural computations of mechanical variables. The uncontrolled manifold hypothesis is based on the dynamic system approach to movements; it offers a toolbox to analyze synergic changes within redundant sets of elements related to stabilization of potentially important performance variables. The referent configuration hypothesis and the principle of abundance can be naturally combined into a single coherent scheme of control of multi-element systems. A body of experimental data on healthy persons and patients with movement disorders are reviewed in support of the mentioned hypotheses. In particular, movement disorders associated with spasticity are considered as consequences of an impaired ability to shift threshold of the tonic stretch reflex within the whole normal range. Technical details and applications of the mentioned hypotheses to studies of motor learning are described. We view the mentioned hypotheses as the most promising ones in the field of motor control, based on a solid physical and neurophysiological foundation. PMID:20944446

  12. A 7.5 kW ultrasonic inverter motor drive employing MOS-controlled thyristors

    Microsoft Academic Search

    W. L. Erdman; R. Hudson; J. Yang; R. G. Hoft

    1990-01-01

    The design and performance of an inverter induction motor drive that employs an ultrasonic switching frequency to minimize audible noise is described. The MOS-controlled thyristor (MCT) is a high-speed power semiconductor with the potential for high voltage and current ratings. Distinctive features of the device are discussed relative to inverter topology, gate drive requirements, and fault protection. Since MCT devices

  13. Regenerative Braking Performance Analysis of a Thyristor-Chopper Controlled DC Series Motor

    Microsoft Academic Search

    Sailendra N. Bhadra; Nisit K. De; Ajit K. Chattopadhyay

    1981-01-01

    This paper presents a comprehensive analysis which predicts the performance of a thyristor-chopper controlled dc series motor during regenerative braking operation. The analysis takes into account all the possible modes of operation during this type of braking, the nonlinearity of the magnetization characteristics including the variation of the field inductance, and the effect of the commutating capacitor in the chopper

  14. DC Motor control using motor-generator set with controlled generator field

    DOEpatents

    Belsterling, Charles A. (Norristown, PA); Stone, John (Medford, NJ)

    1982-01-01

    A d.c. generator is connected in series opposed to the polarity of a d.c. power source supplying a d.c. drive motor. The generator is part of a motor-generator set, the motor of which is supplied from the power source connected to the motor. A generator field control means varies the field produced by at least one of the generator windings in order to change the effective voltage output. When the generator voltage is exactly equal to the d.c. voltage supply, no voltage is applied across the drive motor. As the field of the generator is reduced, the drive motor is supplied greater voltage until the full voltage of the d.c. power source is supplied when the generator has zero field applied. Additional voltage may be applied across the drive motor by reversing and increasing the reversed field on the generator. The drive motor may be reversed in direction from standstill by increasing the generator field so that a reverse voltage is applied across the d.c. motor.

  15. Implementation and position control performance of a position-sensorless IPM motor drive system based on magnetic saliency

    Microsoft Academic Search

    Satoshi Ogasawara; Hirofumi Akagi

    1998-01-01

    This paper describes position-sensorless control of an interior permanent magnet synchronous (IPM) motor, which is characterized by real-time position estimation based on magnetic saliency. The real-time estimation algorithm detects motor current harmonics and determines the inductance matrix, including rotor position information. An experimental system consisting of an IPM motor and a voltage-source pulsewidth modulation inverter has been implemented and tested

  16. Motor control of voluntary arm movements

    Microsoft Academic Search

    M. L. Corradini; M. Gentilucci; T. Leo; G. Rizzolatti

    1992-01-01

    The motor control of pointing and reaching-to-grasp movements was investigated using two different approaches (kinematic and\\u000a modelling) in order to establish whether the type of control varies according to modifications of arm kinematics. Kinematic\\u000a analysis of arm movements was performed on subjects' hand trajectories directed to large and small stimuli located at two\\u000a different distances. The subjects were required either

  17. Sensor fault tolerant control of doubly fed induction machines using multiple switching mechanisms

    Microsoft Academic Search

    Monica E. Romero; Maria M. Seron

    2011-01-01

    We propose a new strategy for sensor fault tolerant control of rotor wound induction motors operating as stand alone generators. The strategy employs three switching mechanisms that detect faults in, respectively, rotor current sensors, stator current sensors and stator voltage sensors. Each of the switching mechanisms receives measurements from the three phases and builds three residual quantities by combining these

  18. State Switching Digital Control Technique for Switched Reluctance Motor Drives

    Microsoft Academic Search

    S. M. Lukic; A. Emadi

    2007-01-01

    It has been anticipated that switched reluctance motor (SRM) drives will become the future drives of choice due to the simplicity of the motor construction, high speed capability, and relatively high power density. The motor has windings on the stator and a passive rotor made of ferromagnetic material such as iron. However, the control of the motor is quite complex

  19. Remote control system and its development for linear asynchronous motor

    Microsoft Academic Search

    Alexey Svinov; Yury V. Turygin; Jan Sitar

    2010-01-01

    The paper deals with the remote control of linear motor. Concept of linear motor and its benefits are described. For providing remote control system which is possible to monitor by Internet the basic types of distance control systems are studied. Communication between motor and a computer is usually realized by serial port (RS 232 or RS 485) which is not

  20. Motor current signature analysis during accelerated life testing of form wound induction motors

    Microsoft Academic Search

    Prabhakar Neti; Manoj R. Shah; Karim Younsi; John Krahn; Joe Yingneng Zhou; C. David Whitefield

    2010-01-01

    The work presented in this paper describes motor accelerated thermo-mechanical aging and helps set the stage for on-line monitoring\\/data analysis as an effective means to detect a fault as electrical machine develops it and identify its type in real time. As a first step towards this goal, Motor Current Signature Analysis (MCSA) is applied to the data collected during accelerated

  1. Current phase control methods for permanent magnet synchronous motors

    Microsoft Academic Search

    SHIGEO MORIMOTO; YOJI TAKEDA; T. Hirasa

    1990-01-01

    Three types of current phase control methods are examined for the interior magnet motor and the surface magnet motor: (1) the i d=0 control method, (2) the cos ?=1 control method, and (3) the constant-flux-linkage control method. The control circuits for realizing these control methods were investigated and a drive test carried out. The most suitable current phase control method

  2. Applying adjustable speed drives (ASD`s) to 3 phase induction NEMA frame motors

    SciTech Connect

    Manz, L.

    1995-06-01

    The availability, price, and flexibility of ASD`s for use with three phase induction motors (referred to simply as motors in the rest of this article) has made ASD`s very common items in many applications where AC and DC motors have been applied in the past. Mating the ASD to the motor and the load requirements is the responsibility of a system integrator. In some projects the system integrator may be the equipment supplier. In others, it may be the ASD supplier. In still others, it may be the Engineer in the mill who integrates the system. Regardless of who integrates the system, if any of the parts do not function properly, the plant engineer has the frustration of plant down time while trying to get the system running. It is the intention of the author in writing this paper to first explain why the motor gets hotter on ASD power than it does on sine wave power. Second, he will explain how to determine the derating if any required on standard motors when applied to ASD`s. There are other areas of concern in mating a motor to an ASD including noise, vibration, and insulation related issues. These will not be included in this paper and could easily be the subject of another paper in the future.

  3. Microcomputer control of an electronically commutated dc motor

    Microsoft Academic Search

    M. A. El-Sharkawi; J. S. Coleman; I. S. Mehdi; D. L. Sommer

    1986-01-01

    A microcomputer control system for an electronically commutated dc motor (ECM) has been designed, built and tested. A 3-hp, 270-volt, samarium-cobalt brushless dc motor is controlled by an Intel 8086-based microcomputer. The main functions of the microcomputer are to control the speed of the motor, to provide forward or reverse rotation, to brake, and to protect the motor and its

  4. Analysis of Parallel-Operated Self-Excited Induction Generators Feeding an Induction Motor Load with a Long-Shunt Connection

    Microsoft Academic Search

    SUNG-CHUN KUO; LI WANG

    2004-01-01

    This article presents the analyzed results of two identical parallel-operated autonomous self-excited induction generators (SEIGs) supplying an induction motor (IM) load through a long-shunt compensation. The voltage equations of the parallel operated SEIGs can be simplified as a large equivalent SEIG using Kirchhoff's current law and the d-q axis induction-machine model is utilized to simulate the dynamic performance of the

  5. Development of Voltage Sag Compensator and UPS using a Flywheel Induction Motor and an Engine Generator

    NASA Astrophysics Data System (ADS)

    Kato, Shuhei; Takaku, Taku; Sumitani, Hideo; Shimada, Ryuichi

    Flywheel energy storage systems are focused as uninterruptible power supplies (UPS) from the viewpoint of environmental friendliness and high durability performance. Using a low-speed and heavy flywheel, and a low-cost squirrel-cage induction motor/generator, two applications are proposed; 1) 11kW voltage sag compensator using a capacitor self-excited induction generator without semiconductor converters; 2) UPS composed of the flywheel system and an engine generator. From some experimental results, an ideal voltage sag compensator and UPS are realized by the low-technology flywheel system.

  6. Study of Drive System for Linear Induction Motor Using Magnetic Energy Recovery Switch

    NASA Astrophysics Data System (ADS)

    Isobe, Takanori; Takaku, Taku; Kitahara, Tadayuki; Sumitani, Hideo; Shimada, Ryuichi

    This paper proposes a suitable power supply for driving linear induction motors. The power supply consists of a voltage source inverter (VSI) and a magnetic energy recovery switch (MERS). Circuit configuration and operation principles of the power supply are described. Power factor correction by MERS can cause an increase of the output power. Technical advantages of using MERS compared with increasing voltage rating of VSI are discussed. Some experiments with a linear induction motor were conducted. The results confirms that MERS can reduce capacity of the VSI or increase output with the same VSI capacity. The number of devices and losses are evaluated on large scale drive system. A half-bridge type of MERS is proposed and discussed. The half-bridge MERS improves disadvantages of using MERS.

