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1

Motion control with induction motors  

Microsoft Academic Search

Induction motors (IM) provide a very wide speed range, mechanically robust and relatively low cost motion control option. An up-to-date summary of the status of induction motor motion control technology is the subject of this paper. The topics which this paper includes are as follows: basic motion control system requirements; field orientation instantaneous torque control principles for induction motors (FO-IM);

ROBERT D. LORENZ; THOMAS A. LIPO; DONALD W. NOVOTNY

1994-01-01

2

Adaptive decoupling control of induction motor drives  

Microsoft Academic Search

A novel control approach for a robust induction motor drive system with a voltage source inverter has been developed. In the scheme, the induction motor and its corresponding inverter gating signal are controlled using the decoupling control theory. In addition, an adaptive optimal speed regulator employing the model reference adaptive control (MRAC) is incorporated into the drive system to compensate

C. C. Chan; W. S. Leung; C. W. Ng

1990-01-01

3

On speed control of induction motors  

Microsoft Academic Search

In a recent paper [(Espinosa-Pérez and Ortega, 1994). State observers are unnecessary for induction motor control. Syst. & Control Lett., 23, 315–323] Espinosa and Ortega presented an output feedback globally stable speed tracking controller for induction motors. The performance of the scheme is limited by the fact that the convergence rate of the speed tracking errors is determined by the

Romeo Ortega; Per Johan Nicklasson; Gerardo Espinosa-Pérez

1996-01-01

4

Sensorless control of induction motor drives  

Microsoft Academic Search

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 the information on the rotor speed is extracted from measured stator voltages and currents at the motor terminals. Vector-controlled drives require estimating the magnitude and spatial orientation of the fundamental magnetic flux waves in the

JOACHIM HOLTZ

2002-01-01

5

Synchronous Control of a Static AC Induction Motor Drive  

Microsoft Academic Search

Conventional methods of controlling an induction motor utilize regulation of stator current and motor slip frequency in order to maintain system stability. This control strategy requires a shaft speed feedback and fast-response current regulation. An alternative method of controlling an induction motor is presented which achieves the necessary system stabilization by controlling only the motor frequency. The control inherently regulates

Allan B. Plunkett; John D. D'Atre; Thomas A. Lipo

1979-01-01

6

Dynamic neural controllers for induction motor.  

PubMed

The paper reports application of recently developed adaptive control techniques based on neural networks to the induction motor control. This case study represents one of the more difficult control problems due to the complex, nonlinear, and time-varying dynamics of the motor and unavailability of full-state measurements. A partial solution is first presented based on a single input-single output (SISO) algorithm employing static multilayer perceptron (MLP) networks. A novel technique is subsequently described which is based on a recurrent neural network employed as a dynamical model of the plant. Recent stability results for this algorithm are reported. The technique is applied to multiinput-multioutput (MIMO) control of the motor. A simulation study of both methods is presented. It is argued that appropriately structured recurrent neural networks can provide conveniently parameterized dynamic models for many nonlinear systems for use in adaptive control. PMID:18252531

Brdy?, M A; Kulawski, G J

1999-01-01

7

A passivity-based method for induction motor control  

Microsoft Academic Search

The control of an induction motor is a difficult problem, since the dynamics of the induction motor are nonlinear, the rotor electrical state variables (i.e., rotor fluxes or currents) are usually unavailable for measurement, and the motor parameters can vary significantly from their nominal values. The main purpose of this paper is to develop a control algorithm that forces the

Levent U. Gokdere; Marwan A. Simaan

1997-01-01

8

Adaptive Backstepping Controller Design for Linear Induction Motor Position Control  

NASA Astrophysics Data System (ADS)

In this paper, the mover position control of a linear induction motor using an adaptive backstepping control design based on filed orientation is proposed. Firstly, the indirect field oriented control of Linear Induction Motor (LIM) is derived. Then, a novel adaptive backstepping control design technique is investigated to achieve a position tracking objective under parameter uncertainties and disturbance of load torque. The effectiveness of the proposed control scheme is verified by numerical simulation. The numerical validation results of the proposed scheme have presented good performances compared to the conventional backstepping controller.

Bouserhane, I. K.; Boucheta, A.; Hazzab, A.; Mazari, B.; Sicard, P.

2009-03-01

9

High-performance direct torque control of an induction motor  

Microsoft Academic Search

A novel direct torque control method for an induction motor is presented which is quite different from field-oriented control. Improving the torque response of a large-capacity induction motor using two sets of three-phase inverters and an open-data induction motor is of special concern. Instantaneous voltage vectors applied by an inverter have redundancy characteristics which provide some flexibility for selecting the

I. Takahashi; Y. Ohmori

1989-01-01

10

Direct Torque Control for Induction Motor Using Fuzzy Logic  

Microsoft Academic Search

In this paper we propose an approach to improve the direct torque control (DTC) of an induction motor (IM). The proposed DTC is based on fuzzy logic technique switching table, is described compared with conventional direct torque control (DTC). To test the fuzzy control strategy a simulation platform using MATLAB\\/SIMULINK was built which includes induction motor d-q model, inverter model,

R. Toufouti; S. Meziane; H. Benalla

2006-01-01

11

FUZZY LOGIC CONTROL OF AC INDUCTION MOTORS  

EPA Science Inventory

The paper discusses the fuzzy logic control (FLC) of electric motors, being investigated under the sponsorship of the U.S. EPA to reduce energy consumption when motors are operated at less than rated speeds and loads. lectric motors use 60% of the electrical energy generated in t...

12

Control System for an Induction Motor with Energy Recovery.  

National Technical Information Service (NTIS)

A control circuit for an induction motor powered system is described 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 machi...

F. J. Nola

1982-01-01

13

Loss Minimization Control of Induction Motor Using GA-PSO  

Microsoft Academic Search

\\u000a This paper deals with the GA-PSO (Genetic Algorithm-Particle Swarm Optimization) based vector control for loss minimization\\u000a operation of induction motor. It is estimated that more than around 50% of the world electric energy generated is consumed\\u000a by electric machines such as induction motor, DC motor. So, improving efficiency in electric drives is important and control\\u000a strategy for minimum energy loss

Dong Hwa Kim; Jin Ill Park

2005-01-01

14

Direct thrust controlled linear induction motor including end effect  

Microsoft Academic Search

As a special feature, the linear induction motor (LIM) has an end effect phenomena causing weakening in airgap flux also in thrust. In this paper, direct thrust control of linear induction motors is improved by considering the end effect in flux and thrust estimator part based on the mathematical model of LIM. To show the effectiveness of the improved system,

Berrin Susluoglu; Vedat M. Karsli

2008-01-01

15

Decoupling control of induction motor drives  

Microsoft Academic Search

The decoupling control of induction machines is investigated. Three different schemes for decoupling-control methods based on stator flux, airgap flux, and rotor flux field regulation are developed. The control dynamics of each scheme are outlined and studied. Simulation results are presented to verify that these schemes provide decoupling control with excellent dynamic behavior. The transient and steady-state relationships between slip

EDWARD Y. Y. HO; P. C. Sen

1988-01-01

16

Motor power control circuit for ac induction motors  

NASA Astrophysics Data System (ADS)

A motor power control of the type which functions by controlling the power factor wherein one of the parameters of power factor current on time is determined by the on time of a triac through which current is supplied to the motor. By means of a positive feedback circuit, a wider range of control is effected.

Nola, F. J.

1983-03-01

17

Control system for an induction motor with energy recovery  

SciTech Connect

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.

Nola, F.J.

1983-11-22

18

Control system for an induction motor with energy recovery  

NASA Astrophysics Data System (ADS)

A control circuit for an induction motor powered system is disclosed in which 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.

Nola, F. J.

1983-11-01

19

Vector control of induction motor without shaft encoder  

Microsoft Academic Search

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

T. Ohtani; N. Takada; K. Tanaka

1989-01-01

20

Fuzzy-logic control of AC induction motors  

SciTech Connect

The paper discusses the fuzzy logic control (FLC) of electric motors, being investigated under the sponsorship of the U.S. EPA to reduce energy consumption when motors are operated at less than rated speeds and loads. Electric motors use 60% of the electrical energy generated in the U.S. An improvement of 1% in operating efficiency of all electric motors could result in savings of 17 billion kWh per year in the U.S. New techniques are required to extract maximum performance from modern motors. One possibility, FLC, has recently demonstrated success in solving control problems of nonlinear, multivariable systems such as ac induction motors and adjustable motor-speed drives. Simulated results of a microprocessor-based fuzzy logic motor controller (FLMC) are described. The investigation includes a motor stator voltage control scheme to minimize motor input power at specified speed/torque conditions; simulation of ac motor performance; and development of a FLMC for optimized motor efficiency. Simulated FLMC results compare favorably with other motor control approaches. Potential energy savings are quantitated based on the preliminary predictions of FLMC performance.

Cleland, J.; Turner, W.; Wang, P.; Espy, T.; Chappell, P.J.

1992-01-01

21

Application of Sliding Modes to Induction Motor Control  

Microsoft Academic Search

The results of the research concerned with the problem of induction motor control system synthesis using variable structure systems theory is presented. The procedure of control systems synthesis for the control of position speed and torque is given, as well as basic experimental results and problems related to realization of the proposed control algorithms.

Asif Sabanovic; Dmitrij B. Izosimov

1981-01-01

22

Digital Phase-Locked Loop for Induction Motor Speed Control  

Microsoft Academic Search

The study of the speed control of induction motor drive using digital phase-locked loop is discussed. The block diagram and the control circuitry have been outlined. A mathematical model has been developed to predict the system performance. Different types of filters have been considered as part of the feedback control system, and their effects on the overall system behavior have

R. Moffat; Paresh C. Sen; R. Younker; Mohamed M. Bayoumi

1979-01-01

23

Discontinuous SVPWM Techniques for Double Star Induction Motor Drive Control  

Microsoft Academic Search

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

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

2006-01-01

24

DIRECT TORQUE CONTROL FOR INDUCTION MOTOR USING INTELLIGENT TECHNIQUES  

Microsoft Academic Search

In this paper, we propose two approach intelligent techniques of improvement of Direct Torque Control (DTC) of Induction motor such as fuzzy logic (FL) and artificial neural network (ANN), applied in switching select voltage vector .The comparison with conventional direct torque control (DTC), show that the use of the DTC_FL and DTC_ANN, reduced the torque, stator flux, and current ripples.

R. Toufouti; S. Meziane; H. Benalla

25

Adaptive input-output linearizing control of induction motors  

Microsoft Academic Search

A nonlinear adaptive state feedback input-output linearizing control is designed for a fifth-order model of an induction motor which includes both electrical and mechanical dynamics under the assumptions of linear magnetic circuits. The control algorithm contains a nonlinear identification scheme which asymptotically tracks the true values of the load torque and rotor resistance which are assumed to be constant but

Riccardo Marino; Sergei Peresada; Paolo Valigi

1993-01-01

26

Modeling and Design of Controlled Current Induction Motor Drive Systems  

Microsoft Academic Search

A dynamic model for current-controlled induction motor drives is developed, and a transfer function approach to the transient response investigation is formulated by means of d-q variables in the synchronously rotating reference frame. A sample control strategy is discussed, and transfer functions for various combinations of input and output variables are presented. It is shown that both dynamic and static

Edward P. Cornell; Thomas A. Lipo

1977-01-01

27

A modified direct torque control for induction motor sensorless drive  

Microsoft Academic Search

Direct torque control (DTC) is known to produce quick and robust response in AC drives. However, during steady state, notable torque, flux and current pulsations occur. They are reflected in speed estimation, speed response, and also in increased acoustical noise. This paper introduces a new direct torque and flux control based on space-vector modulation (DTC-SVM) for induction motor sensorless drives.

Cristian Lascu; Ion Boldea; Frede Blaabjerg

2000-01-01

28

Forward and Reverse Control System for Induction Motors.  

National Technical Information Service (NTIS)

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 a...