  7. Brushless motors and controllers designed for GM sunrayce

    Microsoft Academic Search

    Cambier

    1990-01-01

    A new series of brushless motors and controllers have been designed and are being offered to the participants of the GM sponsored Sunrayce. The design, function, and application are discussed. Unique characteristics of the motors and controllers are explained. The author's company has been involved with drive systems for solar cars since 1987. They have developed a standard motor and

  8. Robust adaptive control of variable reluctance stepper motors

    Microsoft Academic Search

    Hemant Melkote; Farshad Khorrami; Sandeep Jain; Michael S. Mattice

    1999-01-01

    Robust adaptive nonlinear control of variable reluctance motors is considered. Utilizing a model for the motor that incorporates magnetic saturation, an adaptive controller is designed for the plant that is robust to parametric and dynamic uncertainties in the entire electromechanical system. A robust torque profile is first designed for the motor. Thereafter, a commutation strategy is applied to define desired

  9. Human Motor Computational Model Through Iterative Model Reference Adaptive Control

    E-print Network

    Melbourne, University of

    Human Motor Computational Model Through Iterative Model Reference Adaptive Control Shou-Han Zhou observed in the human motor adaptation. Keywords: Human Motor Computational Model; Iterative Model.burdet@imperial.ac.uk). Abstract: A computational model using mechanical impedance control in combination with an iterative model

  10. Fourier and Wavelet Transformations for the Fault Detection of Induction Motor with Stator Current

    Microsoft Academic Search

    Sang-hyuk Lee; Seong-pyo Cheon; Youn Tae Kim; Sungshin Kim

    2006-01-01

    \\u000a In this literature, fault detection of an induction motor is carried out using the information of stator current. After preprocessing\\u000a actual data, Fourier and Wavelet transforms are applied to detect characteristics under the healthy and various faulted conditions.\\u000a The most reliable phase current among 3-phase currents is selected by the fuzzy entropy. Data are trained with a neural network\\u000a system,

  11. Fourier and wavelet transformations application to fault detection of induction motor with stator current

    Microsoft Academic Search

    Sang-hyuk Lee; Yi-qi Wang; Jung-il Song

    2010-01-01

    Fault detection of an induction motor was carried out using the information of the stator current. After synchronizing the\\u000a actual data, Fourier and wavelet transformations were adopted in order to obtain the sideband or detail value characteristics\\u000a under healthy and various faulty operating conditions. The most reliable phase current among the three phase currents was\\u000a selected using an approach that

  12. Fourier and Wavelet Transformations for the Fault Detection of Induction Motor with Stator Current

    Microsoft Academic Search

    Sang-Hyuk Lee; Seong-Pyo Cheon; Yountae Kim; Sungshin Kim

    \\u000a In this literature, fault detection of an induction motor is carried out using the information of stator current. After preprocessing\\u000a actual data, Fourier and Wavelet transforms are applied to detect characteristics under the healthy and various faulted conditions.\\u000a The most reliable phase current among 3-phase currents is selected by the fuzzy entropy. Data are trained with a neural network\\u000a system,

  13. A transient energy function for power systems including the induction motor model

    Microsoft Academic Search

    Yong Min; Lei Chen

    2007-01-01

    A construction method for power system transient energy function is studied in the paper, which is simple and universal, and\\u000a can unify the forms of some current energy functions. A transient energy function including the induction motor model is derived\\u000a using the method. The unintegrable term is dealt with to get an approximate energy function. Simulations in a 3-bus system

  14. 3-D electro-magnetic analyses of a cage induction motor with rotor skew

    Microsoft Academic Search

    H. Kometani; S. Sakabe; K. Nakanishi

    1996-01-01

    The paper studied the performance characteristics of a three-phase cage induction motor using a 3D finite element technique. Especially, the effects of rotor skew and the rotor end-rings and the distribution of the electromagnetic field toward the axial direction, which have not been able to be analyzed accurately by 2D analysis, were investigated. Since the 3D analysis enabled the analysis

  15. A scale invariant algorithm for the automatic diagnosis of rotor bar failures in induction motors

    Microsoft Academic Search

    J. Antonino-Daviu; S. Aviyente; E. Strangas; M. Riera-Guasp

    2011-01-01

    Development of reliable algorithms for the automatic diagnosis of broken rotor bars in induction motors (IM) has become the concern of many researchers during these previous decades. Though conventional steady-state current-based diagnosis approaches have behaved well for certain industrial applications, they may be not suitable in cases in which the machine does not operate under ideal stationary conditions (e.g. presence

  16. Split-phase induction motor operation from PWM voltage source inverter

    Microsoft Academic Search

    K. Gopakumar; V. T. Ranganathan; S. R. Bhat

    1993-01-01

    The operation of split-phase induction motors from pulse-width modulated (PWM) voltage source inverters is examined. Splitting the phase windings leads to reduced voltage ratings for the inverter switches. As compared with seven positions for the space phasor of voltage in three-phase machines, 48 different locations bounded by a 12-sided polygon are possible in the split-phase machine. Based on space phasor

  17. New natural observer applied to speed-sensorless DC servo and induction motors

    Microsoft Academic Search

    Sidney R. Bowes; Ata Sevinç; Derrick Holliday

    2004-01-01

    A simple observer design technique with parameter adaptation is proposed for bounded-input bounded-output nonlinear systems. In this technique, no feedback is used in the observer but parameter estimations are considered as if they are observer inputs. The proposed technique is successfully applied to speed-sensorless dc servomotors and speed-sensorless induction motors with load torque adaptation schemes. The observer is robust to

  18. Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Motors with Concentrated Windings

    SciTech Connect

    McKeever, John W [ORNL; Patil, Niranjan [University of Tennessee, Knoxville (UTK); Lawler, Jack [ORNL

    2007-07-01

    A 30 pole, 6 kW, and 6000 maximum revolutions per minute (rpm) prototype of the permanent magnet synchronous motor (PMSM) with fractional-slot concentrated windings (FSCW) has been designed, built, and tested at the University of Wisconsin at Madison (UWM). This machine has significantly more inductance than that of regular PMSMs. The prototype was delivered in April 2006 to the Oak Ridge National Laboratory (ORNL) for testing and development of a controller that will achieve maximum efficiency. In advance of the test/control development effort, ORNL has used the PMSM models developed over a number of previous studies to study how steady state performance of high inductance PMSM machines relates to control issues. This report documents the results of this research. The amount of inductance that enables the motor to achieve infinite constant power speed ratio (CPSR) is given by L{sub {infinity}} = E{sub b}/{Omega}{sub b}I{sub R}, where E{sub b} is the root-mean square (rms) magnitude of the line-to-neutral back-electromotive force (emf) at base speed, {Omega}{sub b} is the base speed in electrical radians per second, and I{sub R} is the rms current rating of the motor windings. The prototype machine that was delivered to ORNL has about 1.5 times as much inductance as a typical PMSM with distributed integral slot windings. The inventors of the FSCW method, who designed the prototype machine, remarked that they were 'too successful' in incorporating inductance into their machine and that steps would be taken to modify the design methodology to reduce the inductance to the optimum value. This study shows a significant advantage of having the higher inductance rather than the optimal value because it enables the motor to develop the required power at lower current thereby reducing motor and inverter losses and improving efficiency. The main problem found with high inductance machines driven by a conventional phase advance (CPA) method is that the motor current at high speed depends solely on machine parameters and is virtually independent of the load level and the direct current (dc) supply voltage. Thus, the motor current is virtually the same at no load as at full load resulting in poor efficiency at less than full load conditions. While an inductance higher than the value cited above is warranted, it still does not ensure that the motor current is proportional to load; consequently, the problem of low efficiency at high speed and partial load is not resolved but is only mitigated. A common definition of 'base speed' is the speed at which the voltage applied to the motor armature is equal to the magnitude of the back-emf. The results in this study indicate that the dc supply voltage should be adequate to drive rated current into the motor winding at the specified base speed. At a minimum this requires sufficient voltage to overcome not only the back-emf but also the voltage drop across the internal impedance of the machine. For a high inductance PMSM, the internal impedance at base speed can be considerable and substantial additional voltage is required to overcome the internal voltage drop. It is further shown that even more voltage than the minimum required for injecting rated current at base speed can be beneficial by allowing the required power to be developed at lower current, which reduces losses in the motor and inverter components. Further, it is shown that the current is minimized at a unique speed; consequently, there may be room for optimization if the drive spends a substantial amount of its operating life at a certain speed (for example 60 mph). In this study, fundamental frequency phasor models are developed for a synchronous PMSM and the control systems that drive them is CPA. The models were compared with detailed simulations to show their validity. The result was used to design a traction drive control system with optimized efficiency to drive the fractional-slot motor with concentrated windings. The goal is to meet or exceed the FreedomCAR inverter cost and performance targets.

  19. Reconfigurable microstepping control of stepper motors using FPGA embedded RAM

    Microsoft Academic Search

    Armando Astarloa; Unai Bidarte; Aitzol Zuloaga; I. M. de Alegria

    2003-01-01

    The control of stepper motors using microsteps in open-loop systems is a well known mechanical and electrical improvement. The most common stepper motor controllers have all the elements to perform a microstepping control requiring only the digital control for the current level and direction in each winding. In this design we propose a cost-effective solution to integrate this control into

  20. High-Frequency Modeling of the Long-Cable-Fed Induction Motor Drive System Using TLM Approach for Predicting Overvoltage Transients

    Microsoft Academic Search

    Liwei Wang; Carl Ngai-Man Ho; Francisco Canales; Juri Jatskevich

    2010-01-01

    Induction motor drive systems fed with cables are widely used in many industrial applications. Accurate prediction of motor terminal overvoltage, caused by impedance mismatch between the long cable and the motor, plays an important role for motor dielectric insulation and optimal design of dv\\/dt filters. In this paper, a novel modeling methodology for the investigation of long-cable-fed induction motor drive

  1. Hot gas thrust vector control motor

    NASA Astrophysics Data System (ADS)

    Berdoyes, Michel; Ellis, Russell A.

    1992-07-01

    A hot gas thrust vector control (HGTVC) motor developed in the framework of a Foreign Weapon Evaluation program is discussed. Two HGTVC versions were evaluated on the two nozzles of the program, normal injection with a blunt pintle and 10 deg upstream injection with a tapered pintle. The HGTVC system was tested on a modified ORBUS-1 motor which is based on two technologies, namely, a composite chamber polar boss (CPB) and a two-piece C-C nozzle which threads to the CPB and receives two HGVs embedded into its exit cone, 180 deg apart. It is concluded that the composite polar bosses and C-C nozzles performed successfully in both firings.

  2. An Improved Sensorless DTC Scheme for EV Induction Motors

    E-print Network

    Paris-Sud XI, Université de

    the vehicle dynamics. Simulations have been firstly carried out on a test vehicle propelled by a 37-k, direct torque control, vehicle dynamics. I. INTRODUCTION Recently a lot of effort was focused towards

  3. Summary of electric vehicle dc motor-controller tests

    SciTech Connect

    McBrien, E F; Tryon, H B

    1982-09-01

    Available performance data for production motors are usually of marginal value to the electric vehicle designer. To provide at least a partial remedy to this situation, tests of typical dc propulsion motors and controllers were conducted as part of the DOE Electric Vehicle Program. The objectives of this program were to evaluate the differences in the performance of dc motors when operating with chopper-type controllers and when operating on direct current; and to gain an understanding of the interactions between the motor and the controller which cause these differences. Toward this end, motor-controller tests performed by the NASA Lewis Research Center provided some of the first published data that quantified motor efficiency variations for both ripple-free (straight dc) and chopper modes of operation. Test and analysis work at the University of Pittsburgh explored motor-controller relationships in greater depth. And to provide additional data, 3E Vehicles tested two small motors, both on a dynamometer and in a vehicle, and the Eaton Corporation tested larger motors, using sophisticated instrumentation and digital processing techniques. All the motors tested were direct-current types. Of the separately excited types, seven were series wound and two were shunt wound. One self-excited permanent magnet type was also tested. Four of the series wound motors used brush shifting to obtain good commutation. In almost all cases, controller limitations constrained the test envelope so that the full capability of the motors could not be explored.

  4. Smart Technique for Induction Motors Diagnosis by Monitoring the Power Factor Using Only the Measured Current

    NASA Astrophysics Data System (ADS)

    Shnibha, R. A.; Albarabar, A. S.

    2012-05-01

    This paper is concerned with accurate, early and reliable induction motor IM fault detection and diagnosis using an enhanced power parameter measurement technique. IM protection devices typically monitor the motor current and/or voltage to provide the motor protection from e.g. current overload, over/under voltage, etc. One of the interesting parameters to monitor is the operating power factor (PF) of the IM which provides better under-load protection compared to the motor current based approaches. The PF of the motor is determined by the level of the current and voltage that are drawn, and offers non-intrusive monitoring. Traditionally, PF estimation would require both voltage and the current measurements to apply the displacement method. This paper will use a method of determining the operating PF of the IM using only the measured current and the manufacturer data that are typically available from the nameplate and/or datasheet for IM monitoring. The novelty of this work lies in detecting very low phase imbalance related faults and misalignment. Much of the previous work has dealt with detecting phase imbalance faults at higher degrees of severity, i.e. voltage drops of 10% or more. The technique was tested by empirical measurements on test rig comprised a 1.1 kW variable speed three phase induction motor with varying output load (No load, 25%, 50%, 75% and 100% load). One common faults was introduced; imbalance in one phase as the electrical fault The experimental results demonstrate that the PF can be successfully applied for IM fault diagnosis and the present study shows that severity fault detection using PF is promising. The proposed method offers a potentially reliable, non-intrusive, and inexpensive CM tool which can be implemented with real-time monitoring systems

  5. Losses in chopper-controlled DC series motors

    NASA Technical Reports Server (NTRS)

    Hamilton, H. B.

    1982-01-01

    Motors for electric vehicle (EV) applications must have different features than dc motors designed for industrial applications. The EV motor application is characterized by the following requirements: (1) the need for highest possible efficiency from light load to overload, for maximum EV range, (2) large short time overload capability (The ratio of peak to average power varies from 5/1 in heavy city traffic to 3/1 in suburban driving situations) and (3) operation from power supply voltage levels of 84 to 144 volts (probably 120 volts maximum). A test facility utilizing a dc generator as a substitute for a battery pack was designed and utilized. Criteria for the design of such a facility are presented. Two motors, differing in design detail, commercially available for EV use were tested. Losses measured are discussed, as are waves forms and their harmonic content, the measurements of resistance and inductance, EV motor/chopper application criteria, and motor design considerations.

  6. A Reconfigurable Motor for Experimental Emulation of Stator Winding Interturn and Broken Bar Faults in Polyphase Induction Machines

    Microsoft Academic Search

    Chia-Chou Yeh; Gennadi Y. Sizov; Ahmed Sayed-Ahmed; Nabeel A. O. Demerdash; Richard J. Povinelli; Edwin E. Yaz; Dan M. Ionel

    2008-01-01

    The benefits and drawbacks of a 5-hp reconfigurable induction motor, which was designed for experimental emulation of stator winding interturn and broken rotor bar faults, are presented in this paper. It was perceived that this motor had the potential of quick and easy reconfiguration to produce the desired stator and rotor faults in a variety of different fault combinations. Hence,

  7. A Reconfigurable Motor for Experimental Emulation of Stator Winding InterTurn and Broken Bar Faults in Polyphase Induction Machines

    Microsoft Academic Search

    Chia-Chou Yehl; G. Y. Sizov; A. Sayed-Ahmed; N. A. O. Demerdash; R. J. Povinelli; E. E. Yaz; D. M. Ionel

    2007-01-01

    The advantages and demerits of a 5-hp reconfigurable induction motor, which was designed for experimental emulation of stator winding inter-turn and broken rotor bar faults, are presented in this paper. It was perceived that this motor has the potential of quick and easy reconfiguration to produce the desired stator and rotor faults in a variety of different fault combinations. Accordingly,

  8. Direct self-control (DSC) of inverter-fed induction machine

    Microsoft Academic Search

    M. Depenbrock

    1988-01-01

    The new direct self-control (DSC) is a simple method of signal processing that gives converter-fed three-phase machines an excellent dynamic performance. To control the torque of, say, an induction motor, it is sufficient to process the measured signals of the stator currents and the total flux linkages only. In the basic version of DSC, the power semiconductors of a three-phase

  9. High-precision torque control of reluctance motors

    Microsoft Academic Search

    Nobuyuki Matsui; Norihiko Akao; Tomoo Wakino

    1991-01-01

    The high-precision torque control of a reluctance motor for servo applications is described. The prototype is a three-phase, eight-pole reluctance motor driven by a MOSFET inverter. The current control and the speed control are performed by software of the digital signal processor TMS 32010. The motor is supplied by sinusoidal current, and two current control methods are proposed. One is

  10. High-performance current regulation for low inductance servo motors

    Microsoft Academic Search

    J.-O. Krah; J. Holtz

    1998-01-01

    The paper reports on a standard microcontroller implementation of a pulsewidth modulator and near-deadbeat current regulator for high switching frequency. The application is in high-performance positioning systems. The control strategy relies on a simplified machine model without incurring performance degradations. Changes between different modulation strategies are programmed depending on the modulation index. The values of switching time durations are obtained

  11. Application of nonlinear observers for rotor position detection on an induction motor using machine voltages and currents

    Microsoft Academic Search

    Robert M. Cuzner; Robert D. Lorenz; Donald W. Novotny

    1990-01-01

    The principles and operation of a unique, terminal properties-based speed and position sensing approach for induction machines are demonstrated. A closed-loop nonlinear observer is proposed which uses an analytical model to calculate, in real time, the mechanical states of rotor speed and position given the torque command to the system and the induction motor terminal voltages and line currents. The

  12. One hand clapping: lateralization of motor control

    PubMed Central

    Welniarz, Quentin; Dusart, Isabelle; Gallea, Cécile; Roze, Emmanuel

    2015-01-01

    Lateralization of motor control refers to the ability to produce pure unilateral or asymmetric movements. It is required for a variety of coordinated activities, including skilled bimanual tasks and locomotion. Here we discuss the neuroanatomical substrates and pathophysiological underpinnings of lateralized motor outputs. Significant breakthroughs have been made in the past few years by studying the two known conditions characterized by the inability to properly produce unilateral or asymmetric movements, namely human patients with congenital “mirror movements” and model rodents with a “hopping gait”. Whereas mirror movements are associated with altered interhemispheric connectivity and abnormal corticospinal projections, abnormal spinal cord interneurons trajectory is responsible for the “hopping gait”. Proper commissural axon guidance is a critical requirement for these mechanisms. Interestingly, the analysis of these two conditions reveals that the production of asymmetric movements involves similar anatomical and functional requirements but in two different structures: (i) lateralized activation of the brain or spinal cord through contralateral silencing by cross-midline inhibition; and (ii) unilateral transmission of this activation, resulting in lateralized motor output.

  13. A Position Sensorless Control Method for SRM Based on Variation of Phase Inductance

    NASA Astrophysics Data System (ADS)

    Komatsuzaki, Akitomo; Miki, Ichiro

    Switched reluctance motor (SRM) drives are suitable for variable speed industrial applications because of the simple structure and high-speed capability. However, it is necessary to detect the rotor position with a position sensor attached to the motor shaft. The use of the sensor increases the cost of the drive system and machine size, and furthermore the reliability of the system is reduced. Therefore, several approaches to eliminate the position sensor have already been reported. In this paper, a position sensorless control method based on the variation of the phase inductance is described. The phase inductance regularly varies with the rotor position. The SRM is controlled without the position sensor using the de-fluxing period and the phase inductance. The turn-off timing is determined by computing the difference of angle between the sampling point and the aligned point and the variation of angle during the de-fluxing period. In the magnetic saturation region, the phase inductance at the current when the effect of the saturation starts is computed and the sensorless control can be carried out using this inductance. Experimental results show that the SRM is well controlled without the position sensor using the proposed method.

  14. DSP-Based Field-Oriented Hybrid Step Motor Control

    Microsoft Academic Search

    Ziqing Ye; Min Chen

    2010-01-01

    The basic advantage of stepper motors over other types of motors is that it can be driven by digital and open-loop control. However an open loop control shows a poor dynamic performance and is insufficient in precise motions which require a high dynamic, so a closed loop control is required. This paper describes field oriented control which will improve the

  15. Effect of motor dynamics on nonlinear feedback robot arm control

    Microsoft Academic Search

    Tzyh-Jong Tarn; A. K. Bejczy; Xiaoping Yun; Z. Li

    1991-01-01

    A nonlinear feedback robot controller that incorporates the robot manipulator dynamics and the robot joint motor dynamics is proposed. The manipulator dynamics and the motor dynamics are coupled to obtain a third-order-dynamic model, and differential geometry control theory is applied to produce a linearized and decoupled robot controller. The derived robot controller operates in the robot task space, thus eliminating

  16. A critical evaluation of the force control hypothesis in motor control

    Microsoft Academic Search

    David J. Ostry; Anatol G. Feldman

    2003-01-01

    The ability to formulate explicit mathematical models of motor systems has played a central role in recent progress in motor control research. As a result of these modeling efforts and in particular the incorporation of concepts drawn from control systems theory, ideas about motor control have changed substantially. There is growing emphasis on motor learning and particularly on predictive or

  17. The Basal Ganglia and Adaptive Motor Control

    NASA Astrophysics Data System (ADS)

    Graybiel, Ann M.; Aosaki, Toshihiko; Flaherty, Alice W.; Kimura, Minoru

    1994-09-01

    The basal ganglia are neural structures within the motor and cognitive control circuits in the mammalian forebrain and are interconnected with the neocortex by multiple loops. Dysfunction in these parallel loops caused by damage to the striatum results in major defects in voluntary movement, exemplified in Parkinson's disease and Huntington's disease. These parallel loops have a distributed modular architecture resembling local expert architectures of computational learning models. During sensorimotor learning, such distributed networks may be coordinated by widely spaced striatal interneurons that acquire response properties on the basis of experienced reward.