J. T. Wright

1987-01-01

29

Direct torque control of induction motor soft starting  

Microsoft Academic Search

This paper presents a simple technique based on stator flux estimation to control the electromagnetic torque of induction motors during soft starting. The inherent problems related to pure integration of the back electromagnetic force to estimate the stator flux are minimized using the low pass filter approach. The experimental results are dealt with and compared to the usual current control

José de Oliveira; Ademir Nied; Rogério P. Dias; L. C. de Souza Marques

2009-01-01

30

A novel approach to induction motor controller design and implementation  

Microsoft Academic Search

The paper presents a new approach to the modelling, simulation, digital controller design and implementation of a complete induction motor electric drive system. The design approach is to use a very high speed integrated circuit hardware description language (VHDL) as a unique EDA environment for system modelling, evaluation and controller design. Simulation and experimental results are presented, proving the validity

A. Aounis; M. McCormick; M. Cirstea

2002-01-01

31

Intelligent Decoupled Control for Linear Induction Motor Drive  

Microsoft Academic Search

This study focuses on the development of a robust Petri-fuzzy-neural-network (PFNN) control strategy to a linear induction motor (LIM) drive for periodic motion. Based on the concept of the nonlinear state feedback theory, a feedback linearization control (FLC) system is first adopted in order to decouple the thrust force and the flux amplitude of the LIM. However, particular system information

Rong-jong Wai; Jeng-dao Lee; Chia-chin Chu

2006-01-01

32

Self-adjusting fuzzy controller application for linear induction motor control system  

Microsoft Academic Search

The mathematical model of linear induction motor (LIM) based on slip frequency type vector control system is established. A self-adjusting fuzzy controller (SAFC) is designed as magnetic thrust adjuster of the motor. The speed of the motor is adjusted by control magnetic thrust of the motor. The scheme of the slip frequency type vector control system of the LIM is

Wang-Yuhua; Zhu-xi Lin; Dang-Zhiqian; Sun-Ying

2008-01-01

33

Sensorless position control of induction motors-an emerging technology  

Microsoft Academic Search

Concepts for the sensorless position control of induction motor drives rely on anisotropic properties of the machine rotor. Such anisotropies can be incorporated as periodic variations of magnetic saliencies in various ways. The built-in spatial anisotropy is detected by injecting a high-frequency flux wave into the stator. The resulting stator current harmonics contain frequency components that depend on the rotor

Joachim Holtz

1998-01-01

34

Transient Analysis of Three-Phase SCR Controlled Induction Motors  

Microsoft Academic Search

The problem of simulating the transient performance of thyristor controlled three-phase induction motors is discussed. A method of solution by digital simulation using phase variables has been developed and is presented. The method enables transient current, speed, and electromagnetic torque patterns to be predicted for run-up conditions and conditions of operating mode transition. Application of the method is illustrated and

Gautam Nath; Gunnar J. Berg

1981-01-01

35

Robust adaptive control of induction motors without flux measurements  

Microsoft Academic Search

Presents robust adaptive control technique for induction motors. The method is robust to parameter variations and the stability analysis is much simpler than other approaches such as Marine's adaptive input-output linearization method. Another main advantage of the authors' method is that they only require a reduced-order system to be linearly parametrizable (LP); the rest of the system dynamics can be

C. M. Kwan; F. L. Lewis; K. S. Yeung

1995-01-01

36

Adaptive speed control for induction motor drives using neural networks  

Microsoft Academic Search

In this paper, the adaptive speed control of induction motor drives using neural networks is presented. To obtain good tracking and regulating control characteristics, a digital two-degree-of-freedom (2DOF) controller is adopted and a design procedure is developed for systematically finding its parameters according to prescribed specifications. The parameters of the controller corresponding to various drive parameter sets are found off-line

Y. S. Kung; C. M. Liaw; M. S. Ouyang

1995-01-01

37

Direct self control of induction motor based on neural network  

Microsoft Academic Search

This paper presents an artificial-neural-network-based direct-self-control (ANN-DSC) scheme for an input inverter-fed three-phase induction motor. In order to cope with the complex calculations required in direct self control (DSC), the proposed artificial-neural-network (ANN) system employs the individual training strategy with fixed-weight and supervised models. A computer simulation program is developed using Matlab\\/Simulink together with the Neural Network Toolbox. The simulated

K. L. Shi; T. F. Chan; Y. K. Wong; S. L. Ho

2001-01-01

38

Digital implementation of neural network inverse control for induction motor based on DSP  

Microsoft Academic Search

The induction motor is multi-variable, nonlinear and strong-coupled system. Due to parameters' variation during operation of induction motor, the decoupling and linearization implemented by field oriented control and analytical inverse control is destroyed. For that, a novel linearization and decoupling method named as artificial neural network (ANN) inverse for induction motor control is proposed. With the combination of neural network

Yongxian Song; Juanli Ma; Hanxia Zhang; Naibao He

2010-01-01

39

Indirect matrix converter based on investigations of field-oriented control for induction motor  

Microsoft Academic Search

The rectifier and inverter are used in vector control of induction motor. The most shortcomings are that exist a big capacitor and energy pass only from power sources to load. This paper details a novel matrix converter-indirect matrix converter. It is used in vector controlling research of induction motor and displaced for conventional inverter to supply power for induction motor.

Qu Xiaodong; Xu Yanchun; Wang Yuye

2009-01-01

40

ANFIS based soft-starting and speed control of AC voltage controller fed induction motor  

Microsoft Academic Search

An intelligent AC voltage controller is proposed for the control of induction motor. It controls the motor speed by adjusting the firing angles of the thyristors. Adaptive network fuzzy inference system (ANFIS) based controller was designed for open-loop sensor less control. The results obtained were satisfactory and promising. In addition to simplicity, stability, and high accuracy such controller gives soft

Mohammad Ayyub

2006-01-01

41

Direct torque control, induction motor vector control without an encoder  

Microsoft Academic Search

The basic evolution of direct torque control from other drive types is explained. Qualitative comparisons with other drives are included. The basic concepts behind direct torque control are clarified. An explanation of direct self control and the field-orientation concepts implemented in the adaptive motor model block is presented. The reliance of the control method on fast processing techniques is stressed.

James N. Nash

1997-01-01

42

Design of current controllers in sensorless induction motor applications - speed control versus torque control  

Microsoft Academic Search

The paper discusses the design of synchronous reference frame current controllers for a sensorless induction motor (IM) drive that operates in speed regulation mode or torque control mode. In most IM implementations, PI controllers alone are used for current regulation because of convenience. The reference values fed in the current controllers are either preselected or are synthesized by flux, speed

Mihai Comanescu; Todd Batzel

2007-01-01

43

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

Microsoft Academic Search

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

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

1990-01-01

44

Speed synchronization of multiple induction motors with adjacent cross coupling control  

Microsoft Academic Search

In this paper, a new control approach for real time speed synchronization of multiple induction motors during speed acceleration and load changes is developed. The control strategy is to stabilize speed tracking of each motor while synchronizing its motion with other motors' motions so that differential speed errors amongst multiple motors converge to zero. An adjacent cross coupling control architecture

Dezong Zhao; Chunwen Li; Jun Ren

2009-01-01

45

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

Microsoft Academic Search

This paper extensively introduces two kinds of control schemes that can be applied to the operation of a five-phase induction motor-vector control and direct torque control, as well as their fully digital implementations. Vector control of the five-phase induction motor generates the fundamental and third harmonic currents. In conjunction with the designed five-phase induction motor geometry, this current profile induces

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

2001-01-01

46

Speed control of induction motor using fuzzy algorithm with hierarchical structure  

Microsoft Academic Search

This paper describes a fuzzy logic controller for the speed control of induction motors. For changes of load inertia moment and load torque, the performance of speed controllers using a fuzzy algorithms with hierarchical structure and using conventional PI controllers is investigated. These controllers are applied to a laboratory model drive system with a 2.2 kW induction motor. Simulation and

Ho-Seok Lee; Taeck-Kie Lee; Soon-Bong Cho; Dong-Seok Hyun

1993-01-01

47

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

Microsoft Academic Search

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

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

2002-01-01

48

Neural and Fuzzy Adaptive Control of Induction Motor Drives  

SciTech Connect

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.

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

49

Optimal Efficiency Drive of a Current Source Inverter Fed Induction Motor by Flux Control  

Microsoft Academic Search

When an induction motor is driven under light loads, the efficiency can be substantially improved by reducing the air-gap flux of the motor. The air-gap flux can be indirectly controlled by adjusting the stator current and slip frequency in the case of a current source inverter induction motor drive system. The relationship between the stator current and the slip frequency

Heung G. Kim; Seung K. Sul; Min H. Park

1984-01-01

50

An Approach to Flux Control of Induction Motors Operated with Variable-Frequency Power Supply  

Microsoft Academic Search

A new speed control system for induction motors has been developed which is capable of controlling with quick field weakening and superior response and stability. This method is to control the stator current as a vector quantity on the basis of slip frequency control. More specifically, it is designed to calculate the commanded stator current of the induction motor by

Akira Nabae; Kenichi Otsuka; Hiroshi Uchino; Ryoichi Kurosawa

1980-01-01

51

Study on sliding mode speed control with fuzzy approach for doubly-fed induction motor  

Microsoft Academic Search

A nonlinear speed controller for doubly-fed induction motor (DFIM) based on backstepping control and fuzzy sliding mode approach was designed to counter the effects of the coupling between the electromagnetic torque and the flux. The proposed strategy using fuzzy switching control could enhance the robustness adaptively compare with conventional sliding mode control. A simulation model for the doubly-fed induction motor

Li Yuan; He Feng-you; Ye Zong-bin

2009-01-01

52

New direct torque control scheme of induction motor for electric vehicles  

Microsoft Academic Search

In this paper, new scheme of direct torque control of induction motor for electric vehicles is proposed and the results of an investigation into suitable torque control schemes are also presented. The electric vehicle drive consists of rewound induction motors and a three-level IGBT inverter. The schemes investigated are field-oriented control, direct torque control (DTC), and DTC using space vector

M. Vasudevan; R. Arumugamt

2004-01-01

53

Forward and reverse control system for induction motors  

SciTech Connect

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.

Wright, J.T.

1987-09-15

54

A Fuzzy based PI speed controller for indirect vector controlled induction motor drive  

Microsoft Academic Search

This paper presents the speed control scheme of indirect vector controlled induction motor (IM) drive. Voltage source inverter type space vector pulse width modulation (SVPWM) is used for PWM controlling scheme. An intelligent based on Fuzzy PI controller is developed for controlling the torque component Iq current of an IM. The complete vector control scheme of the IM drive incorporating

R. Arulmozhiyal; K. Baskaran; R. Manikandan

2011-01-01

55

Design and implementation of PLC-based monitoring control system for induction motor  

Microsoft Academic Search

The implementation of a monitoring and control system for the induction motor based on programmable logic controller (PLC) technology is described. Also, the implementation of the hardware and software for speed control and protection with the results obtained from tests on induction motor performance is provided. The PLC correlates the operational parameters to the speed requested by the user and

Maria G. Ioannides

2004-01-01

56

Control of induction motors for both high dynamic performance and high power efficiency  

Microsoft Academic Search

The authors attempt to control induction motors with maximum power efficiency as well as high dynamic performance by means of decoupling of motor speed (or motor torque) and rotor flux. For maximum power efficiency, the squared rotor flux is adjusted according to a minimum power search algorithm until the measured power input reaches the minimum. Since the motor speed is

Gyu-Sik Kim; In-Joong Ha; Myoung-Sam Ko

1992-01-01

57

Robust control of induction motor using fuzzy sliding adaptive controller with sliding mode torque observer  

Microsoft Academic Search

In this paper, a robust speed controller for an induction motor is proposed. The speed controller consists of a fuzzy sliding adaptive controller (FSAC) and a sliding mode torque observer (SMTO). The FSAC removes the problem of oscillations caused by discontinuous inputs of the sliding mode controller. The controller also provides robust characteristics against parameter and sampling time variations. Although,

Byung-Do Yoon; Yoon-Ho Kim; Chan-Ki Kim; Choon-Sam Kim

1995-01-01

58

Performance of vector controlled induction motor drive with reactive power based MRAS rotor resistance estimator  

Microsoft Academic Search

In this paper, a detailed study of the performance of Vector Controlled Induction Motor drive with Model Reference Adaptive System (MRAS) based Rotor Resistance Estimator using Reactive Power is presented. The rotor resistance changes significantly during operation due to temperature rise. This variation has a major influence on the field oriented control performance of an induction motor drive due to

M. Nandhini Gayathri; S. Himavathi; R. Sankaran

2011-01-01

59

A strategy for improving reliability of field-oriented controlled induction motor drives  

Microsoft Academic Search

Although design of induction motor drives employing field-oriented control has reached a relatively mature state, relatively little effort has been expended on improving the reliability of these drives. A new, improved induction motor drive topology and control strategy are proposed that allow for continuous, disturbance-free operation of the drive even with complete loss of one leg of the inverter or

Tian-Hua Liu; Jen-Ren Fu; Thomas A. Lipo

1993-01-01

60

Nonlinear Optimal Controller of Three-Phase Induction Motor Using Quasilinearization  

Microsoft Academic Search

This paper presents the solution of the nonlinear optimal control problem of three-phase induction motor (IM). A third order nonlinear model described in arbitrary rotating frame of induction motor is used in this paper along with a quadratic performance index. The problem is solved using the quasilineraization approach which converts the nonlinear optimal control problem into sequence of linear quadratic

Jasem M. Kh; Hussein M. Jaddu

61

Loss minimization in scalar-controlled induction motor drives with search controllers  

SciTech Connect

Loss minimization in scalar-controlled induction motor drives (IMD) with search controllers (SC) is investigated. The problems arising when the input power is used as the controlled variable are described. It is proved that better results are achieved if the stator current is used as the controlled variable.

Kioskeridis, I.; Margaris, N. [Aristotle Univ. of Thessaloniki (Greece). Dept. of Electrical and Computer Engineering

1996-03-01

62

Single-phase induction motor indirect field oriented control under nominal load  

Microsoft Academic Search

This paper discusses the performance of a single-phase induction motor drive under nominal load in a closed-loop vector-controlled system. The control strategy to be applied is known as indirect field oriented control. Single-phase induction motor when operating as two-phase motor has its dynamic performance increased. With the use of a standard three-phase voltage-source inverter, space vector pulse width modulation can

Ademir Nied; J. de Oliveira; F. L. de Sa; R. de F Campos; L. H. R. de C Stival

2009-01-01

63

Optimale efficiency control of linear induction motor for linear metro  

Microsoft Academic Search

In this paper, a new approach is proposed that minimizes the total copper and iron losses in variable speed and\\/or thrust force of linear induction motor (LIM) drive. This method is based on a LIM model that considers the end effect and attraction force. For a given speed and load this model allows the establishment of equations to quantify copper

Jianqiang Liu; Fei Lin; Hu Sun; Trillion Q. Zheng

2008-01-01

64

Test Evaluation of a Reduced-Voltage Induction Motor Controller.  

SciTech Connect

This project was designed to test the performance of a motor controller called the ``Electro Guard`` that was distributed by Conservation Products Manufacturing. This motor controller was marketed as a new generation motor controller that saves electric energy by reducing voltage to match motor load and to improve power factor. This project included laboratory testing and had the option of field demonstrations to evaluate energy savings and cost effectiveness, equipment stability and reliability, appropriate applications, level of induced harmonic currents, maintenance soft start benefits, and potential regional electrical energy savings.

Portland General Energy Systems.

1994-07-01

65

Robust speed identification for speed-sensorless vector control of induction motors  

Microsoft Academic Search

This paper describes a new approach to estimating induction motor speed from measured terminal voltages and currents for speed-sensorless vector control. The proposed approach is based on observing the instantaneous reactive power of the motor. The estimated speed is used as feedback in an indirect vector control system. The described technique is very simple and robust to variations of motor

Fang-Zheng Peng; Tadashi Fukao

1994-01-01

66

EFFICIENCY OPTIMIZATION CONTROL OF AC INDUCTION MOTORS: INITIAL LABORATORY RESULTS  

EPA Science Inventory

The report discusses the development of a fuzzy logic, energy-optimizing controller to improve the efficiency of motor/drive combinations that operate at varying loads and speeds. his energy optimizer is complemented by a sensorless speed controller that maintains motor shaft rev...

67

EFFICIENCY OPTIMIZATIN CONTROL OF AC INDUCTION MOTORS: INITIAL LABORATORY RESULTS  

EPA Science Inventory

The report discusses the development of a fuzzy logic, energy-optimizing controller to improve the efficiency of motor/drive combinations that operate at varying loads and speeds. This energy optimizer is complemented by a sensorless speed controller that maintains motor shaft re...

68

Rotor resistance identification using artificial neural networks for an indirect vector controlled induction motor drive  

Microsoft Academic Search

This paper presents a new method of estimation for the rotor resistance of the induction motor in the indirect vector controlled drive. The back propagation neural network technique is used for the real time adaptive estimation. The error between the desired state variable of an induction motor and the actual state variable of a neural model is back propagated to

B. Karanayil; M. F. Rahman; C. Grantham

2001-01-01

69

An effective method for rotor resistance identification for high-performance induction motor vector control  

Microsoft Academic Search

An effective method for rotor resistance identification is presented for the purpose of improving the performance of vector control of induction motor drives. The method is mathematically derived from proper selection of coordinate axes and utilization of the steady-state model of the induction motor. The major advantages of the method lie in its simplicity and accuracy. A series of computer

C. C. Chan; HUAQIAN WANG

1990-01-01

70

FUZZY-LOGIC-BASED CONTROLLERS FOR EFFICIENCY OPTIMIZATION OF INVERTER-FED INDUCTION MOTOR DRIVES  

EPA Science Inventory

This paper describes a fuzzy-logic-based energy optimizing controller to improve the efficiency of induction motor/drives operating at various load (torque) and speed conditions. Improvement of induction motor efficiency is important not only from the considerations of energy sav...

71

New Improved PSO Based Parameter Estimation for Energy Efficient Control of Induction Motor Drive  

Microsoft Academic Search

Induction motor is most frequently used electric machine in various applications due to its well known advantages. The method of vector control help achieve high performance from an induction motor but performance deteriorates due to variation of its parameters. In this paper improved version of Particle Swarm Optimization i.e. Systematic Mutation based Particle Swarm Optimization, SMPSO is used for parameter

J. G. Yadav; S. P. Srivastava; Raj Kumar

2012-01-01

72

On Hopf bifurcations in indirect field oriented control of induction motors: designing a robust PI controller  

Microsoft Academic Search

In this paper we analyze the occurrence of Hopf bifurcations in indirect field-oriented control of induction motors and derive guidelines for setting the PI speed loop controller in order to keep the bifurcations far enough from the operating conditions in the parameter space

A. S. Bazanella; R. Reginatto; R. Valiati

1999-01-01

73

A New Control Strategy of Direct Torque Fuzzy Control of a PWM Inverter Fed Induction Motor Drive  

Microsoft Academic Search

This paper presents an original direct torque fuzzy control (DTFC) of a voltage source PWM inverter fed induction motor drive. First a direct torque fuzzy control (DNFC) of a voltage source PWM inverter fed induction motor drive is presented and its performances are compared to those of a classical DTC control. Then a variable gain PI speed controller is introduced

A. Miloudi; E. A. Alradadi; A. Draou

2006-01-01

74

Efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill  

Microsoft Academic Search

This paper presents an efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill in South Africa. Two scenarios were evaluated: 1) where the induction motor was controlled at a constant speed with a variable thickness slab and 2) where the speed of the induction motor was controlled according to the thickness of

R Gouws

2011-01-01

75

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

Microsoft Academic Search

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

Hongwei Gao; Farzad Rajaei Salmasi; Mehrdad Ehsani

2004-01-01

76

Speed and Flux Control of Induction Motors Using Emotional Intelligent Controller  

Microsoft Academic Search

This paper presents a real-time implementation of an improved emotional controller for induction motor (IM) drives. The proposed controller is called brain-emotional-learning-based intelligent controller. The utilization of the new controller is based on the emotion-processing mechanism in the brain and is essen- tially an action selection, which is based on sensory inputs and emotional cues. This intelligent control is based

G. R. Arab Markadeh; Ehsan Daryabeigi; Caro Lucas; M. Azizur Rahman

2011-01-01

77

Adaptive tracking controller for induction motor drives using online training of neural networks  

Microsoft Academic Search

This paper explores means of controlling the dynamics of the stator currents of an induction motor. A neural network-based identification and control scheme is presented. A single artificial neural network is trained to capture the nonlinear dynamics of the motor. A control law is derived using the dynamics captured by the network, and employed to force the stator currents to

Ahmed Rubaai; M. David Kankam

2000-01-01

78

Study on Constant —tension Control of Rolling Machine Based on Induction Motor Drive  

Microsoft Academic Search

The new approach of the constant-tension control of rolling machine is presented in this paper. On the premise of the close-loop control of the induction motor torque, the torque of the induction motor can adjust along with the change of the rolling machine diameter automatically, so the constant-tension control is realized. The rotor speed signal adopted in the system is

Yurong Nan; Li Yu; Congda Lu; Aili Wu

2006-01-01

79

Vector control of induction motor without shaft encoder  

Microsoft Academic Search

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

Tsugutoshi Ohtani; Noriyuki Takada; Koji Tanaka

1992-01-01

80

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

NASA Astrophysics Data System (ADS)

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.

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

81

A fully digitized field-oriented controlled induction motor drive using only current sensors  

Microsoft Academic Search

A field-oriented control method based on a predictive observer with digital current regulation of an induction motor, without speed and voltage sensors, is proposed. Measuring only stator currents and estimating motor speed and rotor fluxes by a predictive state observer with variable pole selection the stator currents are controlled to be exactly equal to the reference currents at every sampling

Lazhar Ben-Brahim; Atsuo Kawamura

1992-01-01

82

Steady-state control of an induction motor with compensation for thermal variation of winding resistance  

Microsoft Academic Search

The effects of saturation on the terminal conditions of an induction motor are examined to provide information on the flux in the machine. A signal is extracted from the observed nonideal waveforms to allow tuning of the model used by the motor controller. This general principle is tested in one special case. A scalar controller, incorporating a form of phase

T. C. Green; B. W. Williams

1989-01-01

83

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

Microsoft Academic Search

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

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

2005-01-01

84

A Quantitative Analysis of Induction Motor Performance Improvement by SCR Voltage Control  

Microsoft Academic Search

Minimum input power and maximum efficiency operation occur at characteristic slip values which can be realized for any induction motor operating at part load by properly adjusting the amplitude of the applied stator terminal voltages. These two criteria are shown to yield perceptibly different results when the motor is driven from a silicon-controlled rectifier (SCR) voltage controller. In addition, it

Timothy M. Rowan; Thomas A. Lipo

1983-01-01

85

An efficient energy controller for an induction motor drive with compensation of temperature using neural networks  

Microsoft Academic Search

A neural network (NN) control is used to implement optimal flux in a vector control variable speed drive. A model of the motor losses allows the NN to calculate the flux for a maximum efficiency in each working point of the induction motor (IM). Taking into consideration the fact that nominal flux is not necessary for load torques below the

B. Pryymak; J. M. Moreno-Eguilaz; J. Percaula

2005-01-01

86

Microprocessor implementation of field-oriented control of induction motors using ANN observers  

Microsoft Academic Search

This paper presents a microprocessor based intelligent controller implemented, in a single processor, for field-oriented induction motor control taking the non-linear parameter variation into account. Previous investigations [2,10] on this subject have neglected the effect of saturation in the air gap flux and hence the corresponding non-linear parameter variation of the induction motor. As the phase angle of rotor magnetizing

W. W. L. Keerthipala; Miao Hua Chun; B. R. Duggal

1997-01-01

87

Optimal Efficiency Control of an Induction Motor Drive  

Microsoft Academic Search

This paper describes a practical method for achieving optimal efficiency over the complete operating range of a variable speed drive. The proposed system adaptively adjusts the flux level in the motor based upon a direct measurement of the power input to the drive. An internal field orientation torque control loop and a speed regulator are employed to maintain the load

Daniel S. Kirschen; Donald W. Novotny; Thomas A. Lipo

1987-01-01

88

An adaptive sliding mode control law for induction motors using field oriented control theory  

Microsoft Academic Search

In this paper, an indirect field-oriented induction motor drive with a sliding-mode controller is presented. The proposed sliding-mode control law incorporates an adaptive switching gain that avoid calculating an upper limit of the system uncertainties. The design also includes rotor speed computation from measured stator terminal voltages and currents. The calculated speed is used as feedback in an indirect vector

O. Barambones; A. J. Garrido; F. J. Maseda; P. Alkorta

2006-01-01

89

Robust speed identification for speed sensorless vector control of induction motors  

Microsoft Academic Search

An approach to estimating induction motor speed from measured terminal voltages and currents for speed-sensorless vector control is described. The proposed technique is very simple and robust to variations of motor parameters. This approach is not dependent upon the knowledge of the value of the stator resistance, nor is it affected by stator-resistance thermal variations. Pure integration of sensed variables,

Fang-Zheng Peng; Tadashi Fukao

1993-01-01

90

Generalized Torque Performance of Two-Phase Induction Motors Controlled by Triac---An Approximate Analysis  

Microsoft Academic Search

In the present work, an analysis concerning the torque performance of a two-phase induction motor is carried out. The analysis is based on the first-harmonic approximation of distorted by triac voltage waveforms and concerns the case where the motor is driven by two quadrature voltages one of which is controlled by a triac. As an extension to the above analysis,

C. A. Karybakas

1981-01-01

91

Insulation fault detection in a PWM controlled induction motor-experimental design and preliminary results  

Microsoft Academic Search

To investigate feature extraction methods for early detection of insulation degradation in low voltage (under 600 V), 3-phase, PWM controlled induction motors, a series of seeded fault tests was planned on a 50 HP, 440 V motor. In this paper, the background and rationale for the test plan are described. The instrumentation and test plan are then detailed. Finally, preliminary

J. Wang; S. McInerny; T. Haskew

2000-01-01

92

FOC and DTC: two viable schemes for induction motors torque control  

Microsoft Academic Search

Field-oriented control and direct torque control are becoming the industrial standards for induction motors torque control. This paper is aimed at giving a contribution for a detailed comparison between the two control techniques, emphasizing advantages and disadvantages. The performance of the two control schemes is evaluated in terms of torque and current ripple, and transient response to step variations of

Domenico Casadei; Francesco Profumo; Giovanni Serra; Angelo Tani

2002-01-01

93

Study on Sliding Mode Speed Control with RBF Network Approach for Doubly-Fed Induction Motor  

Microsoft Academic Search

A nonlinear speed controller for doubly-fed induction motor (DFIM) was designed to counter the effects of the coupling between the electromagnetic torque and the flux. The controller was composed of sliding mode approach, backstepping control, and RBF network approach. The backstepping control was used to implement the precision control. The proposed strategy used RBF network to realize the self-adjusting switching

Li Yuan; He Feng-you; Ye Zong-bin

2009-01-01

94

Direct control strategies based on sensing inductance in switched reluctance motors  

Microsoft Academic Search

The stator winding current commutation timing is the central subject of switched reluctance motor control. The direct use of coil inductance information for current commutation is introduced in this paper. The drawbacks of position-based commutation, in the presence of drifting electrical parameters, are overcome by using the instantaneous coil inductance information. Algorithms to optimize torque using this approach are also

M. Ehsani; K. R. Ramani

1996-01-01

95

Simple and Robust Indirect Thrust Control for Positioning of Linear Induction Motors  

NASA Astrophysics Data System (ADS)

Dealing with position control of Linear Induction Motors (LIM), most strategies in bibliography are based on Secondary Flux Oriented Control (SFOC) and Direct Thrust Control (DTC). However, SFOC of linear induction motors needs complex identification methods to compensate parameter variation during operation, mainly due to local heating and end-effects. On the other hand, DTC based methods for LIMs present thrust ripple and have problems at low and zero speeds. In this paper, a new Indirect Thrust Control (ITC) based strategy for position control of linear induction motors that makes up for these drawbacks is presented. The position control loop design methodology and the method for automatic adjustment of compensators are described. Experimental results are presented to evaluate the performance and sensitivity of the control strategy. Finally, some conclusions are drawn about the applicability of the new algorithm that demonstrate the main advantages versus SFOC and DTC.