  18. ACTIVE CONTROL STICK DRIVEN BY A PIEZO ELECTRIC MOTOR

    Microsoft Academic Search

    T. Schulte; H. Grotstollen; H.-P. Schöner; J.-T. Audren

    1999-01-01

    An Active Control Stick (ACS) realized by a travelling wave type ultrasonic motor (USM) is presented. In contrast to the conventional side stick in modern aircrafts, which is only operated by a passive mechanic feedback, forces can be reproduced artificially by an active con- trol stick. Ultrasonic motors are more compact as conventional electrical geared motors and combine features such

  19. Control of permanent magnet AC servo motors via fuzzy reasoning

    Microsoft Academic Search

    Dong-Il Kim; Jin-Won Lee; Sung Kwun Kim

    1992-01-01

    A control method which drives the permanent magnet AC servomotor without the detection of the rotor position by an absolute position transducer such as an absolute encoder or a resolver is described. An incremental encoder is only coupled to the motor shaft in order to obtain the information for electrical commutation, motor speed, and motor position. A fuzzy algorithm based

  20. Proprioception and Motor Control in Parkinson's Disease

    Microsoft Academic Search

    Jürgen Konczak; Daniel M. Corcos; Fay Horak; Howard Poizner; Mark Shapiro; Paul Tuite; Jens Volkmann; Matthias Maschke

    2009-01-01

    Parkinson's disease (PD) is a neurodegenerative disorder that leads to a progressive decline in motor function. Growing evidence indicates that PD patients also experience an array of sensory problems that negatively impact motor function. This is especially true for proprioceptive deficits, which profoundly degrade motor performance. This review specifically address the relation between proprioception and motor impairments in PD. It

  1. A high temperature superconducting induction/synchronous motor with a ten-fold improvement in torque density

    NASA Astrophysics Data System (ADS)

    Nakamura, T.; Matsumura, K.; Nishimura, T.; Nagao, K.; Yamada, Y.; Amemiya, N.; Itoh, Y.; Terazawa, T.; Osamura, K.

    2011-01-01

    In this paper, the enhancement of the torque density in a high temperature superconductor (HTS) induction/synchronous machine is experimentally and theoretically investigated by the use of Bi-2223 windings. The basic structure of this machine is the same as that of a conventional squirrel-cage induction motor, and the secondary windings are replaced by the superconducting tapes. Firstly, quantitative values of the enhanced torque are measured in an experiment using a fabricated motor at 77 K. Then, such a torque result is theoretically confirmed based upon the analytical expression, which is derived from the nonlinear electrical equivalent circuit. It is shown that the theoretical and experimental results agree well with each other, and the torque value drastically increases by more than ten times compared to the conventional induction motor. These results indicate that it is possible to realize a compact sized high efficiency HTS motor in a simple structure.

  2. Roles of the orexin system in central motor control.

    PubMed

    Hu, Bo; Yang, Nian; Qiao, Qi-Cheng; Hu, Zhi-An; Zhang, Jun

    2015-02-01

    The neuropeptides orexin-A and orexin-B are produced by one group of neurons located in the lateral hypothalamic/perifornical area. However, the orexins are widely released in entire brain including various central motor control structures. Especially, the loss of orexins has been demonstrated to associate with several motor deficits. Here, we first summarize the present knowledge that describes the anatomical and morphological connections between the orexin system and various central motor control structures. In the next section, the direct influence of orexins on related central motor control structures is reviewed at molecular, cellular, circuitry, and motor activity levels. After the summarization, the characteristic and functional relevance of the orexin system's direct influence on central motor control function are demonstrated and discussed. We also propose a hypothesis as to how the orexin system orchestrates central motor control in a homeostatic regulation manner. Besides, the importance of the orexin system's phasic modulation on related central motor control structures is highlighted in this regulation manner. Finally, a scheme combining the homeostatic regulation of orexin system on central motor control and its effects on other brain functions is presented to discuss the role of orexin system beyond the pure motor activity level, but at the complex behavioral level. PMID:25511388

  3. DSP-based adaptive control of a brushless motor

    Microsoft Academic Search

    N. Matsui; H. Ohashi

    1992-01-01

    The software control of a brushless DC motor with parameter identification is presented. Not only speed and current controls but also a real-time identification of the motor parameters can be implemented by software using the digital signal processor (DSP) TMS320C25. The unique current control is performed according to an instantaneous voltage equation of a d-q model of the motor. Because

  4. A motor drive control system for the Lidar Polarimeter

    E-print Network

    Leung, Waiming

    1977-01-01

    A MOTOR DRIVE CONTROL SYSTEM FOR THE LIDAR POLARIMETER A Thesis by Waiming Leung Submitted to the Graduate College of Texas A/M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCF, May 1977 Major... Subject: Electrical Engineering A MOTOR DRIVE CONTROL SYSTEM FOR THE LIDAR POLARIMETER A Thesis by Waiming Leung Approved as to style and content by: Chairman o Comm' ee ea o epartment Member Mem er May 1977 ABSTRACT A Motor Drive Control...

  5. A new diagnosis of broken rotor bar fault extent in three phase squirrel cage induction motor

    NASA Astrophysics Data System (ADS)

    Shi, Pu; Chen, Zheng; Vagapov, Yuriy; Zouaoui, Zoubir

    2014-01-01

    This paper proposes a new induction motor broken bar fault extent diagnostic approach under varying load conditions based on wavelet coefficients of stator current in a specific frequency band. In this paper, winding function approach (WFA) is used to develop a mathematical model to provide indication references for parameters under different load levels and different fault cases. It is shown that rise of number of broken bars and load levels increases amplitude of the particular side band components of the stator currents in faulty case. Stator current, rotor speed and torque are used to demonstrate the relationship between these parameters and broken rotor bar severity. An induction motor with 1, 2 and 3 broken bars and the motor with 3 broken bars in experiment at no-load, 50% and 100% load are investigated. A novel criterion is then developed to assess rotor fault severity based on the stator current and the rotor speed. Simulations and experimental results confirm the validity of the proposed approach.

  6. Road load simulator tests of the Gould phase 1 functional model silicon controlled rectifier ac motor controller for electric vehicles. Final Report

    Microsoft Academic Search

    Gourash

    1984-01-01

    The test results for a functional model ac motor controller for electric vehicles and a three-phase induction motor which were dynamically tested on the Lewis Research Center road load simulator are presented. Results show that the controller has the capability to meet the SAE-J227a D cycle test schedule and to accelerate a 1576-kg (3456-lb) simulated vehicle to a cruise speed

  7. Design of fuzzy controller for induction heating using DSP

    Microsoft Academic Search

    Chin-Hsing Cheng

    2010-01-01

    This paper presents the development of fuzzy controller for induction heating temperature control. Induction heating coil can be controlled by single phase sinusoidal pulse width modulation (SPWM) digital signal processor (DSP)-based inverter. DSP is used to store the required commands for generating the necessary waveforms to control the frequency of the inverter through proper design of switching pulses. The SPWM

  8. Permanent Magnet DC Motor Sliding Mode Control System

    NASA Astrophysics Data System (ADS)

    Vaez-Zadeh, S.; Zamanian, M.

    2000-09-01

    In this paper a sliding mode controller (SMC) is designed for a permanent magnet, direct current (PMDC) motor to enhance the motor performance in the presence of unwanted uncertainties. Both the electrical and mechanical signals are used as the inputs to the SMC. The complete motor control system is simulated on a personal computer with different design parameters and desirable system performance is obtained. The experimental implementation of the motor control system is also presented. The test results confirm the simulation results and validate the proposed control system.

  9. Road load simulator tests of the Gould phase 1 functional model silicon controlled rectifier ac motor controller for electric vehicles

    NASA Astrophysics Data System (ADS)

    Gourash, F.

    1984-02-01

    The test results for a functional model ac motor controller for electric vehicles and a three-phase induction motor which were dynamically tested on the Lewis Research Center road load simulator are presented. Results show that the controller has the capability to meet the SAE-J227a D cycle test schedule and to accelerate a 1576-kg (3456-lb) simulated vehicle to a cruise speed of 88.5 km/hr (55 mph). Combined motor controller efficiency is 72 percent and the power inverter efficiency alone is 89 percent for the cruise region of the D cycle. Steady state test results for motoring, regeneration, and thermal data obtained by operating the simulator as a conventional dynamometer are in agreement with the contractor's previously reported data. The regeneration test results indicate that a reduction in energy requirements for urban driving cycles is attainable with regenerative braking. Test results and data in this report serve as a data base for further development of ac motor controllers and propulsion systems for electric vehicles. The controller uses state-of-the-art silicon controlled rectifier (SCR) power semiconductors and microprocessor-based logic and control circuitry. The controller was developed by Gould Laboratories under a Lewis contract for the Department of Energy's Electric and Hybrid Vehicle program.

  10. Fuzzy logic control of a switched reluctance motor drive

    Microsoft Academic Search

    Silverio Bolognani; Mauro Zigliotto

    1996-01-01

    The paper deals with the fuzzy logic control of a switched reluctance motor (SRM) drive. The fundamentals of the fuzzy logic are first illustrated, pointing out the aspects related to the control under consideration. A fuzzy logic controller (FLC) of the motor speed is then designed and simulated. The results show that the use of an FLC in the speed

  11. Fuzzy logic control for switched reluctance motor drive

    Microsoft Academic Search

    Hao Chen; Dong Zhang; Zi-Yue Cong; Zhi-Feng Zhang

    2002-01-01

    This paper introduces the control strategy of the angle position for the switched reluctance motor drive based on fuzzy logic. The hardware of the prototype, such as the structure of the switched reluctance motor and the main circuit of the four-phase asymmetric bridge power converter are introduced. The principles of the fuzzy logic control are given. The input control parameters,

  12. Altered motor control patterns in whiplash and chronic neck pain

    Microsoft Academic Search

    Astrid Woodhouse; Ottar Vasseljen

    2008-01-01

    BACKGROUND: Persistent whiplash associated disorders (WAD) have been associated with alterations in kinesthetic sense and motor control. The evidence is however inconclusive, particularly for differences between WAD patients and patients with chronic non-traumatic neck pain. The aim of this study was to investigate motor control deficits in WAD compared to chronic non-traumatic neck pain and healthy controls in relation to

  13. Linearity, motor primitives and low-dimensionality in the spinal organization of motor control

    E-print Network

    Berniker, Max (Max Sam), 1971-

    2005-01-01

    The typical biological system is nonlinear, high-dimensional and highly redundant, all of which are burdens on controller design. Yet despite these complications, the central nervous system is able to control motor systems ...

  14. Real Time Flux Control in PM Motors

    SciTech Connect

    Otaduy, P.J.

    2005-09-27

    Significant research at the Oak Ridge National Laboratory (ORNL) Power Electronics and Electric Machinery Research Center (PEEMRC) is being conducted to develop ways to increase (1) torque, (2) speed range, and (3) efficiency of traction electric motors for hybrid electric vehicles (HEV) within existing current and voltage bounds. Current is limited by the inverter semiconductor devices' capability and voltage is limited by the stator wire insulation's ability to withstand the maximum back-electromotive force (emf), which occurs at the upper end of the speed range. One research track has been to explore ways to control the path and magnitude of magnetic flux while the motor is operating. The phrase, real time flux control (RTFC), refers to this mode of operation in which system parameters are changed while the motor is operating to improve its performance and speed range. RTFC has potential to meet an increased torque demand by introducing additional flux through the main air gap from an external source. It can augment the speed range by diverting flux away from the main air gap to reduce back-emf at high speeds. Conventional RTFC technology is known as vector control [1]. Vector control decomposes the stator current into two components; one that produces torque and a second that opposes (weakens) the magnetic field generated by the rotor, thereby requiring more overall stator current and reducing the efficiency. Efficiency can be improved by selecting a RTFC method that reduces the back-emf without increasing the average current. This favors methods that use pulse currents or very low currents to achieve field weakening. Foremost in ORNL's effort to develop flux control is the work of J. S. Hsu. Early research [2,3] introduced direct control of air-gap flux in permanent magnet (PM) machines and demonstrated it with a flux-controlled generator. The configuration eliminates the problem of demagnetization because it diverts all the flux from the magnets instead of trying to oppose it. It is robust and could be particularly useful for PM generators and electric vehicle drives. Recent efforts have introduced a brushless machine that transfers a magneto-motive force (MMF) generated by a stationary excitation coil to the rotor [4]. Although a conventional PM machine may be field weakened using vector control, the air-gap flux density cannot be effectively enhanced. In Hsu's new machine, the magnetic field generated by the rotor's PM may be augmented by the field from the stationery excitation coil and channeled with flux guides to its desired destination to enhance the air-gap flux that produces torque. The magnetic field can also be weakened by reversing the current in the stationary excitation winding. A patent for advanced technology in this area is pending. Several additional RTFC methods have been discussed in open literature. These include methods of changing the number of poles by magnetizing and demagnetizing the magnets poles with pulses of current corresponding to direct-axis (d-axis) current of vector control [5,6], changing the number of stator coils [7], and controlling the air gap [8]. Test experience has shown that the magnet strengths may vary and weaken naturally as rotor temperature increases suggesting that careful control of the rotor temperature, which is no easy task, could yield another method of RTFC. The purpose of this report is to (1) examine the interaction of rotor and stator flux with regard to RTFC, (2) review and summarize the status of RTFC technology, and (3) compare and evaluate methods for RTFC with respect to maturity, advantages and limitations, deployment difficulty and relative complexity.

  15. Identification of significant intrinsic mode functions for the diagnosis of induction motor fault.

    PubMed

    Cho, Sangjin; Shahriar, Md Rifat; Chong, Uipil

    2014-08-01

    For the analysis of non-stationary signals generated by a non-linear process like fault of an induction motor, empirical mode decomposition (EMD) is the best choice as it decomposes the signal into its natural oscillatory modes known as intrinsic mode functions (IMFs). However, some of these oscillatory modes obtained from a fault signal are not significant as they do not bear any fault signature and can cause misclassification of the fault instance. To solve this issue, a novel IMF selection algorithm is proposed in this work. PMID:25096149

  16. Modeling and Simulation of Switched Reluctance Motor Double Closed Loop Control System

    Microsoft Academic Search

    Suying Zhou; Hui Lin

    2006-01-01

    This paper presents the modeling, simulation, and speed control aspects of a 3-phase 6\\/4 switched reluctance motor (SRM) drives. Fourier series expression of phase self-inductance under the assumption of negligible mutual effect and various losses is introduced to describe the nonlinear dynamic model of SRM. By virtue of Matlab\\/Simulink, the models of various subsystems are achieved and the modeling procedure

  17. Motor control of Drosophila courtship song

    PubMed Central

    Shirangi, Troy R.; Stern, David L.; Truman, James W.

    2014-01-01

    SUMMARY Many animals utilize acoustic signals – or songs – to attract mates. During courtship, Drosophila melanogaster males vibrate a wing to produce trains of pulses and extended tone called pulse and sine song, respectively. Courtship songs in the genus Drosophila are exceedingly diverse and different song features appear to have evolved independently of each other. How the nervous system allows such diversity to evolve is not understood. Here, we identify a wing muscle in D. melanogaster (hg1) that is uniquely male-enlarged. The hg1 motoneuron and the sexually dimorphic development of the hg1 muscle are required specifically for the sine component of the male song. In contrast, the motoneuron innervating a sexually monomorphic wing muscle, ps1, is required specifically for a feature of pulse song. Thus, individual wing motor pathways can control separate aspects of courtship song and may provide a “modular” anatomical substrate for the evolution of diverse songs. PMID:24183665

  18. Design of BLDC motor controller for electric power wheelchair

    Microsoft Academic Search

    Jun-Uk Chu; In-Hyuk Moon; Gi-Won Choi; Jei-Cheong Ryu; Mu-Seong Mun

    2004-01-01

    We introduce a design and implementation of BLDC motor controller for an electric power wheelchair. The control architecture consists of two layers of feedback control, namely the wheelchair posture control and the wheel velocity control. In the higher level of control architecture, the posture controller works as a reference velocity generator for two wheels. We realize the joystick interface and

  19. 26. LOOKING SOUTH AT THE MOTOR CONTROL SWITCHING PANEL FOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. LOOKING SOUTH AT THE MOTOR CONTROL SWITCHING PANEL FOR BASIC OXYGEN FURNACE No. 2 IN THE BOP SHOP'S MOTOR CONTROL CENTER No. 2 ON THE GROUND FLOOR OF THE FURNACE AISLE. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

  20. Precision microstepping system for bipolar stepper motor control

    Microsoft Academic Search

    G. Baluta; M. Coteata

    2007-01-01

    The paper presents a high performance system for stepper motor control in a microstepping mode, which was designed and performed with high-performed dedicated integrated circuits IXMS 150 PSI, made by IXYS SEMICONDUCTOR Company. The microstepping control system improves the positioning accuracy and eliminates low speed ripple and resonance effects in a stepper motor electrical drive. The same microstepping system is

  1. Controlling An Inverter-Driven Three-Phase Motor

    NASA Technical Reports Server (NTRS)

    Dolland, C.

    1984-01-01

    Control system for three-phase permanent-magnet motor driven by linecommutated inverter uses signals generated by integrating back emf of each phase of motor. High-pass filter network eliminates low-frequency components from control loop while maintaining desired power factor.

  2. A COMPUTATIONAL APPROACH TO HUMAN ADAPTIVE MOTOR CONTROL

    E-print Network

    Shadmehr, Reza

    A COMPUTATIONAL APPROACH TO HUMAN ADAPTIVE MOTOR CONTROL Nikhil Bhushan Dept. of Biomedical in Engineering August 25, 1998 #12;Abstract The aim of this thesis is to understand the computational process that underlie adaptive motor control capabilities of humans based on the study of reaching movements of the arm

  3. Control of the position DC servo motor by fuzzy logic

    Microsoft Academic Search

    N. Khongkoom; A. Kanchanathep; S. Nopnakeepong; S. Tanuthong; S. Tunyasrirut; R. Kagawa

    2000-01-01

    Presents a fuzzy logic controller for controlling the position of a DC servo motor. The position of the angle location is limited at -? to ? radian. The fuzzy inference engine uses angle position from an angular position sensor, and angular velocity. The DC servo motor revolves the circle of axis at the number of revolutions corresponding to the binding

  4. Improved SCR ac Motor Controller for Battery Powered Urban Electric Vehicles

    NASA Technical Reports Server (NTRS)

    Latos, T. S.

    1982-01-01

    An improved ac motor controller, which when coupled to a standard ac induction motor and a dc propulsion battery would provide a complete electric vehicle power train with the exception of the mechanical transmission and drive wheels was designed. In such a system, the motor controller converts the dc electrical power available at the battery terminals to ac electrical power for the induction motor in response to the drivers commands. The performance requirements of a hypothetical electric vehicle with an upper weight bound of 1590 kg (3500 lb) were used to determine the power rating of the controller. Vehicle acceleration capability, top speed, and gradeability requisites were contained in the Society of Automotive Engineers (SAE) Schedule 227a(d) driving cycle. The important capabilities contained in this driving cycle are a vehicle acceleration requirement of 0 to 72.4 kmph (0 to 45 mph) in 28 seconds a top speed of 88.5 kmph (55 mph), and the ability to negotiate a 10% grade at 48 kmph (30 mph). A 10% grade is defined as one foot of vertical rise per 10 feet of horizontal distance.

  5. Microcomputer control of an electronically commutated dc motor

    NASA Astrophysics Data System (ADS)

    El-Sharkawi, M. A.; Coleman, J. S.; Mehdi, I. S.; Sommer, D. L.

    A microcomputer control system for an electronically commutated dc motor (ECM) has been designed, built and tested. A 3-hp, 270-volt, samarium-cobalt brushless dc motor is controlled by an Intel 8086-based microcomputer. The main functions of the microcomputer are to control the speed of the motor, to provide forward or reverse rotation, to brake, and to protect the motor and its power electronic switching circuits from overcurrents. The necessary interface circuits were designed and built, and the system components have been integrated and tested. It is shown that the proposed ECM system with the microcomputer control operate the motor reliably over a wide range of speeds. The purpose of this effort is to develop the motorcontroller for driving electromechanical actuators for flight control and other aircraft applications.

  6. Design and implementation of all FPGA-based motor control IC for permanent magnet AC servo motors

    Microsoft Academic Search

    Ying-Yu Tzou; Tien-Sung Kuo

    1997-01-01

    This paper presents the design and implementation of a motor control IC for permanent magnet AC (PMAC) servo motors using the field programmable gate array (FPGA). This paper develops a hardware architecture for the digital control of PMAC servo motors. The proposed control structure has also been realized using FPGAs from Xilinx Inc. All the control functions, including the PWM

  7. A unifying computational framework for motor control and social interaction.

    PubMed Central

    Wolpert, Daniel M; Doya, Kenji; Kawato, Mitsuo

    2003-01-01

    Recent empirical studies have implicated the use of the motor system during action observation, imitation and social interaction. In this paper, we explore the computational parallels between the processes that occur in motor control and in action observation, imitation, social interaction and theory of mind. In particular, we examine the extent to which motor commands acting on the body can be equated with communicative signals acting on other people and suggest that computational solutions for motor control may have been extended to the domain of social interaction. PMID:12689384

  8. Motor control and the management of musculoskeletal dysfunction

    Microsoft Academic Search

    Paulette M. van Vliet; Nicola R. Heneghan

    2006-01-01

    This paper aims to develop understanding of three important motor control issues—feedforward mechanisms, cortical plasticity and task-specificity and assess the implications for musculoskeletal practice.A model of control for the reach-to-grasp movement illustrates how the central nervous system integrates sensorimotor processes to control complex movements. Feedforward mechanisms, an essential element of motor control, are altered in neurologically intact patients with chronic

  9. Switched Reluctance Motor Drive for Electric Motorcycle Using HFNN Controller

    Microsoft Academic Search

    Chih-Hong Lin

    2007-01-01

    The switched reluctance motor (SRM) drive system using hybrid fuzzy neural network (HFNN) controller is developed to control electric motorcycle in this paper. First, the dynamic models of a SRM drive system and electric motorcycle are builted though experimental tests and parameters measurements. Then, a HFNN speed control system that combined supervisor control, FNN control and compensated control is developed

  10. ARDOLORES: an Arduino based motors control system for DOLORES

    NASA Astrophysics Data System (ADS)

    Gonzalez, Manuel; Ventura, H.; San Juan, J.; Di Fabrizio, L.