Martínez-Iturralde, Miguel; Martínez, Gonzalo; Castelli, Marcelo; Rico, Andrés García; Flórez, Julián

96

Analysis and Performance Evaluation of Triac-Voltage Controlled Capacitor Run Induction Motor  

Microsoft Academic Search

This article presents steady-state analysis and simulation of triac-voltage controlled capacitor run single-phase induction motor driving a domestic fan load. Two schemes of circuits, namely, line controlled and branch controlled configurations, suitable for speed control are considered and simulation results are presented. Also, the two schemes are compared in terms of motor efficiency, line current pollution, and input power factor,

K. SUNDARESWARAN; P. S. MANUJITH

2004-01-01

97

A fault-tolerant control architecture for induction motor drives in automotive applications  

Microsoft Academic Search

This paper describes a fault-tolerant control system for a high-performance induction motor drive that propels an electrical vehicle (EV) or hybrid electric vehicle (HEV). In the proposed control scheme, the developed system takes into account the controller transition smoothness in the event of sensor failure. Moreover, due to the EV or HEV requirements for sensorless operations, a practical sensorless control

D. Diallo; M. E. H. Benbouzid; A. Makouf

2004-01-01

98

Fuzzy Sliding-Mode Speed Control with Torque Observer in Induction Motor Drive  

Microsoft Academic Search

A fuzzy sliding-mode speed controller with torque feed forward compensation was proposed for high performance IM drive application. Firstly the sliding-mode speed controller of asynchronous induction motors was designed. Then, the fuzzy control was used for optimizing the switching on the sliding surface, meanwhile, the observed torque was employed to improve the robust of speed controller. Finally, the good performance

Shengxian Zhuang; Yulin He; Senlin Wang

2006-01-01

99

Design and implementation of a fuzzy controller for a high performance induction motor drive  

Microsoft Academic Search

A limit-cycle controlled induction motor drive with a fuzzy controller has been designed and implemented. The torque and flux of the proposed drive system are regulated by the limit-cycle control technique. It follows that very quick torque response can be achieved. Since the dynamic model of this type of drive system is not easy to obtain, a fuzzy controller was

Chang-Ming Liaw; Jin-Biau Wang

1991-01-01

100

AC induction motor efficiency  

Microsoft Academic Search

The author discusses those factors which determine the efficiency and rating of polyphase AC induction motors. The loss mechanisms are described and are related to the performance and design characteristics of the motor, such as the operating flux density, the winding turns distribution, the current density in the windings, the motor speed torque characteristic, and the motor efficiency itself. The

S. D. Umans

1989-01-01

101

Self-tuning fuzzy logic speed controller for induction motor drives  

Microsoft Academic Search

In this paper a self-tuning fuzzy logic speed controller is proposed for the high performance drives of induction motor. Here, the output gain of the controller is adjusted on-line by fuzzy rules according to the current trend of the controlled process. Tuning of the output gain has been given the highest priority because of its strong influence on the performance

Y. Milotid; A. Miloudi; M. Mostefai; A. Draou

2004-01-01

102

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

Microsoft Academic Search

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.

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

1996-01-01

103

Stator resistance identification using artificial intelligent technique for the adaptive controller of magnetically saturated induction motor  

Microsoft Academic Search

The problem of controlling the induction motor ?-model with magnetic saturation is considered using an adaptive controller with stator current and rotor speed measurement. The new in this paper that in the previous work, only the rotor resistance and load torque can be adapted using the controller but in this work, using artificial intelligent technique, an adaptation of the stator

Ismail Mohamed Mahmoud

2010-01-01

104

Iron core losses: measurement and impact in induction motor vector control  

Microsoft Academic Search

In the present paper, the influence of iron core losses on the vector controlled induction motor performance is-presented. The equivalent iron core loss resistance is experimentally identified from no-load tests with PWM and sinusoidal supplies. The amount of detuning caused by the iron core losses is analysed for indirect rotor flux oriented control (RFOC) and stator flux oriented control (SFOC)

M. Benhaddadi; O. Touhami; S. Moulahoum; G. Olivier

1998-01-01

105

Asynchronous induction roller motors  

Microsoft Academic Search

Problems of designing special modifications of roller induction motors of ARM2P type for variable-frequency electric drives\\u000a have been considered. Motor designs, energy indices, and adjustment properties are presented.

A. E. Gusel’nikov; V. S. Baklin; P. R. Baranov

2008-01-01

106

Sensorless Control of Synchronous Reluctance Motors based on an Extended Electromotive Force Model and Inductance Measurement in the Model  

Microsoft Academic Search

In this paper, sensorless control for synchronous reluctance motors (SynRMs) without signal injection and an inductance measurement for position estimation are proposed. In the case of SynRMs, accuracy of inductances is the most important thing to realize precise position estimation because inductances are largely varied by a magnetic saturation phenomenon. Therefore, the inductance measurement method, which can measure appropriate inductances

Shinji Ichikawa; Mutuwo Tomita; Shinji Doki; Shigeru Okuma

2005-01-01

107

Accelerated insulation aging in phase angle controlled single phase induction motors  

Microsoft Academic Search

Thyristor based, phase angle controlled, speed regulators are widely used for energy efficient control of single-phase induction motors. This leads to power saving but adversely affects the life of insulation in the motors due to non-sinusoidal voltage and current waveforms. The accelerated insulation ageing is due to increased voltage peaks, voltage transients, sharp dV\\/dt and increased thermal stress. Voltage harmonics

T. G. Arora; M. V. Aware; D. R. Tutakne

2009-01-01

108

A dynamic decoupling control scheme for high-speed operation of induction motors  

Microsoft Academic Search

In a high-speed operation of a vector-controlled induction motor, coupling between d-q current dynamics impairs the characteristics of torque response. The feedforward decoupling scheme does not perform well if an error exists in the motor parameter estimation. We derive a dynamic decoupling condition when the two additional proportional integral current controllers are used. A great advantage of this dynamic decoupling

Jinhwan Jung; Kwanghee Nam

1999-01-01

109

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

PubMed Central

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.

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

2012-01-01

110

Fuzzy logic based rotor resistance estimator of an indirect vector controlled induction motor drive  

Microsoft Academic Search

A simple method for estimating rotor resistance in an indirect vector-controlled induction motor drive is proposed in this paper. The proposed rotor resistance estimator which uses fuzzy logic principle is based on the improvement of control performance when mismatch between estimated rotor resistance and actual one occurs. Analysis, design, and digital simulations are carried out to demonstrate the effectiveness of

Y. Miloud; A. Draou

2002-01-01

111

Online H? speed control of sensorless induction motors with rotor resistance estimation  

Microsoft Academic Search

This paper proposes an online technique for the H? control of speed and flux norm of current-fed induction motors (IM). Integrals of the speed and flux norm tracking errors are considered as elements of the state variables. A robust H?, optimal control strategy for this problem is determined by solving the algebraic Riccati equation (ARE), using multilayer recurrent neural networks.

P. V. Medagam; F. Pourboghrat

2007-01-01

112

Speed and rotor resistance estimation for torque control of an induction motor  

Microsoft Academic Search

A speed sensorless controller of an induction motor (IM) with rotor resistance estimation is presented. In the controller design only the stator current and voltage signals are assumed to be measurable. The rotor resistance and speed estimates are obtained as a solution of a linear algebraic system with pseudo current and voltage signals and their observable derivatives as inputs. The

A. T. Zaremba; S. V. Semenov

2000-01-01

113

An effective identification of rotor resistance for induction motor vector control  

Microsoft Academic Search

Nowadays, vector control induction motor have gained wide acceptance in high performance applications. Crucial to the success of the indirect vector control is the knowledge of the instantaneous position of the rotor flux. This requires a priori knowledge of rotor time constant which varies with rotor temperature. So, the variations of rotor circuit time constant can cause significant performance deterioration

M. Benhaddadi; K. Yazid; R. Khaldi

1997-01-01

114

Output feedback control of current-fed induction motors with unknown rotor resistance  

Microsoft Academic Search

On the basis of a third-order reduced model of an induction motor (current-fed) the authors design an output feedback control (from rotor speed measurements) which guarantees global exponential tracking of speed and rotor flux modulus reference signals. An adaptive version is designed when load torque is constant and unknown. The rotor resistance, which is a crucial parameter for the control,

Riccardo Marino; Sergei Peresada; Patrizio Tomei

1996-01-01

115

Robust control using neural network uncertainty observer for linear induction motor servo drive  

Microsoft Academic Search

A robust controller, that combines the merits of integral-proportional (IP) position control and neural network (NN) observed technique, is designed for a linear induction motor (LIM) servo drive in this study. First, the secondary flux of the LIM is estimated using a sliding-mode flux observer on the stationary reference frame and the feedback linearization theory is used to decouple the

Faa-Jeng Lin; Rong-Jong Wai

2002-01-01

116

Speed-sensorless direct torque control of induction motors using an adaptive flux observer  

Microsoft Academic Search

This paper presents a new sensorless induction motor drive. The drive uses an adaptive flux observer for speed estimation and the discrete-time direct torque control technique for torque and stator flux control. The adaptive flux observer uses a mechanical model to improve the behavior during speed transients. The estimated stator flux of the adaptive observer is used in the discrete-time

Jehudi Maes; Jan A. Melkebeek

2000-01-01

117

New direct torque control of induction motor for minimum torque ripple and constant switching frequency  

Microsoft Academic Search

In this paper, a direct torque control (DTC) method of an induction machine is proposed which enables the minimum torque ripple control, while maintaining constant switching frequency. Some drawbacks of the conventional DTC are the relatively large torque ripple in a low speed range and the variation of switching frequency according to the amplitude of hysteresis bands and the motor

Jun-Koo Kang; Seung-Ki Sul

1999-01-01

118

The Analysis of Induction Motors with Voltage Control by Symmetrically Triggered Thyristors  

Microsoft Academic Search

The application of thyristor switching to induction motor speed control has resulted in a number of unconventional supply systems. One such technique, which has been successfully employed in a number of applications, is variable voltage control by means of symmetrically triggered thyristors in the stator phases of a wye-connected machine. In this paper, an analytic method for predicting the steady-state

T.A. Lipo

1971-01-01

119

A Rotor Parameter Identification Scheme for Vector-Controlled Induction Motor Drives  

Microsoft Academic Search

A rotor parameter identification technique for the purpose of updating the control gains of an induction motor vector controller is described. The approach utilizes the current source nature of a current-regulated PWM inverter by injecting a prescribed negative sequence current perturbation signal. The corresponding negative sequence voltage is sensed and decomposed into its d and q components. By injecting the

Takayoshi Matsuo; Thomas A. Lipo

1985-01-01

120

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

Microsoft Academic Search

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

D. Hadiouche; H. Razik; A. Rezzoug

2000-01-01

121

A PC-based architecture for parameter analysis of vector-controlled induction motor drive  

Microsoft Academic Search

In this article a methodology for constructing a user interface for system control and data acquisition of a drive which is suitable for three-phase induction motors (3?IM) is presented. The entire hardware implementation is shown, including power and digital stages. Communication between the computer and the controller is engaged in order to enhance an analysis of power quality, adjust the

Carlos A. Gonzalez-Gutierrez; Juvenal Rodriguez-Resendiz; Georgina Mota-Valtierra; Edgar A. Rivas-Araiza; Jorge D. Mendiola-Santibañez; Ricardo Luna-Rubio

122

Maximum Torque Production in Rotor Field Oriented Control of an Induction Motor at Field Weakening  

Microsoft Academic Search

This paper presents a highly dynamic rotor flux- oriented control system of an induction motor in the field weakening region. The control system guarantees maximum torque production taking into account voltage and current limits. The approach permits operation without using a speed sensor. The system is investigated by simulation in real time and experimentally using a fixed point microcontroller.

H. Abu-Rub; H. Schmirgel; J. Holtz

2007-01-01

123

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

Microsoft Academic Search

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

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

1995-01-01

124

Indirect field-oriented control of induction motor: new design leads to improved performance and efficiency  

Microsoft Academic Search

A new design strategy is proposed for the development of indirect field-oriented induction motor controllers. It allows achieving global asymptotic speed-flux tracking in presence of unknown load torque and it combines improved robustness and energy efficiency, with a simple procedure for controller parameters' tuning and low implementation complexity

Sergei Peresada; Andrea Tilli; Alberto Tonielli

1998-01-01

125

Speed control of induction motors using a novel fuzzy sliding-mode structure  

Microsoft Academic Search

This paper presents a new approach to indirect vector control of induction motors. Two nonlinear controllers, one of sliding mode type and the other PI-fuzzy logic-based, define a new control structure. Both controllers are combined by means of an expert system based on Takagi-Sugeno fuzzy reasoning. The sliding-mode controller acts mainly in a transient state while the PI-like fuzzy controller

F. Barrero; A. Gonzalez; A. Torralba; E. Galvan; L. G. Franquelo

2002-01-01

126

Design and Implementation of PLC-Based Monitoring Control System for Three-Phase Induction Motors Fed by PWM Inverter  

Microsoft Academic Search

This paper presents a design and implementation of a monitoring and control system for the three-phase induction motor based on programmable logic controller (PLC) technology. Also, the implementation of the hardware and software for speed control and protection with the results obtained from tests on induction motor performance is provided. The PLC correlates the operational parameters to the speed requested

YASAR BIRBIR; H. SELCUK NOGAY

2007-01-01

127

Speed and efficiency control of an induction motor with input-output linearization  

SciTech Connect

A combination of a composite adaptive speed controller and an explicit efficiency control algorithm is proposed to control the speed and power efficiency of the induction motor in this paper. First, the input-output linearization method is used to dynamically decouple the motor speed and rotor flux. Then, a composite adaptive control algorithm is designed to control the speed of the induction motor. At steady-state light-load conditions, the magnetizing current command is adjusted on the basis of the product of magnetizing current command and torque current command such that the steady-state power loss is minimum. A PC-based experimental drive system has been implemented, and some experimental results are provided to demonstrate the effectiveness of the presented approach.