    2014-07-01

    We present ARDOLORES a custom made motor control system for the DOLORES instrument in use at the TNG telescope. ARDOLORES replaced the original PMAC based motor control system at a fraction of the cost. The whole system is composed by one master Arduino ONE with its Ethernet shield, to handle the communications with the external world through an Ethernet socket, and by one Arduino ONE with its custom motor shield for each axis to be controlled. The communication between the master and slaves Arduinos is made possible through the I2C bus. Also a Java web-service has been written to control the motors from an higher level and provides an external API for the scientific GUI. The system has been working since January 2012 handling the DOLORES motors and has demonstrated to be stable, reliable, and with easy maintenance in both the hardware and the software parts.

  11. Robust control of linear ceramic motor drive with LLCC resonant technique.

    PubMed

    Wai, Rong-Jong

    2003-07-01

    This study presents a robust control system for a linear ceramic motor (LCM) that is driven by a high-frequency voltage source inverter using two-inductance two-capacitance (LLCC) resonant technique. The structure and driving principle of the LCM are introduced. Because the dynamic characteristics and motor parameters of the LCM are nonlinear and time varying, a robust control system is designed based on the hypothetical dynamic model to achieve high-precision position control. The presentation of robust control for the LCM drive system is divided into three parts, which comprise state feedback controller, feed-forward controller, and uncertainty controller. The adaptation laws of control gains in the robust control system are derived in the sense of Lyapunov stability theorem such that the stability of the control system can be guaranteed. It not only has the learning ability similar to intelligent control, but also its control framework is more simple than intelligent control. With the proposed robust control system, the controlled LCM drive possesses the advantages of good tracking control performance and robustness to uncertainties. The effectiveness of the proposed robust control system is verified by experimental results in the presence of uncertainties. In addition, the advantages of the proposed control system are indicated in comparison with the traditional integral-proportional (IP) position control system. PMID:12894924

  12. Motor Modeling and Position Control Lab Week 3: Closed Loop Control

    E-print Network

    Krovi, Venkat

    of the DC servo motor is given in Fig.11. You should remember that simulation of these two forms characteristics of typical 2nd order systems. Figure 1: Open Loop Control of DC Servo Motor 3. TransientMotor Modeling and Position Control Lab Week 3: Closed Loop Control 1. Review In the first week

  13. Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Concentrated Windings

    SciTech Connect

    Lawler, J.S.

    2005-12-21

    It is well known that the ability of the permanent magnet synchronous machine (PMSM) to operate over a wide constant power speed range (CPSR) is dependent upon the machine inductance [1,2,3,4,5]. Early approaches for extending CPSR operation included adding supplementary inductance in series with the motor [1] and the use of anti-parallel thyristor pairs in series with the motor-phase windings [5]. The increased inductance method is compatible with a voltage-source inverter (VSI) controlled by pulse-width modulation (PWM) which is called the conventional phase advance (CPA) method. The thyristor method has been called the dual mode inverter control (DMIC). Neither of these techniques has met with wide acceptance since they both add cost to the drive system and have not been shown to have an attractive cost/benefit ratio. Recently a method has been developed to use fractional-slot concentrated windings to significantly increase the machine inductance [6]. This latest approach has the potential to make the PMSM compatible with CPA without supplemental external inductance. If the performance of such drive is acceptable, then the method may make the PMSM an attractive option for traction applications requiring a wide CPSR. A 30 pole, 6 kW, 6000 maximum revolutions per minute (rpm) prototype of the fractional-slot PMSM design has been developed [7]. This machine has significantly more inductance than is typical of regular PMSMs. The prototype is to be delivered in late 2005 to the Oak Ridge National Laboratory (ORNL) for testing and development of a suitable controller. In advance of the test/control development effort, ORNL has used the PMSM models developed over a number of previous studies to study the steady-state performance of high-inductance PMSM machines with a view towards control issues. The detailed steady-state model developed includes all motor and inverter-loss mechanisms and will be useful in assessing the performance of the dynamic controller to be developed in future work. This report documents the results of this preliminary investigation.

  14. Recurrent neural network control for LCC-resonant ultrasonic motor drive.

    PubMed

    Lin, F J; Wai, R J; Hong, C M

    2000-01-01

    A newly designed driving circuit for the traveling wave-type ultrasonic motor (USM), which consists of a push-pull DC-DC power converter and a two-phase voltage source inverter using one inductance and two capacitances (LCC) resonant technique, is presented in this study. Moreover, because the dynamic characteristics of the USM are difficult to obtain and the motor parameters are time varying, a recurrent neural network (RNN) controller is proposed to control the USM drive system. In the proposed controller, the dynamic backpropagation algorithm is adopted to train the RNN on-line using the proposed delta adaptation law. Furthermore, to guarantee the convergence of tracking error, analytical methods based on a discrete-type Lyapunov function are proposed to determine the varied learning rates for the training of the RNN. Finally, the effectiveness of the RNN-controlled USM drive system is demonstrated by some experimental results. PMID:18238603

  15. Current issues in directional motor control

    Microsoft Academic Search

    Apostolos P. Georgopoulos

    1995-01-01

    Many studies during the past 15 years have shown that the direction of motor output (movement or isometric force) is an important factor for neuronal activity in the motor cortex, both at the level of single cells and at the level of neuronal populations. Recent studies have investigated several new aspects of this problem including the effect of posture, the

  16. Traffic control: regulation of kinesin motors

    Microsoft Academic Search

    Jennetta W. Hammond; Kristen J. Verhey

    2009-01-01

    Kinesins are a family of molecular motors that use the energy of ATP hydrolysis to move along the surface of, or destabilize, microtubule filaments. Much progress has been made in understanding the mechanics and functions of the kinesin motors that play important parts in cell division, cell motility, intracellular trafficking and ciliary function. How kinesins are regulated in cells to

  17. Control Performance of an Air Motor: Can Air Motors Replace Electric Motors?

    Microsoft Academic Search

    Shunmugham R. Pandian; F. Takemura; Yasuhiro Hayakawa; Sadao Kawamura

    1999-01-01

    Pneumatic actuators are among a variety of actuators under active study by the robotics community, for the advantages they offer over conventional electric actuators widely used in present-day robots. So far, however, only pneumatic cylinders which provide linear actuation have been mainly studied in literature. Air motors are the pneumatic counterparts of electric motors, providing rotary actuation. They have several

  18. XRF inductive bead fusion and PLC based control system

    Microsoft Academic Search

    Jin-hong Zhu; Ying-jie Wang; Hong-xin Shi; Qing-ling Chen; Yu-xi Chen

    2009-01-01

    In order to ensure high-quality X-ray fluorescence spectrometry (XRF) analysis, an inductive bead fusion machine was developed.\\u000a The prototype consists of super-audio IGBT induction heating power supply, rotation and swing mechanisms, and programmable\\u000a logic controller (PLC). The system can realize sequence control, mechanical movement control, output current and temperature\\u000a control. Experimental results show that the power supply can operate at

  19. Simulation on parallel drive system of double Switched Reluctance motors based on sliding mode & fuzzy controllers

    Microsoft Academic Search

    H. Chen; X. Wang; J. J. Gu; Q. Song

    2010-01-01

    The paper presented a control scheme for parallel drive system of double Switched Reluctance motors. The sliding mode control algorithm is adopted in the main controller for closed-loop rotor speed control of main motor. The fuzzy control algorithm is adopted in the subordinate controller for synchronized rotor speed and loads equilibrium distribution between main motor and subordinate motor. The given

  20. DSP-Based Field-Oriented Step Motor Control Cleveland State University

    E-print Network

    Simon, Dan

    . The firmware in the SMC3 DSP drives the step motor phase wind- ings using field-oriented control rather than. FIELD-ORIENTED MOTOR CONTROL The step motors driven by the SMC3 are two-phase motors; they have two sets1 DSP-Based Field-Oriented Step Motor Control Dan Simon Cleveland State University 1960 East 24th

  1. CONTROL OF MOTOR VEHICLE EMISSIONS - THE U.S. EXPERIENCE

    EPA Science Inventory

    An historical overview of the U.S. experience with controlling emissions from highway motor vehicles is presented. he evolution of new motor vehicle emissions certification practice, end-of-assembly-line inspection, in-use surveillance and recall, inspection and maintenance, and ...

  2. The Design of Microcomputer Control System for Step Motor

    Microsoft Academic Search

    Tianxing Meng; Lanlan Yu

    2009-01-01

    The paper gives a control system for step motor with the core of AT89C51 singlechip. The system design includes hardware design and software design and the circuit design contains keyboard input, LED display, the state display of light emitting diode and alarm. The keyboard can be used to input operation parameters, start and close system. The motor drives the load

  3. Impulsive control of permanent magnet synchronous motors with parameters uncertainties

    Microsoft Academic Search

    Dong Li; Shi-Long Wang; Xiao-Hong Zhang; Dan Yang; Hui Wang

    2008-01-01

    The permanent magnet synchronous motors (PMSMs) may have chaotic behaviours for the uncertain values of parameters or under certain working conditions, which threatens the secure and stable operation of motor-driven. It is important to study methods of controlling or suppressing chaos in PMSMs. In this paper, robust stabilities of PMSM with parameter uncertainties are investigated. After the uncertain matrices which

  4. Velocity profile algorithm realization on FPGA for stepper motor controller

    Microsoft Academic Search

    Wang Bangji; Liu Qingxiang; Zhou Lei; Zhang Yanrong; Li Xiangqiang; Zhang Jianqiong

    2011-01-01

    In order to optimize the open loop control strategy of stepper motor, the velocity profiles of stepper motor were studied. There are three widespread used velocity profiles: trapezoidal, parabolic, and S-curve profiles. In this paper, trapezoidal velocity profile was chosen for further study. In order to accurately generate an arbitrary trapezoidal velocity profile, a new velocity profile generation methodology is

  5. On independent position\\/gap control of a spiral motor

    Microsoft Academic Search

    Issam A. Smadi; Hiroko Omori; Yasutaka Fujimoto

    2010-01-01

    This paper presents a full direct-drive motion of a spiral motor. Spiral motor, is a novel high thrust force actuator with high backdrivability, consists of a spiral structure mover and stator. The mover moves spirally in the stator, and the linear motion is extracted to drive the load. A proper gap control against the load fluctuation is needed to achieve

  6. An active biopolymer network controlled by molecular motors

    Microsoft Academic Search

    G. H. Koenderink; Z. Dogic; F. Nakamura; P. M. Bendix; F. C. Mackintosh; J. H. Hartwig; T. P. Stossel; D. A. Weitz

    2009-01-01

    We describe an active polymer network in which processive molecular motors control network elasticity. This system consists of actin filaments cross-linked by filamin A (FLNa) and contracted by bipolar filaments of muscle myosin II. The myosin motors stiffen the network by more than two orders of magnitude by pulling on actin filaments anchored in the network by FLNa cross-links, thereby

  7. Electric motor drives and control-past, present, and future

    Microsoft Academic Search

    PARESH C. SEN

    1990-01-01

    A comprehensive review of the state of the art in the field of electric motor drives and control strategies is presented. It is pointed out that drive technology has seen impressive growth during the last three decades. Recent advances in semiconductor power electronics and microelectronics have made is possible to use AC motors in many variable-speed drive applications. Implementation of