Wang, W.J.; Wang, C.C.

1999-09-01

128

Digital Signal Processor Based V\\/f Controlled Induction Motor Drive  

Microsoft Academic Search

The TMS320 - based control systems have numerous advantages. The high processing speed of the TMS320 family allows sophisticated control techniques to be used to build a high-precision control system. The experimental results for the V\\/f control of 3-hp induction motor drives controlled by a digital signal processor micro 2407 TMS320 chip have verified the effectiveness of the proposed scheme.

C. S. Kamble; J. G. Chaudhari; M. V. Aware

2010-01-01

129

Improvement of induction motor drive systems supplied by photovoltaic arrays with frequency control  

SciTech Connect

The overall efficiency of an induction motor drive system, powered by a photovoltaic (PV) array, drops significantly when the insolation condition varies away from its nominal level. This problem can be overcome using a control method in which the frequency of the inverter's PWM control signal is adjusted according to the insolation and temperature conditions. The motor speed and, therefore, the power delivered to the load, are adjusted by controlling the inverter's frequency. This eliminates the mismatch between the maximum power that is available from the source and the power that is required by the load. Simulation results presented in this paper show that using the proposed control system allows the induction motor drive system to maintain its optimum efficiency and deliver consistently more power to the load when insolation and temperature vary from the nominal level. This method also offers an improvement in the system stability method.

Yao, Y.; Ramshaw, R.S. (Univ. of Waterloo, Ontario (Canada). Dept. of Electrical and Computer Engineering); Bustamante, P. (Novatronics Inc., Stratford, Ontario (Canada))

1994-06-01

130

Applications of induction motors and stepping motors in small scale position control systems  

Microsoft Academic Search

A control system that can make an AC motor or stepping motor perform positioning simply was developed. This system can be satisfactorily applied to a positioning system with a minimum increment of 1.8 degrees\\/pulse, and if an encoder with 10000 pulses\\/rev is applied, positioning accuracy of even 1 ?m can be possible with the use of a ball screw of

K. Yamaji; T. Mizuno; Y. Muraoka; N. Ishii

1990-01-01

131

Cascade fuzzy variable structure control of induction motor based on the approach of fuzzy modelling of Ben-Ghalia  

Microsoft Academic Search

In this article, a control design concept using fuzzy sets for an induction motor is presented. The aim of the proposed modelling approach is to provide a fuzzy set-based representation of the cascade sliding mode control of an induction motor fed by PWM voltage source inverter, which operates in a fixed reference frame. For this purpose, a new decoupled and

L. Barazane; P. Sicard; R. Ouiguini

2009-01-01

132

A novel on-line rotor resistance estimation method for vector controlled induction motor drive  

Microsoft Academic Search

This work proposed an on-line rotor resistance estimation method for the direct field oriented control of an induction motor drive. MRAS method by using the instantaneous reactive power (IRP) as models is utilized. This approach is completely robust to the stator resistance's thermal variation. Moreover, it doesn't use the pure integrator so that It has not the problems of the

Huang Bin; Qu Wenlong; Lu Haifeng

2004-01-01

133

Global adaptive output feedback control of induction motors with uncertain rotor resistance  

Microsoft Academic Search

We design for the first time a global adaptive output feedback control for induction motors, which guarantees asymptotic tracking of smooth speed references only on the basis of speed and stator current measurements, for any initial condition and for any unknown constant value of torque load and rotor resistance. These two parameters are the only ones which largely vary during

R. Marino; S. Peresada; P. Tomei

1996-01-01

134

Global adaptive output feedback control of induction motors with uncertain rotor resistance  

Microsoft Academic Search

The authors design a global adaptive output feedback control for a fifth-order model of induction motors, which guarantees asymptotic tracking of smooth speed references on the basis of speed and stator current measurements, for any initial condition and for any unknown constant value of torque load and rotor resistance. The proposed seventh-order nonlinear compensator generates estimates both for the unknown

Riccardo Marino; Sergei Peresada; Patrizio Tomei

1999-01-01

135

Robust control against rotor resistance variation for speed sensorless induction motors  

Microsoft Academic Search

In this paper, a new speed sensorless induction motor scheme which can estimate rotor speed and rotor resistance simultaneously is described. The rotor flux reference is given as sinusoidal waveform to conduct on-line simultaneous estimation of the rotor speed and the rotor resistance without affecting precise torque control. The estimation can be performed under the condition of not only steady

Z. G. Lee; S. K. Jeong; S. S. You; J. S. Yoon

2005-01-01

136

High-performance sensorless vector control of induction motor drives using artificial intelligent technique  

Microsoft Academic Search

This paper presents a sensorless speed observer method of an induction motor using an artificial intelligent technique in field-oriented control system. Speed and rotor flux are estimated from only measurable variables, the stator voltages and currents. The proposed estimation algorithm uses a deterministic state observer combined with an intelligent adaptive mechanism based on fuzzy logic, and using a knowledge base

Mokhtar Zerikat; Abdelkader Mechernene; Soufyane Chekroun

2010-01-01

137

Speed sensorless vector control of induction motor using extended Kalman filter  

Microsoft Academic Search

A vector control of an induction motor by an estimated speed using an extended Kalman filter is proposed. With this method, the states are composed of stator current and rotor flux. The rotor speed is regarded as a parameter, and the composite states consist of the original states and the rotor speed. The extended Kalman filter is employed to identify

Young-Real Kim; Seung-Ki Sul; Min-Ho Park

1994-01-01

138

State-Variable Steady-State Analysis of a Controlled Current Induction Motor Drive  

Microsoft Academic Search

The exact equations defining steady-state operation of a controlled current induction motor drive system are derived by solving the system state equations in the stationary reference frame. These equations, which assume ideal current filtering, eliminate the difficulties involved in taking derivatives of discontinuous currents by defining a pair of pseudocurrent variables. Effects of saturation are included by using the slope

Thomas A. Lipo; Edward P. Cornell

1975-01-01

139

A linear induction motor control system for magnetically levitated carrier system  

Microsoft Academic Search

An electromagnetic suspension system has been developed that cuts off electric power-collecting devices from a magnetically levitated vehicle. This system makes it possible to transport materials with no mechanical contact at all between the vehicle and ground facilities. A control system for linear induction motors used in the magnetically levitated carrier system is described. The system was developed to transport

Teruo Azukizawa; Mimpei Morishita; Shuji Kanda; Noboru Tamura; Toyohiko Yokoyama

1989-01-01

140

High-resolution miniaturized inductive proximity sensor: characterization and application for step-motor control  

Microsoft Academic Search

A resolution better than 50 nm has been achieved with a new miniaturized inductive proximity sensor. This sensor microsystem is made of a 1 mm diameter coil connected to a new and highly sensitive ASIC based on a differential relaxation oscillator. Lateral as well as axial resolutions have been characterized. A microsystem for step-motor control with an accuracy better than

Ph. A. Passeraub; P. A. Besse; S. Hediger; Ch. de Raad; R. S. Popovic

1998-01-01

141

Adaptive Speed Sensorless Vector Control of Induction Motor using Singularly Perturbed Sliding Mode Observer  

Microsoft Academic Search

This paper presents a new approach for sensorless vector control of induction motor using singularly perturbed sliding mode observer. This approach is based on the singular perturbation theory which decomposes the original system of the observer error dynamics into separate slow and fast subsystems and permits a simple design and sequential determination of the observer gains. In this way, the

A. Mezouar; M. K. Fellah; S. Hadjeri; Y. Sahali

2006-01-01

142

A robust fuzzy speed estimation for vector control of an induction motor  

Microsoft Academic Search

This work addresses the analysis and the design of an adaptive fuzzy sliding-mode observer applied to vector control of an induction motor. The conception steps for the conventional sliding-mode speed observer (SMO) are laid down clearly. In this work, the drawbacks of SMO in terms of high observer gains and chattering phenomenon due of switching surface are overcome by merging

K. Kouzi; M.-S. Nait-Said; M. Hilairet; E. Berthlot

2009-01-01

143

Research on control method of induction motor for fuel cell hybrid vehicles  

Microsoft Academic Search

A test and research platform of fuel cell hybrid system for electric vehicles is independently researched and developed. And then, an integrated designed project of power distribution unit for fuel cell hybrid vehicle is preliminarily analyzed. On that basis, a high efficiency, high performance and wide speed adjustable range control strategy of induction motor for fuel cell hybrid vehicle is

Zheyi Jiang; Dawei Gao; Jiajia Wu; Zhiyuan Xuan; Jieyuan Wei

2011-01-01

144

Steady State Performance Analysis of SCR Controlled Induction Motors: A Closed Form Solution  

Microsoft Academic Search

The steady state performance of three-phase induction motors with supply voltage controlled by cyclically-triggered in-line thyristors is analyzed in terms of phase variables rather than d-q axis variables. A closed form solution is obtained. Application of the method is illustrated and sample results presented for comparision purposes.

L. X. Le; G. J. Berg

1984-01-01

145

Convergence improvement of efficiency-optimization control of induction motor drives  

Microsoft Academic Search

This paper proposes a novel algorithm for efficiency optimization control of induction motor (IM) drives. The algorithm uses the “golden section technique” in the process searching the optimal value of rotor flux current reference, for which the electrical input power of the system is minimal. The search algorithm is very fast and does not require a priori the number of

Minh Ta-Cao; Yoichi Hori

2000-01-01

146

Nonlinear control of induction motors: torque tracking with unknown load disturbance  

Microsoft Academic Search

Ortega and Espinosa (1993) presented a globally stable controller for torque regulation of a complete induction motor model with partial state feedback, i.e., no assumption of flux measurement. The result was established under the assumptions that both the desired and load torques are constant, that the former does not exceed certain bounds which depend on the systems natural damping, and

Romeo Ortega; Carlos Canudas; Seleme I. Seleme

1993-01-01

147

Stability Analysis of Induction Motor Drives Using Phase-Locked Loop Control System  

Microsoft Academic Search

This paper presents the analysis of an induction motor drive using a phase-locked loop speed control system. A linear continuous model of the drive is developed and the system response is analysed using conventional root locus techniques. Various compensating ``filters'' and feedback signals are considered and the need for addition of derivative feedback is shown. A sampled data model is

Paresh C. Sen; Murray L. MacDonald

1980-01-01

148

An innovative direct self-control scheme for induction motor drives  

SciTech Connect

The paper presents a new direct self-control (DSC) scheme for induction motor drives using the stator voltage third harmonic component in order to estimate the air-gap flux and the torque as well as to synchronize the supply voltage vector. Compared to previous DSC schemes the new one is independent from any motor parameter variation, specifically on stator resistance thus showing better performances at low speeds. The paper starts with a quick review on standard DSC main features pointing out the influence of stator resistance variations on the flux and torque control. The new DSC scheme is then introduced and evaluated by simulations and experimental tests on a 1.5-kW induction motor drive.

Bonanno, F.; Consoli, A.; Raciti, A.; Testa, A. [Univ. degli Studi di Catania (Italy). Dept. Elettrico Elettronico e Sistemistico

1997-09-01

149

An Adaptive Speed Controller for Induction Motor Drives Using Adaptive Neuro-Fuzzy Inference System  

Microsoft Academic Search

This study develops an adaptive speed controller from the adaptive neuro-fuzzy inference system (ANFIS) for an indirect field-oriented\\u000a (IFO) induction motor drive. First, a two-degree-of-freedom controller (2DOFC) is designed quantitatively to meet the prescribed\\u000a speed command tracking and load regulation responses at the nominal case. When system parameters and operating conditions\\u000a vary, the prescribed control specifications cannot be satisfied. To

Kuei-hsiang Chao; Yu-ren Shen

2007-01-01

150

High-performance induction motor control via input-output linearization  

Microsoft Academic Search

We have shown that a current-command input-output linearization controller can achieve high-performance motion control, that is, the precise tracking of a fast point-to-point position reference. Specifically, this controller was shown to provide the means of decoupling the speed and flux dynamics in an induction motor. This decoupling of speed and flux was exploited to simultaneously track the position\\/speed reference and

Marc Bodson; John Chiasson; Robert Novotnak

1994-01-01

151

Digital simulation of field-oriented control of induction motor drives using EMTP  

Microsoft Academic Search

The use of the electromagnetic transients program (EMTP) to simulate the field-oriented control in an induction-motor drive system, prior to its hardware implementation, is described. Specifically, the interface needed between the universal machine model within EMTP and the field-orientation control is described. The results include torque and speed control, effect of incorrect rotor time constant, and the simulation results of

Z. Daboussi; N. Mohan

1988-01-01

152

Nonlinear sliding-mode torque control with adaptive backstepping approach for induction motor drive  

Microsoft Academic Search

In this paper, the nonlinear sliding-mode torque and flux control combined with the adaptive backstepping approach for an induction motor drive is proposed. Based on the state-coordinates transformed model representing the torque and flux magnitude dynamics, the nonlinear sliding-mode control is designed to track a linear reference model. Furthermore, the adaptive backstepping control approach is utilized to obtain the robustness

Hsin-Jang Shieh; Kuo-Kai Shyu

1999-01-01

153

COMPARISON BY SIMULATION OF THREE-LEVEL INDUCTION MOTOR TORQUE CONTROL SCHEMES FOR ELECTRIC VEHICLE APPLICATIONS  

Microsoft Academic Search

This paper presents the results of an investigation into suitable torque control schemes for an electric vehicle application. The e lectric vehicle drive consists of rewound induction motors and a three-level IGBT inverter switching at 10kHz. The schemes investigated are Field Oriented Control, Direct Torque Control (DTC), DTC using Space Vector Modulation, and DTC with Minimal Torque Ripple. The results

J. C. Trounce

154

DIRECT FIELD-ORIENTED CONTROL USING BACKSTEPPING STRATEGY WITH FUZZY ROTOR RESISTANCE ESTIMATOR FOR INDUCTION MOTOR SPEED CONTROL  

Microsoft Academic Search

In this paper, the speed control of an induction motor using backstepping design with fuzzy rotor resistance estimation is proposed. First, the direct field oriented control IM is derived. Then, a backstepping for direct field oriented control is proposed to compensate the uncertainties, which occur in the control. Finally, a method of estimation of the rotor resistance in the backstepping

Ismail Khalil Bousserhane; Abdeldjabbar Hazzab; Mostefa Rahli; Mokhtar Kamli; Benyounes Mazari

2006-01-01

155

Stability synthesis of control system in current fed inverter driven induction motor  

SciTech Connect

This paper presents a new method of synthesizing a stabilizing control system in current fed inverter driven induction motor (CFIDIM). The method is focused on rotor dynamics and a concept of ''damping torque coefficient (DTC)'' is introduced concerning the electrical torque. At first the control system is synthesized on the assumption that an induction motor is driven by an ideally controllable current source. Then perturbed linearized technique indicates that the system can be stabilized if the stator current or frequency is controlled so as to make the DTC positive by feeding back a signal composed of rotor speed. Next, based on this fact, an approach of synthesizing the converter output voltage is presented under a fixed stator frequency. This result clarifies that the stable operation can be achieved by controlling the voltage in proportion to the acceleration of rotor speed or the deviation of electrical torque. These analytical results are verified with laboratory field tests.

Veda, R.; Irisa, T.; Ito, T.; Mochizuki, T.; Sonoda, T.

1983-01-01

156

On-line stator and rotor resistance estimation scheme for vector-controlled induction motor drive using artificial neural networks  

Microsoft Academic Search

This paper presents a new method of on-line estimation for the stator and rotor resistances of the induction motor in the indirect vector controlled drive, using artificial neural networks. The back propagation algorithm is used for training of the neural networks. The error between the desired state variable of an induction motor and the actual state variable of a neural

Baburaj Karanayil; Muhammed Fazlur Rahman; Colin Grantham

2003-01-01

157

Implementation of an on-line resistance estimation using artificial neural networks for vector controlled induction motor drive  

Microsoft Academic Search

This paper presents a new method of on-line estimation for the stator and rotor resistances of the induction motor in the indirect vector controlled drive, using artificial neural networks. The backpropagation algorithm is used for training of the neural networks. The error between the desired state variable of an induction motor and the actual state variable of a neural model

B. Karanayil; M. F. Rahman; C. Grantham

2003-01-01

158

Fuzzy logic based on-line efficiency optimization control of an indirect vector-controlled induction motor drive  

Microsoft Academic Search

Improvement of adjustable speed drive system efficiency is important not only from the viewpoints of energy saving and cooling system operation, but also from the broad perspective of environmental pollution. The paper describes a fuzzy logic based on-line efficiency optimization control of a drive that uses an indirect vector controlled induction motor speed control system in the inner loop. At

G. C. D. Sousa; Bimal K. Bose; John G. Cleland

1995-01-01

159

Model following adaptive controller with rotor resistance estimator for induction motor servo drives  

Microsoft Academic Search

This paper presents an indirect field-oriented (IFO) induction motor position servo drive which uses the model following adaptive controller with the artificial neural network (ANN)-based rotor resistance estimator. The model reference adaptive system (MRAS)-based a 2-layer artificial neural network estimates the rotor resistance on-line and a linear model following position controller is designed by using the estimated rotor resistance value.

Woo-yong Han; Sang-min Kim; L. Chang-goo

2001-01-01

160

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

SciTech Connect

This paper describes a model-reference adaptive system (MRAS) for the estimation of induction motor speed from measured terminal voltages and currents. 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 implemented on a 30-hp laboratory drive, where its effectiveness has been verified.

Schauder, C. (Science and Technology Center, Westinghouse Electric Corp., Pittsburgh, PA (United States))

1992-10-01

161

Triac Speed Control of Three-Phase Induction Motor with Phase-Locked Loop Regulation  

Microsoft Academic Search

The speed control of a three-phase squirrel cage induction motor by employing triacs in the lines which operate in the normal phase control mode is described. The inherent limitation of low circuit commutated (dv\\/dt), which makes the triac circuit somewhat unreliable, has been overcome by suitably designing the snubber circuit. The closed-loop speed regulation of the system is then investigated

William L. Kenly; Bimal K. Bose

1976-01-01

162

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

Microsoft Academic Search

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

Marian P. Kazmierkowski; Giuseppe Buja

2003-01-01

163

Speed control of three phase induction motor using single phase supply along with active power factor correction  

Microsoft Academic Search

Majority of industrial drives use electric motors, since they are controllable and readily available. In practice, most of these drives are based on ac induction motor because these motors are rugged, reliable, and relatively inexpensive. The proposed technique of single phase to three phase conversion has a wide range of applications in rural areas and also in industries where three

Pradeep M Patil; Sanjay L Kurkute

2006-01-01

164

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

Microsoft Academic Search

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

Geng Yang; Tung-Hai Chin

1993-01-01

165

A 40Pulse AC--DC Converter Fed Vector-Controlled Induction Motor Drive  

Microsoft Academic Search

In this paper, a novel autotransformer for a 40-pulse ac-dc converter configuration is designed, modeled, simulated, and implemented to feed vector-controlled induction motor drive (VCIMD). The proposed converter consists of two paralleled ten-pulse ac-dc converters along with pulse doubling circuit at dc bus. Each ten-pulse ac-dc converter involves five-phase diode bridge rectifiers. It improves power quality at ac mains, and

Bhim Singh; Sanjay Gairola

2008-01-01

166

Identification of the machine parameters in a vector-controlled induction motor drive  

Microsoft Academic Search

High dynamic performance of pulse-width-modulated (PWM) inverter-fed induction motor drives was achieved by using the method of field-oriented control. This method requires the actual value of the rotor time constant as essential system information, based on how the magnitude and the position of the rotor flux are calculated. An online identification technique for the rotor time constant and for other

Joachim Holtz; Thomas Thimm

1991-01-01

167

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

Microsoft Academic Search

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

Steven Geppert; James M. Slicker

1984-01-01

168

Optimization of Position Control of Induction Motors using Compact Genetic Algorithms  

Microsoft Academic Search

This paper describes a design procedure for a cascaded control system of induction motors based on compact genetic algorithms (cGAs). CGAs are search methods that process a probability vector (describing the distribution of a hypothetical population) with update rules inspired to the typical selection and recombination operations of a GA. The cGAs well lend themselves to real-time implementations in constrained,

Francesco Cupertino; Ernesto Mininno; Erika Lino; David Naso

2006-01-01

169

Measured efficiency improvements of induction motors with thyristor\\/triac controllers  

Microsoft Academic Search

The deployment of inexpensive thyristor\\/triac controllers improves the efficiency and does not increase the power factor of induction motors (as measured at the input of pole transformer) operating under variable torque and constant speed constraints. Computer-aided testing yields detailed input\\/output powers for the drive. The improvement of the power factor does not increase the real-power capability (RPC) of a transformer

Ewald F. Fuchs; William J. Hanna

2002-01-01

170

A new design for four switch three phase inverter based on FPGA for induction motor control  

Microsoft Academic Search

This paper presents a realization of the space-vector pulse-width modulation (SVPWM) strategy for control system induction motor (IM). In this paper is presented a space vector PWM algorithm for four switch three phase inverters (B4, FSTPI) based on the one for six switch three phase inverters (B6, SSTPI) (principle of similarity) where the ¿?? plan is divided into 6 sectors

Hong Hee Lee; Phan Quoc Dzung; Le Minh Phuong; Le Dinh Khoa

2009-01-01

171

Advanced control of induction motor based on load angle estimation  

Microsoft Academic Search

An advanced control system with load angle adjustment is introduced. The method is based on the action of a phase-locked loop, in which a position synchronization of two vectors to obtain a constant command angle between them is realized. In the system presented, the vectors are stator current and rotor flux. The load angle is kept constant by changing the

Haithem Abu-Rub; Jaroslaw Guzinski; Zbigniew Krzeminski; Hamid A. Toliyat

2004-01-01

172

Speed sensorless field-oriented control of induction motor with rotor resistance adaptation  

Microsoft Academic Search

Several field-oriented induction motor drive methods without rotational transducers have been proposed. These methods have a disadvantage that the rotor resistance variation causes an estimation error of the motor speed. Therefore, simultaneous estimation of the motor speed and the rotor resistance is required. This paper presents a method of estimating simultaneously the motor speed and the rotor resistance of an

Hisao Kubota; Kouki Matsuse

1994-01-01

173

An Energy-Saving Scheme of Variable Voltage Control for Three-Phase Induction Motor Drive Systems  

Microsoft Academic Search

This paper presents a control scheme to implement the energy-savings of three-phase induction motors when they operate under long-term light-load or small duty ratio load. The proposed scheme is based on the principle of variable voltage control (VVC) at constant speed. The energy-saving controller for three-phase induction motors is developed. A group of the experiments demonstrate that the proposed scheme

X. D. Xue; K. W. E. Cheng

2006-01-01

174

Load Effects of Nola-Type Induction Motor Power-Factor Controllers on Fuel-Cell Inverters.  

National Technical Information Service (NTIS)

This report covers tests performed on power inverters using Nola-type power factor controllers (PFC) and fractional horsepower single-phase induction motors as loading devices. The inverters were designed for integral operation with fuel cell power plants...

1982-01-01

175

Electrical vehicle drive control based on finite element induction motor model  

SciTech Connect

In electrical vehicle applications, AC drives have become attractive rivals of DC drives due to the evolution in semiconductor technology. A paramount concern in such applications is the overall efficiency of the motor and its PWM controller. In this paper, the methodology for determination of an induction motor model including parameter variations for different operating conditions is presented. The method is based on finite elements, and alternative techniques enabling to derive the equivalent circuit parameters from the field solution are described and discussed. The suitability of different techniques for the consideration of time variations in the application considered, such as complex variables and time stepping techniques, has been commented. The derived parameters are in good agreement with the low frequency response of the motor when supplied by a PWM inverter.

Kandianis, T.; Kladas, A.G.; Manias, S.N.; Tegopoulos, J.A. [National Technical Univ., Athens (Greece)

1997-03-01

176

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

DOEpatents

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.

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

1984-01-01

177

Finite element analysis of direct thrust-controlled linear induction motor  

SciTech Connect

This paper describes the finite element analysis of a direct thrust-controlled linear induction motor (LIM). The time-stepping finite element method and the moving mesh technique are used to calculate the dynamic characteristics of LIM during the direct thrust control. Because LIM has the end effect, thrust correction coefficient is introduced to predict an actual thrust in control. The simulation results, the thrust and the stator flux linkage are shown below and the stator current is compared with an experimental one.

Kwon, B.I.; Woo, K.I.; Kim, S. (Hanyang Univ., Ansan (Korea, Republic of). Dept. of Electrical Engineering)

1999-05-01

178

Modeling and implementation of a microprocessor-based CSI-fed induction motor drive using field-oriented control  

Microsoft Academic Search

A new approach to model the current-source-inverter-fed induction motor drive is presented. The mathematical model takes into account the rectifier, inverter, and induction motor dynamics and is established in the stationary reference frame. For controlling the drive speed, a modified indirect field-oriented control is proposed. To counter the effects of torque pulsations at very low speeds and rotor resistance variation,

Chang-Huan Liu; Chen-Chain Hwu; Ying-Fang Feng

1989-01-01

179

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

Microsoft Academic Search

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

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

2000-01-01

180

Speed Sensorless Vector Control of an Induction Motor using Spiral Vector Model-ECKF and ANN Controller  

Microsoft Academic Search

This paper presents a speed sensorless vector control of an induction motor using an extended complex Kalman filter, a neural network, a spiral vector model and two sensors for tracking voltage and current of one phase of stator. The spiral vector model uses the spiral vector variables rotating counter clockwise in the complex plane. This model depends only on variables

M. Menaa; O. Touhami; R. Ibtiouen; M. Fadel

2007-01-01

181

Comparison of rotor flux and reactive power based MRAS rotor resistance estimators for Vector Controlled Induction Motor drive  

Microsoft Academic Search

In this paper, a detailed study of the performance of rotor flux and reactive power based MRAS rotor resistance estimators for Vector Controlled Induction Motor drive is presented. The rotor resistance changes significantly during operation of the drive due to temperature rise and saturation. This variation has a major influence on the performance of the field oriented control of induction

M. Nandhini Gayathri; S. Himavathi; R. Sankaran

2012-01-01

182

Evaluation and reduction of harmonic distortion caused by solid state voltage controllers of induction motors  

SciTech Connect

The harmonic distortion caused by a solid state AC voltage controller of an induction motor drive is evaluated. A conventional shunt harmonic filter (SHF) for harmonic reduction for a group of such drives is compared with a harmonic blocking compensator (HBC). It is shown that the HBC is more efficient in harmonic reduction than the SHF, especially, with distorted supply voltage. Moreover, the designer has more control over the HBC than the SHF performance. The HBC, however, has a higher power rating than the SHF.