  8. DSP-based adaptive control of a brushless motor

    Microsoft Academic Search

    Nobuyuki Matsui; Hironori Ohashi

    1988-01-01

    The authors present a method for the software control of a brushless DC motor using parameter identification. Not only speed and current controls, but also a real-time identification of the motor parameter can be implemented by the software, implemented on the digital signal processor (DSP) TMS320C25. The unique current control is performed according to an instantaneous voltage equation of the

  9. Sensorless-control of the synchronous reluctance motor

    Microsoft Academic Search

    Rolf Lagerquist; Ion Boldea; Tim J. E. Miller

    1994-01-01

    In this paper a sensorless closed-loop speed control for the synchronous reluctance motor is presented. The sensorless control is based on the torque vector control algorithm. It has been implemented using a high-speed digital processor DSP96002. Experimental results for a 120 W axially-laminated synchronous reluctance motor are presented and compared with operation with a speed sensor and simulations. A base

  10. Consideration of space harmonics in complex finite element analysis of induction motors with an air-gap interface coupling

    Microsoft Academic Search

    Y. Ouazir; N. Takorabet; R. Ibtiouen; S. Mezani

    2006-01-01

    A method for coupling the stator and rotor fields of induction motors in time harmonic finite element (FE) analysis with consideration of space harmonics is presented. The coupling scheme is derived from Fourier series of the magnetic vector potential at air-gap interface conditions. A transformation technique is used to introduce the coupling scheme in the saturated time harmonic FEs model

  11. Adaptive neuro-fuzzy inference system for bearing fault detection in induction motors using temperature, current, vibration data

    Microsoft Academic Search

    Malik S. Yilmaz; Emine Ayaz

    2009-01-01

    In this study the features for bearing fault diagnosis is investigated based on the analysis of temperature, vibration and current measurements of a 3 phase, 4 poles, 5 HP induction motors which are chemically, thermally and electrically aged by artificial aging methods. Then three adaptive neuro-fuzzy inference systems which takes the temperature, current and vibration measurements as inputs and the

  12. Analysis of currents and an electromagnetic torque in steady states of induction squirrel-cage motors with asymmetric stator windings

    Microsoft Academic Search

    T. J. Sobczyk; K. Weinreb

    1988-01-01

    Contents The paper presents a mathematical model of an asynchronous squirrel-cage motor with arbitrarily asymmetrical stator windings. The structure of the mathematical model equations is analysed in detail using the assumption about the symmetry of the rotor cage. A particular arrangement of the mutual inductance matrix of stator windings and rotor cage meshes is shown. As a result of applying

  13. Hall Effect Sensor and Artificial Neural Networks Applied on Diagnosis of Broken Rotor Bars in Large Induction Motors

    Microsoft Academic Search

    C. G. Dias; I. E. Chabu; M. A. Bussab

    2006-01-01

    This paper presents the use of the neural networks techniques in order to help on diagnosis of broken bars in large induction motors in real time. The obtained signal of the Hall effect sensor is applied in an artificial neural network to identify a fault and to estimate the number of broken bars. Simulation results are presented from the model

  14. Induction Motor Fault Diagnosis Using a Hilbert-Park Lissajou's Curve Analysis and Neural Network-Based Decision

    E-print Network

    Paris-Sud XI, Université de

    Induction Motor Fault Diagnosis Using a Hilbert-Park Lissajou's Curve Analysis and Neural Network propose an original fault signature based on the Hilbert-Park Lissajou's curve analysis. The performances used. The proposed fault signature does not require a long temporal recording, and their processing

  15. Derating of Induction Motors Operating with a Combination of Unblanced Voltages and Over-Or under-Voltages

    Microsoft Academic Search

    P. Pillay; P. Hofmann; M. Manyage

    2002-01-01

    This paper examines the proper application of induction machines when supplied by unbalanced voltages in the presence of over-and undervoltages. Differences in the definition of voltage unbalance are also examined. The approach adopted is to use NEMA derating for unbalanced voltages as a basis to include the effects of undervoltages and overvoltages through motor loss calculations.

  16. Hierarchical control of motor units in voluntary contractions.

    PubMed

    De Luca, Carlo J; Contessa, Paola

    2012-01-01

    For the past five decades there has been wide acceptance of a relationship between the firing rate of motor units and the afterhyperpolarization of motoneurons. It has been promulgated that the higher-threshold, larger-soma, motoneurons fire faster than the lower-threshold, smaller-soma, motor units. This relationship was based on studies on anesthetized cats with electrically stimulated motoneurons. We questioned its applicability to motor unit control during voluntary contractions in humans. We found that during linearly force-increasing contractions, firing rates increased as exponential functions. At any time and force level, including at recruitment, the firing rate values were inversely related to the recruitment threshold of the motor unit. The time constants of the exponential functions were directly related to the recruitment threshold. From the Henneman size principle it follows that the characteristics of the firing rates are also related to the size of the soma. The "firing rate spectrum" presents a beautifully simple control scheme in which, at any given time or force, the firing rate value of earlier-recruited motor units is greater than that of later-recruited motor units. This hierarchical control scheme describes a mechanism that provides an effective economy of force generation for the earlier-recruited lower force-twitch motor units, and reduces the fatigue of later-recruited higher force-twitch motor units-both characteristics being well suited for generating and sustaining force during the fight-or-flight response. PMID:21975447

  17. Efficient foot motor control by Neymar’s brain

    PubMed Central

    Naito, Eiichi; Hirose, Satoshi

    2014-01-01

    How very long-term (over many years) motor skill training shapes internal motor representation remains poorly understood. We provide valuable evidence that the football brain of Neymar da Silva Santos Júnior (the Brasilian footballer) recruits very limited neural resources in the motor-cortical foot regions during foot movements. We scanned his brain activity with a 3-tesla functional magnetic resonance imaging (fMRI) while he rotated his right ankle at 1 Hz. We also scanned brain activity when three other age-controlled professional footballers, two top-athlete swimmers and one amateur footballer performed the identical task. A comparison was made between Neymar’s brain activity with that obtained from the others. We found activations in the left medial-wall foot motor regions during the foot movements consistently across all participants. However, the size and intensity of medial-wall activity was smaller in the four professional footballers than in the three other participants, despite no difference in amount of foot movement. Surprisingly, the reduced recruitment of medial-wall foot motor regions became apparent in Neymar. His medial-wall activity was smallest among all participants with absolutely no difference in amount of foot movement. Neymar may efficiently control given foot movements probably by largely conserving motor-cortical neural resources. We discuss this possibility in terms of over-years motor skill training effect, use-dependent plasticity, and efficient motor control. PMID:25136312

  18. End effect analysis of linear induction motor based on the wavelet transform technique

    SciTech Connect

    Mori, Yoshihiko; Torii, Susumu; Ebihara, Daiki

    1999-09-01

    HSST (High Speed Surface Transport) is currently being developed for the railway systems of urban transportation in Japan. It is used in the electromagnetic suspension and short-stator Linear Induction Motor (LIM) for the HSST. The performance of LIM is degraded due to the influence of the end effects. LIM is analyzed using the Fourier series expansion to throw light on this problem. However, to obtain the high-accuracy in this technique, the number of times for calculating is increased. In case of the Wavelet transform technique, as the Wavelet coefficients converge rapidly to zero, this technique has been applied to analyze the end effects of LIM. In this paper, the authors investigated the method for determining of mother wavelet.

  19. Linear motor drive system for continuous-path closed-loop position control of an object

    SciTech Connect

    Barkman, W.E.

    1980-09-09

    A precision numerical controlled servo-positioning system is provided for continuous closed-loop position control of a machine slide or platform driven by a linear-induction motor. The system utilizes filtered velocity feedback to provide system stability required to operate with a system gain of 100 inches/minute/0.001 inch of following error. The filtered velocity feedback signal is derived from the position output signals of a laser interferometer utilized to monitor the movement of the slide. Air -bearing slides mounted to a stable support are utilized to minimize friction and small irregularities in the slideway which would tend to introduce positioning errors. A microprocessor is programmed to read command and feedback information and converts this information into the system following error signal. This error signal is summed with the negative filtered velocity feedback signal at the input of a servo amplifier whose output serves as the drive power signal to the linear motor position control coil.

  20. Motor neurons controlling fluid ingestion in Drosophila

    PubMed Central

    Manzo, Andrea; Silies, Marion; Gohl, Daryl M.; Scott, Kristin

    2012-01-01

    Rhythmic motor behaviors such as feeding are driven by neural networks that can be modulated by external stimuli and internal states. In Drosophila, ingestion is accomplished by a pump that draws fluid into the esophagus. Here we examine how pumping is regulated and characterize motor neurons innervating the pump. Frequency of pumping is not affected by sucrose concentration or hunger but is altered by fluid viscosity. Inactivating motor neurons disrupts pumping and ingestion, whereas activating them elicits arrhythmic pumping. These motor neurons respond to taste stimuli and show prolonged activity to palatable substances. This work describes an important component of the neural circuit for feeding in Drosophila and is a step toward understanding the rhythmic activity producing ingestion. PMID:22474379

  1. A digital PWM control for switched reluctance motor drives

    Microsoft Academic Search

    Baiming Shao; Ali Emadi

    2010-01-01

    Switched reluctance motor (SRM) drives are highly non-linear. Therefore, their control over a wide speed range has unique difficulties. Conventional linear controllers are not ideal for SRMs. In this paper, a novel digital PWM control for SRM drives is presented. By treating the system digitally, the controller switches between two different duty ratios to get the desired speed. The proposed

  2. A note on the nonlinear H? control for synchronous motors

    Microsoft Academic Search

    S. Di Gennaro

    2000-01-01

    Deals with the nonlinear H? control of a permanent magnet synchronous motor subject to parameter variations during its operation. The control aim is to track a desired angular trajectory. First, a controller based on the nominal parameter values is determined, while the parameter variations are considered disturbances acting on the nominal plant. Second, a nonlinear H? controller is designed in

  3. 3. Launch closure, close up of motor and controls, view ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Launch closure, close up of motor and controls, view towards west - Ellsworth Air Force Base, Delta Flight, Launch Facility, On County Road T512, south of Exit 116 off I-90, Interior, Jackson County, SD

  4. Looking East at Motor Control System, Clarity Columns and Blend ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Looking East at Motor Control System, Clarity Columns and Blend Tank Along East Side of Recycle Recovery Building - Hematite Fuel Fabrication Facility, Recycle Recovery Building, 3300 State Road P, Festus, Jefferson County, MO

  5. 76. VIEW OF THE MOTOR CONTROL PANEL IN THE NORTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    76. VIEW OF THE MOTOR CONTROL PANEL IN THE NORTH SIDE OF THE EAST SERVICE BUILDING FOR DOROTHY SIX BLAST FURNACE. (Jet Lowe) - U.S. Steel Duquesne Works, Blast Furnace Plant, Along Monongahela River, Duquesne, Allegheny County, PA