Czarnecki, L.S.; Tan, O.T. (Louisiana State Univ., Baton Rouge, LA (United States))

1994-09-01

183

Speed sensorless field oriented control of induction motor with rotor resistance adaptation  

Microsoft Academic Search

The authors present a method for estimating simultaneously the motor speed and the rotor resistance of an induction motor by superimposing AC components on the field current command. In addition, a rotor resistance adaptive scheme is proposed in order to decouple the rotor resistance adaptation with the motor speed variation. The validity of the proposed method has been verified by

Hisao Kubota; Kouki Matsuse

1993-01-01

184

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

SciTech Connect

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.

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

185

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

SciTech Connect

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.

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

186

Fundamental characteristics of molten metal flow control by linear induction motor  

SciTech Connect

The steel making plant needs a new revolutionary process technology to make low cost and high quality steel. Electromagnetic force is expected to be one of the most hopeful ones because of its non-contact operation, quick response and high controllability. Also, molten metal flow control is one of the important technologies in the steel making plant, used in carrying the molten pig iron, refining process and so on. Molten metal flow control using linear induction motor is expected to be a new revolutionary basic technology to realize high quality and low cost processes. The authors report an experiment with fused metal (melting point: 45C) and 100kg molten steel. According to the fused metal experiment, the linear induction motor has a good ability for stopping and acceleration as well as braking of metal flow. However, the electromagnetic force to be able to stop the metal flow in vertical arrangement is several times larger than the one in horizontal arrangement because of the liquid metal effect. A resonance condenser is useful to reduce the required power source capacity. Therefore, to control the molten metal flow, voltage (current) regulation is superior to frequency regulation. Though the large air gap also makes the electromagnetic force reduced, a conductive shorting bar (Z[sub r]B[sub 2]), installed inside the non-conductive firebrick, increases the electromagnetic force.

Fujisaki, Keisuke (Nippon Steel Corp., Chiba (Japan)); Nakagawa, Junichi; Misumi, Hideyuki (Nippon Steel Corp., Ohita (Japan))

1994-11-01

187

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

Microsoft Academic Search

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

D. G. Holmes; A. Kotsopoulos

1993-01-01

188

Inductance and Active Phase Vector Based Torque Control for Switched Reluctance Motor Drives.  

NASA Astrophysics Data System (ADS)

The Switched Reluctance Motor (SRM) drive technology has developed significantly over the last few years. The simplicity in both motor design and power converter requirement along with the availability of high frequency, high power semiconductor switches have made SRMs compete with conventional adjustable speed drive technologies. The subject of winding current control in switched reluctance machines has always been associated with the shaft position information. The use of inductance for direct commutation control is the central subject of this dissertation. In contrast to the conventional methods based on position commutation, new methods of control based on inductance commutation are presented. The object of a commutation algorithm is to switch the currents in the phase coils, in order to provide continuous energy conversion with maximum torque output for a given unit of input current. Since torque production in a SRM is based on the concept of variable reluctance, it makes more sense to observe the instantaneous phase inductance or reluctance instead of estimating the rotor position. The inductance sensors observe the machine parameters and provide sufficient information on the electrical characteristics of the coils. This control strategy avoids the inductance to position transformation blocks conventionally used in SRM control systems. In a typical SRM, the phase coils have a nonlinear behavior of inductance due to effects of current saturation. Also the parameters of one phase coil differ from those of the other due to manufacturing tolerances or due to bearing wear. In such cases, the algorithms written during the stage of manufacturing may not be valid after parameter changes. Optimizing torque production in the event of phase asymmetry and saturation is developed in this research. Indirect sensors connected to the active phase coil of the SRM are based on sensing the flux level in the active coil. New commutation algorithms based on flux sensing concepts are derived and commutation based on observable phase coil parameters are developed. The commutation methods are based on a composite vector of the observable parameters of the active phase coil. These methods work on a tabular approach which is ideal for implementation using digital computers.

Kalpathi, Ramani Raman

189

Performance Analysis of a Fuzzy Logic Based Rotor Resistance Estimator of an Indirect Vector Controlled Induction Motor Drive  

Microsoft Academic Search

This paper presents a simple method for estimating rotor resistance in an indirect vector-controlled induction motor drive. This is important in vector control, if high-performance torque control is needed. For this purpose, a rotor resistance estimator using fuzzy logic technique is used and analysis, design, and digital simulations are carried out to demonstrate the eectiveness of the proposed estimator.

Y. MILOUD; A. DRAOU

2005-01-01

190

Fault analysis of induction motor  

Microsoft Academic Search

A method for the fault diagnosis of a broken rotor bar in induction motor is presented. The method is based on the analysis of the magnetic flux of three-phase Induction motor. The purpose of this paper is the analysis of the inverter fed induction machine with broken rotor for diagnostic purposes. The features of magnetic flux of healthy conditions of

I. Kathir; S. Balakrishnan; R. J. Bevila

2011-01-01

191

Minimizing Induction Motor Losses by Excitation Control in Variable Frequency Drives  

Microsoft Academic Search

For a given induction motor under a specified load condition, a combination of stator voltage and frequency exists which results in minimum power losses. This optimal operating point is calculated over the complete speed and torque range using a model of the induction machine including saturation, stray losses, and skin effect. It is shown that substantial power savings can be

Daniel S. Kirschen; Donald W. Novotny; Warin Suwanwisoot

1984-01-01

192

A field orientation scheme for current-fed induction motor drives based on the torque angle closed-loop control  

SciTech Connect

In this paper, a field orientation scheme for current-fed induction motor drives is presented. The scheme is based on the closed-loop control of the torque angle and has the merits of being simple in implementation and insensitive to rotor resistance variations. The paper begins by reviewing the limits of existing field orientation schemes. The torque angle control scheme is then formulated, and its application to induction motor (IM) drives fed by either current source inverters or current-controlled PWM inverters is illustrated.

Bassi, E.; Benzi, F.P. (Dept. of Electrical Engineering, Univ. of Pavia, Pavia (Italy)); Bolognani, S. (Dept. of Electric Engineering, Univ. of Padova, Padova (Italy)); Buja, G.S. (Dept. of Electrotechnics, Electronics, and Informatics, Univ. of Trieste, Trieste (Italy))

1992-10-01

193

Electric Vehicle Motors and Controllers.  

National Technical Information Service (NTIS)

Improved and advanced components being developed include electronically commutated permanent magnet motors of both drum and disk configuration, an unconventional brush commutated motor, and ac induction motors and various controllers. Test results on deve...

R. R. Secunde

1981-01-01

194

Electric vehicle motors and controllers  

Microsoft Academic Search

Improved and advanced components being developed include electronically commutated permanent magnet motors of both drum and disk configuration, an unconventional brush commutated motor, and ac induction motors and various controllers. Test results on developmental motors, controllers, and combinations thereof indicate that efficiencies of 90% and higher for individual components, and 80% to 90% for motor\\/controller combinations can be obtained at

R. R. Secunde

1981-01-01

195

Decoupling Control of Secondary Flux and Secondary Current in Induction Motor Drive with Controlled Voltage Source and Its Comparison with Volts\\/Hertz Control  

Microsoft Academic Search

A concept of decoupling control in the strategy of the speed regulation of the squirrel cage induction motor with controlled voltage source is represented. The decoupling control intends to cancel out the cross terms between the secondary flux and the secondary current. Three necessary and sufficient conditions for the decoupling control are offered that correspond to taking into account the

Kouhei Ohnishi; Hideo Suzuki; Kunio Miyachi; Masayuki Terashima

1985-01-01

196

DSP-based speed adaptive flux observer of induction motor  

Microsoft Academic Search

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

Hisao Kubota; Kouki Matsuse; Takayoshi Nakano

1991-01-01

197

Motor Constants Measurement for Induction Motors without Rotating  

NASA Astrophysics Data System (ADS)

In the induction motor drive using sensorless control or vector control, the control calculation is performed based on motor constants. Motor constants are obtained by no load test and lock test. However no load test and lock test are inapplicable to the induction motors joined to machines. This paper suggests the novel method of motor constants measurement without rotating for induction motors. The feature of this novel method is measuring only imaginary part of equivalent impedance of T type equivalent circuit of the induction motor on stop state by supplying the low frequency alternating voltage when measuring mutual inductance and rotor resistance. The reason is because the measured value of the real part of equivalent impedance is not exact because of the error of stator resistance and the voltage error which the dead time causes. It was confirmed by the experiment that this novel method enables to set control parameters correctly and to drive stably induction motors joined to machines with speed sensorless vector control.

Kobayashi, Takahiko; Kimpara, Yoshihiko; Fukuta, Masahiro; Ohnuma, Takumi

198

Adaptive Output Feedback Control of Current-Fed Induction Motors with Uncertain Rotor Resistance and Load Torque  

Microsoft Academic Search

We present an adaptive nonlinear control algorithm for current-fed induction motors which is adaptive with respect to both load torque and rotor resistance. The eighth-order adaptive controller provides reference signals for stator currents on the basis of: measurements of rotor speed, stator currents and stator voltages; estimates of rotor fluxes, which are the unmeasured state variables; estimates of torque load

RICCARDO MARINO; SERGEI PERESADA; PATRIZIO TOMEI

1998-01-01

199

PI and fuzzy estimators for on-line tracking of rotor resistance of indirect vector controlled induction motor drive  

Microsoft Academic Search

This paper presents two methods of estimation of the rotor resistance in the indirect vector controlled induction motor drive. A model reference adaptive scheme is proposed in which the adaptation mechanism is executed using a PI controller and a fuzzy logic. The performance of both estimators and torque and flux responses of the drive are investigated with simulations for variations

B. Karanayil; M. F. Rahman; C. Grantham

2001-01-01

200

A new approach to direct torque control of induction motor drives for constant inverter switching frequency and torque ripple reduction  

Microsoft Academic Search

In this paper, a new approach to the direct torque control (DTC) of induction motor drives is presented. In comparison with the conventional DTC methods, the inverter switching frequency is constant and is dramatically increased, requiring neither any increase of the sampling frequency, nor any high frequency dither signal. The well-developed space vector modulation technique is applied to inverter control

Yen-Shin Lai; Jian-Ho Chen

2001-01-01

201

The optimal torque and efficiency control for the induction motor supplied with the current source inverter considering saturation  

Microsoft Academic Search

A novel method is proposed for dealing with the problems of saturation. The saturation characteristics of the main magnetic circuit are expressed in a simple analytical form so that plotting out the torque-speed curve by calculation becomes possible for an induction motor fed by a current source inverter. Both the maximum torque control and the maximum efficiency control, considering core

Zhou Mingbao; Qu Wenlong

1989-01-01

202

On the energy optimized control of standard and high-efficiency induction motors in CT and HVAC applications  

SciTech Connect

This paper contains an analysis of how the choice of energy optimal control of induction motors is influenced by motor construction, constant torque (CT) and heating, ventilation, and air conditioning (HVAC) (interpreted as vector and scalar motor drives). The analysis is made with a 2.2-kW voltage-source-inverter-fed squirrel-cage motor drive as an example throughout the paper, but through statistics on the use of motors and their efficiencies, the conclusions are widened to a broader range (0--50 kW). Energy optimal control strategies are reviewed and cos({phi}) control, a model-based control, and a search control are implemented in the laboratory in a vector and a scalar motor drive. The convergence speed for the strategies and their ability to reject disturbances are investigated by experiments. It is also shown experimentally that, for both standard and high-efficiency motors, motor energy-efficiency improvement is achievable by energy optimal control below 60% load torque. The energy savings using energy optimal control strategies are measured on a pump system with a certain load cycle. Model-based control is recommended for CT applications and cos({phi}) control for HVAC applications.

Abrahamsen, F.; Blaabjerg, F.; Pedersen, J.K. [Aalborg Univ. (Denmark). Inst. of Energy Technology; Grabowski, P.Z. [Warsaw Univ. of Technology (Poland). Inst. of Control and Industrial Electronics; Thoegersen, P. [Danfoss Drives A/S, Graasten (Denmark). Transmission Div.

1998-07-01

203

Variable speed controller with improved efficiency of energy transfer for an ac induction motor  

SciTech Connect

A variable speed controller for an alternating current induction motor reestablishes the start time for firing pulses and clock pulses in a circuit having a uniform frequency generator generating firing and clock pulses. Feedback from the stator terminals sets an oscillator with a sawtooth type ramp output. Subsequent feedback from the stator terminals are compared with the output of the oscillator in a comparator that establishes a time or phase shift in the generated output having the same frequency, for resetting the firing pulses so that the frequency of current to the stator winding is a function of the relationship between the stator and rotor positions, and of the current amplitude in the stator windings. Adjustment of the circuit parameters reduces the difference between the rotor and stator positions and optimizes stator current to maintain flux balance.