  6. 6. VIEW, LOOKING SOUTH OF OPERATOR DECK, SHOWING MOTOR CONTROLS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW, LOOKING SOUTH OF OPERATOR DECK, SHOWING MOTOR CONTROLS AND LEVERS AND HOIST FOR TRASH RAKE - Cabot Station Electric Generating Plant, Gantry Crane, Montague City Road, Turners Falls vicinity, Montague, Franklin County, MA

  7. Detection of stator winding faults in induction motors using three-phase current monitoring.

    PubMed

    Sharifi, Rasool; Ebrahimi, Mohammad

    2011-01-01

    The objective of this paper is to propose a new method for the detection of inter-turn short circuits in the stator windings of induction motors. In the previous reported methods, the supply voltage unbalance was the major difficulty, and this was solved mostly based on the sequence component impedance or current which are difficult to implement. Some other methods essentially are included in the offline methods. The proposed method is based on the motor current signature analysis and utilizes three phase current spectra to overcome the mentioned problem. Simulation results indicate that under healthy conditions, the rotor slot harmonics have the same magnitude in three phase currents, while under even 1 turn (0.3%) short circuit condition they differ from each other. Although the magnitude of these harmonics depends on the level of unbalanced voltage, they have the same magnitude in three phases in these conditions. Experiments performed under various load, fault, and supply voltage conditions validate the simulation results and demonstrate the effectiveness of the proposed technique. It is shown that the detection of resistive slight short circuits, without sensitivity to supply voltage unbalance is possible. PMID:21074767

  8. Empirical Mode Decomposition and Neural Networks on FPGA for Fault Diagnosis in Induction Motors

    PubMed Central

    Garcia-Perez, Arturo; Osornio-Rios, Roque Alfredo; Romero-Troncoso, Rene de Jesus

    2014-01-01

    Nowadays, many industrial applications require online systems that combine several processing techniques in order to offer solutions to complex problems as the case of detection and classification of multiple faults in induction motors. In this work, a novel digital structure to implement the empirical mode decomposition (EMD) for processing nonstationary and nonlinear signals using the full spline-cubic function is presented; besides, it is combined with an adaptive linear network (ADALINE)-based frequency estimator and a feed forward neural network (FFNN)-based classifier to provide an intelligent methodology for the automatic diagnosis during the startup transient of motor faults such as: one and two broken rotor bars, bearing defects, and unbalance. Moreover, the overall methodology implementation into a field-programmable gate array (FPGA) allows an online and real-time operation, thanks to its parallelism and high-performance capabilities as a system-on-a-chip (SoC) solution. The detection and classification results show the effectiveness of the proposed fused techniques; besides, the high precision and minimum resource usage of the developed digital structures make them a suitable and low-cost solution for this and many other industrial applications. PMID:24678281

  9. Empirical mode decomposition and neural networks on FPGA for fault diagnosis in induction motors.

    PubMed

    Camarena-Martinez, David; Valtierra-Rodriguez, Martin; Garcia-Perez, Arturo; Osornio-Rios, Roque Alfredo; Romero-Troncoso, Rene de Jesus

    2014-01-01

    Nowadays, many industrial applications require online systems that combine several processing techniques in order to offer solutions to complex problems as the case of detection and classification of multiple faults in induction motors. In this work, a novel digital structure to implement the empirical mode decomposition (EMD) for processing nonstationary and nonlinear signals using the full spline-cubic function is presented; besides, it is combined with an adaptive linear network (ADALINE)-based frequency estimator and a feed forward neural network (FFNN)-based classifier to provide an intelligent methodology for the automatic diagnosis during the startup transient of motor faults such as: one and two broken rotor bars, bearing defects, and unbalance. Moreover, the overall methodology implementation into a field-programmable gate array (FPGA) allows an online and real-time operation, thanks to its parallelism and high-performance capabilities as a system-on-a-chip (SoC) solution. The detection and classification results show the effectiveness of the proposed fused techniques; besides, the high precision and minimum resource usage of the developed digital structures make them a suitable and low-cost solution for this and many other industrial applications. PMID:24678281

  10. Control of power to an inductively heated part

    DOEpatents

    Adkins, Douglas R. (1620 Adelita Dr. NE., Albuquerque, NM 87112); Frost, Charles A. (1039 Red Oaks Loop NE., Albuquerque, NM 87122); Kahle, Philip M. (528 Longwood Loop NE., Rio Rancho, NM 87124); Kelley, J. Bruce (13200 Blue Corn Maiden Trail NE., Albuquerque, NM 87112); Stanton, Suzanne L. (2805 Palo Alto NE., Albuquerque, NM 87112)

    1997-01-01

    A process for induction hardening a part to a desired depth with an AC signal applied to the part from a closely coupled induction coil includes measuring the voltage of the AC signal at the coil and the current passing through the coil; and controlling the depth of hardening of the part from the measured voltage and current. The control system determines parameters of the part that are functions of applied voltage and current to the induction coil, and uses a neural network to control the application of the AC signal based on the detected functions for each part.

  11. Calculation and simulation of power parameters for inverter-fed induction motor

    Microsoft Academic Search

    Zhang Ruihua; Yan Luguang; Li Yaohua Wang Ke

    2007-01-01

    Measurements of voltage, current, and power under non-sinusoidal conditions are essential for determining the efficiency of a drive system and performing separation of losses between an adjustable speed drive and an electric motor. In variable-frequency and variable-speed control system, the input waveform is PWM, conventional apparatus can not be used to measure power parameters. The algorithm of calculation and simulation

  12. Position tracking control of a synchronous reluctance motor

    SciTech Connect

    Geoghan, A.J.; Carroll, J.J. [Clarkson Univ., Potsdam, NY (United States). Dept. of Electrical and Computer Engineering

    1995-12-31

    The synchronous reluctance (SynR) motor is an attractive candidate for high-performance servo drive systems for various reasons. An integrator back-stepping technique is used to design a trajectory tracking control strategy for SynR motors driving inertial loads. A d-q model which describes the dynamical behavior of the SynR motor is introduced; based on this model, a voltage level controller is proposed which theoretically provides globally uniform asymptotically stable (GUAS) motor trajectory tracking given exact model knowledge and full state feedback (i.e., rotor position, velocity, and the per phase winding currents). The performance of the proposed voltage level controller is verified using computer simulation.

  13. Self-controlled practice benefits motor learning in older adults.

    PubMed

    Lessa, Helena Thofehrn; Chiviacowsky, Suzete

    2015-04-01

    Providing learners with the chance to choose over certain aspects of practice has been consistently shown to facilitate the acquisition of motor skills in several populations. However, studies investigating the effects of providing autonomy support during the learning process of older adults remain scarce. The objective of the present study was to investigate the effects of self-controlled amount of practice on the learning of a sequential motor task in older adults. Participants in the self-control group were able to choose when to stop practicing a speed cup stacking task, while the number of practice trials for a yoked group was pre-determined, mirroring the self-control group. The opportunity to choose when stop practicing facilitated motor performance and learning compared to the yoked condition. The findings suggest that letting older adult learners choose the amount of practice, supporting their autonomy needs, has a positive influence on motor learning. PMID:25687663

  14. CS281: Computer Systems PreLab 06: Ohm's Law and Servo Motor Control

    E-print Network

    Kretchmar, R. Matthew

    this basic circuit knowledge to control the position of a servo motor. Ohm's Law Ohm's law, the most airplane might have four servo motors: one to control the speed of the motor (throttle), one to controlCS281: Computer Systems PreLab 06: Ohm's Law and Servo Motor Control The purpose of this prelab

  15. Wavelet neural network control for linear ultrasonic motor drive via adaptive sliding-mode technique.

    PubMed

    Lin, Faa-Jeng; Wai, Rong-Jong; Chen, Mu-Ping

    2003-06-01

    A wavelet neural network (WNN) control system is proposed to control the moving table of a linear ultrasonic motor (LUSM) drive system to track periodic reference trajectories in this study. The design of the WNN control system is based on an adaptive sliding-mode control technique. The structure and operating principle of the LUSM are introduced, and the driving circuit of the LUSM, which is a voltage source inverter using two-inductance two capacitance (LLCC) resonant technique, is introduced. Because the dynamic characteristics and motor parameters of the LUSM are nonlinear and time varying, a WNN control system is designed based on adaptive sliding-mode control technique to achieve precision position control. In the WNN control system, a WNN is used to learn the ideal equivalent control law, and a robust controller is designed to meet the sliding condition. Moreover, the adaptive learning algorithms of the WNN and the bound estimation algorithm of the robust controller are derived from the sense of Lyapunov stability analysis. The effectiveness of the proposed WNN control system is verified by some experimental results in the presence of uncertainties. PMID:12839181

  16. VSS robust control techniques for AC motor drives

    Microsoft Academic Search

    C. Rossi; A. Tonielli; R. Zanasi

    1991-01-01

    Robust control of AC asynchronous motor drives in the presence of strong parameter uncertainties is considered. Due to the different bandwidths associated with the controlled variables, a cascade structure is used. A multivariable sliding mode closed-loop controller with a hysteresis region is used to transform the voltage source inverter into a current source (CS) one. On the assumption of a

  17. A fault tolerant control system for hexagram inverter motor drive

    Microsoft Academic Search

    Liang Zhou; Keyue Smedley

    2010-01-01

    In this paper, a fault tolerant control method for hexagram inverter motor drive is proposed. Due to its unique topology, the hexagram inverter is able to tolerate certain degree of switch failure with a proper control method. The proposed method consists of fault detection, fault isolation and post fault control. A simple fault isolation method is to use fuses in

  18. A controller for chaotic Synchronous Reluctance Motor drives system

    Microsoft Academic Search

    Feiqiu TANG Yaonan TONG; Yaonan Tong; Chunlai Li

    2011-01-01

    When system parameters falling into a certain area, the Synchronous Reluctance Motor drives (SynRM) will experience chaotic behavior, which threatens the secure and stable operation of drive system. To control the undesirable chaos or limit cycles in SynRM, a novel controller is proposed based on tridiagonal structure matrix stability theory. The proposed controller have some advantages: it is simple and

  19. Higher order sliding mode control of a stepper motor

    Microsoft Academic Search

    M. Defoort; F. Nollet; T. Floquet; W. Perruquetti

    2006-01-01

    This paper deals with the design and the experimental implementation of a robust higher order sliding mode controller for the stepper motor. The control objective is to track in finite time a given position reference trajectory. The developed algorithm provides a control based on geometric homogeneity with an additional integral sliding mode term which completely dismisses the influence of uncertainties

  20. A high speed velocity control algorithm of multiple stepper motors

    Microsoft Academic Search

    D. O. Carrica; S. A. González; M. Benedetti

    2004-01-01

    When the applications involve the simultaneous control of multiple stepper motors conventional on-line control algorithms fail to produce a high speed step rate. An analysis of the problem is presented and an algorithm [Proc IMechE Part I: J Systems and Control Engineering 217 (2003) 359] is applied which does not have the speed restriction as the conventional ones and does