Jackson, R.D.

1982-12-28

204

Modeling and simulation of soft sensor design for real-time speed estimation, measurement and control of induction motor.  

PubMed

This paper deals with the design of a speed soft sensor for induction motor. The sensor is based on the physical model of the motor. Because the validation step highlight the fact that the sensor cannot be validated for all the operating points, the model is modified in order to obtain a fully validated sensor in the whole speed range. An original feature of the proposed approach is that the modified model is derived from stability analysis using automatic control theory. PMID:23332587

Etien, Erik

2013-01-17

205

Efficiency optimization control of AC induction motors: Initial laboratory results. Final report, January 1992-September 1994  

SciTech Connect

A fuzzy logic, energy optimizing controller has been developed to improve the efficiency of motor/drive combinations which operate at varying load and speed conditions. The energy optimizer is complemented by a sensorless speed controller which maintains motor shaft revolutions per minute (RPM) to produce constant output power. Efficiency gains of from 1 to 20% are obtained from laboratory demonstration with commercial motors and drives. Motor shaft RPM is controlled to within 0.5%. The energy optimizing controller used for vector control adjustable speed drives is complemented by a torque pulsation control scheme to rapidly damp vibrations.

Turner, M.W.; McCormick, V.E.; Cleland, J.G.

1996-02-01

206

A transputer-based adaptive speed controller for AC induction motor drives with load torque estimation  

SciTech Connect

In this paper, the authors design and implement an adaptive speed controller that can estimate load torque for ac induction motor drives employing a transputer-based parallel processing technique. The adaptive speed controller, which precedes the field-oriented control loop, consists of a two-degree-of-freedom controller and a feedforward load-torque compensator. The two-degree-of-freedom controller is designed by a pole-placement technique with polynomial manipulations. Its parameters are adjusted adaptively in terms of estimated model parameters. Estimating the model parameters entails a second-order least-squares estimator with constant trace to avoid estimator windup. The design of the feedforward compensator is based on an estimated load-torque model. Estimating the load torque entails a first-order least-squares estimator with variable forgetting factor and covariance resetting, the purposes of which are to detect any slow or sudden changes of torque disturbance, respectively. The resulting adaptive controller is implemented in parallel by IMS T800-20 transputers. Experimental results demonstrate the robustness of the proposed control method in contending with varying load and torque disturbance.

Tsai, M.F.; Tzou, Y.Y. [National Chiao Tung Univ., Hsinchu (Taiwan, Province of China)

1997-03-01

207

A new closed loop speed control of induction motor fed by a high performance Z-source inverter  

Microsoft Academic Search

This paper proposes a new closed loop speed control of an induction motor fed by a high performance Z-source inverter (ZSI), the speed control is based on V\\/F control and indirect field-oriented control (IFOC) strategies. The indirect field-oriented control based on PWM voltage modulation with voltage decoupling compensation is used to insert the shoot-through state within the switching signals. A

Omar Ellabban; Joeri Van Mierlo; Philippe Lataire

2010-01-01

208

Direct torque controlled space vector modulated induction motor fed by a Z-source inverter for electric vehicles  

Microsoft Academic Search

This paper proposes a new closed loop speed control of an induction motor fed by a high performance Z-source inverter (ZSI), the speed control is based on direct torque control space vector modulation (DTC-SVM) control strategy. The modified space vector modulation (MSVM) is used to insert the shoot-through state within the switching signals for the ZSI. A dual loop controller

Omar Ellabban; Joeri Van Mierlo; Philippe Lataire

2011-01-01

209

Fuzzy virtual reference model sensorless tracking control for linear induction motors.  

PubMed

This paper introduces a fuzzy virtual reference model (FVRM) synthesis method for linear induction motor (LIM) speed sensorless tracking control. First, we represent the LIM as a Takagi-Sugeno fuzzy model. Second, we estimate the immeasurable mover speed and secondary flux by a fuzzy observer. Third, to convert the speed tracking control into a stabilization problem, we define the internal desired states for state tracking via an FVRM. Finally, by solving a set of linear matrix inequalities (LMIs), we obtain the observer gains and the control gains where exponential convergence is guaranteed. The contributions of the approach in this paper are threefold: 1) simplified approach--speed tracking problem converted into stabilization problem; 2) omit need of actual reference model--FVRM generates internal desired states; and 3) unification of controller and observer design--control objectives are formulated into an LMI problem where powerful numerical toolboxes solve controller and observer gains. Finally, experiments are carried out to verify the theoretical results and show satisfactory performance both in transient response and robustness. PMID:23076069

Hung, Cheng-Yao; Liu, Peter; Lian, Kuang-Yow

2012-10-12

210

Multi-speed control of single-phase induction motors for blower applications  

SciTech Connect

A simple electronic scheme is studied for multi-speed operation of a permanent split capacitor single phase induction motor used to run fractional horsepower blowers and pumps. Computer simulations predict efficiency, harmonic distortion, and pulsating torque when the motor is fed at 60 Hz, 40 Hz or 30 Hz by means o a four-triac bridge circuit. Results of simulations and laboratory tests are compared, showing close agreement. This scheme may be a cost effective alternative to tapped-winding or pole-changing motors.

Julian, A.L. (Univ. of Wisconsin, Madison, WI (United States). Wisconsin Electric Machines and Power Electronics Consortium); Wallace, R.S.; Sood, P.K. (Emerson Motor Co./MTC, St. Louis, MO (United States))

1995-01-01

211

An improved rotor resistance identification for bearingless induction motors  

Microsoft Academic Search

Bearingless induction motors have combined characteristics of an induction motor and magnetic bearings. Bearingless induction motors tend to suffer from the influence of rotor resistance variation under field-oriented control. Several rotor resistance identification methods have been proposed in the literature. In this paper, a novel rotor resistance identification technique based on variables in the magnetic suspension control loop is proposed.

Daigo Akamatsu; Akira Chiba; Tadashi Fukao; M. A. Rahman

2005-01-01

212

Real-Time Speed and Flux Adaptive Control of Induction Motors Using Unknown Time-Varying Rotor Resistance and Load Torque  

Microsoft Academic Search

In this paper, an algorithm for direct speed and flux adaptive control of induction motors using unknown time-varying rotor resistance and load torque is described and validated with experimental results. This method is based on the variable structure theories and is potentially useful for adjusting online the induction motor controller unknown parameters (load torque and rotor resistance). The presented nonlinear

G. Kenne; Tarek Ahmed-Ali; Francoise Lamnabhi-Lagarrigue; A. Arzande

2009-01-01

213

Using an Artificial Neural Network as a Rotor Resistance Estimator in the Indirect Vector Control of an Induction Motor  

Microsoft Academic Search

This paper presents a rotor resistance estimator based on an artificial neural network (ANN) used in the indirect vector control (IVC) of an induction motor (IM). Attention is focused on the dynamic performance of ANN rotor estimator, which gives superior performance over the fuzzy logic based rotor estimator reported in technical literature. The simulation was done using a 1.5 HP

Huerta Gonzalez; Rodriguez Rivas; Torres Rodriguez

2008-01-01

214

Online Stator and Rotor Resistance Estimation Scheme Using Artificial Neural Networks for Vector Controlled Speed Sensorless Induction Motor Drive  

Microsoft Academic Search

This paper presents a new method of online estimation for the stator and rotor resistances of the induction motor for speed sensorless indirect vector controlled drives, using artificial neural networks. The error between the rotor flux linkages based on a neural network model and a voltage model is back propagated to adjust the weights of the neural network model for

Baburaj Karanayil; Muhammed Fazlur Rahman; Colin Grantham

2007-01-01

215

A Controllable Test Bed to Assess Induction Motor Thermal Behavior under Time-varying Voltage Waveform Distortions  

Microsoft Academic Search

Analytical as well as experimental studies of the effects of waveform distortions on electrical appliances are important in power quality studies. A test bed for assessing the thermal behavior of induction motors is proposed in the paper. The test bed provides a flexible and controllable source of waveform distortions. The preliminary experimental results show the stability and accuracy of the

J. Xu; S. Suryanarayanan; M. Steurer

2007-01-01

216

A comparison of SPSA method and compact genetic algorithm for the optimization of induction motor position control  

Microsoft Academic Search

This paper describes the implementation of self-optimizing embedded control schemes for induction motor drives. The online design problem is formulated as a search problem and solved with stochastic optimization algorithms. The objective function takes into account the tracking error, and is directly measured on the hardware bench. In particular, we compare two efficient optimization algorithms, a simultaneous perturbation stochastic approximation

F. Cupertino; E. Mininno; D. Naso; L. Salvatore

2007-01-01

217

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

Microsoft Academic Search

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.

Joachim Holtz; Juntao Quan

2002-01-01

218

Optimal Efficiency Control of Linear Induction Motor Drive for Linear Metro  

Microsoft Academic Search

In this paper, a new approach is proposed that minimizes the total copper and iron losses in variable speed and\\/or thrust force linear induction motor (LIM) drive. This method is based on a LIM model that considering the end effect and attraction force. For a given speed and load this model allows the establishment of equations to quantify copper and

Jianqiang Liu; Fei Lin; Zhongping Yang; T. Q. Zheng

2007-01-01

219

A Pulsewidth Modulated Control of Induction Motor Drive Using Multilevel 12-Sided Polygonal Voltage Space Vectors  

Microsoft Academic Search

In this paper, a novel 12-sided polygonal space vector structure is proposed for an induction motor drive. The space vector pattern presented in this paper consists of two 12-sided concentric polygons with the outer polygon having a radius double the inner one. As compared to previously reported 12-sided polygonal space vector structures, this paper subdivides the space vector plane into

Anandarup Das; K. Sivakumar; Rijil Ramchand; Chintan Patel; K. Gopakumar

2009-01-01

220

Design and stability study of an induction motor vector control system with extended rotor-flux and rotor-resistance Gopinath observer  

Microsoft Academic Search

The paper presents the synthesis of an extended Gopinath observer (EGO) and analyzes the asymptotic stability of a vector control system for a squirrel-cage induction motor that contains in its loop an EGO. The extended Gopinath observer proposed in this paper is designated to estimate the rotor flux components and the rotor resistance of the induction motor. This work presents

O. Stoicuta; T. C. Pana

2009-01-01

221

Speed sensorless stator flux oriented control of three-level inverter-fed induction motor drive based on fuzzy logic and sliding mode control  

Microsoft Academic Search

A novel simplified stator flux oriented control (SFOC) for three-level inverter-fed induction motor drive is proposed to achieve high performance torque control in both steady state and transient conditions. Sliding mode control (SMC) is designed, in stead of conventional PI controller, to obtain the continuous commanding voltage vectors. The speed accuracy and dynamic tracking performance, as well as robustness to

Yongchang Zhang; Jianguo Zhu; Wei Xu; Jiefeng Hu; David G. Dorrell; Zhengming Zhao

2010-01-01

222

Robust Rotor Flux and Speed Control of Induction Motors Using On-Line Time-Varying Rotor Resistance Adaptation  

Microsoft Academic Search

A novel scheme is proposed for direct speed and flux control of induction motors using on-line estimation of the rotor resistance. The stator current\\/voltage and the rotor mechanical angular speed are assumed to be measured. The design is based on the variable structure theories. The overall controller combined with on-line rotor resistance adaptation is implemented by using rotor flux and

Godpromesse Kenne; T. Ahmed-Ali; H. Nkwawo; F. Lamnabhi-Lagarrigue

2005-01-01

223

Development and Experimental Validation of Resolution-Level Controlled Wavelet-Modulated Inverters for Three-Phase Induction Motor Drives  

Microsoft Academic Search

This paper presents the development, implementa- tion, and performances of a resolution-level vector controller (RLVC) for three-phase induction motor (IM) drive systems. The RLVC is structured to adjust the output voltages of a three-phase voltage-source wavelet-modulated inverter which is used to supply a three-phase IM. The objectives of the RLVC are established by controlling the quadrature axis component of the

S. A. Saleh; M. Azizur Rahman

2011-01-01

224

Development and Experimental Testing of a 3o Resolution-Level Controlled WM Inverter-Fed Induction Motor  

Microsoft Academic Search

This paper presents a novel speed control approach for inverter-fed three-phase (3Phi) induction motors. The proposed approach is called the resolution-level controller (RLC) that is realized for the 3Phi voltage-source (VS) wavelet-modulated (WM) inverters. The wavelet modulation technique generates switching pulses using a non-dyadic type multiresolution analysis (MRA) that is constructed by three scale-based linearly-combined scaling functions shifted by 2pi\\/3

S. A. Saleh; M. A. Rahman

2007-01-01

225

Novel Re-adhesion Control of Single-Inverter Multiple-Induction-Motors Drives for the Rolling Stock Traction System  

NASA Astrophysics Data System (ADS)

In the field of the rolling stock traction system, it is demanded to suppress the slip-slide phenomenon between wheels and rails for the purpose of providing passengers comfortable ride feelings and keeping the train time schedule even in rainy days. One solution for this demand is to adopt both the re-adhesion control and the vector control. Considering this situation, we have already developed a high performance motor drive method for the rolling stock traction system, in which a single inverter drives multiple induction motors by adopting a novel stator-flux-oriented vector control. In this paper, we propose a novel re-adhesion control method for the single-inverter multiple-induction-motors drive system. The proposed method is investigated through simulations, in which the unbalanced condition of the motor load and speed caused by the differences of the wheel diameters are taken into account. Then the experimental results are brought about, which are obtained from a miniature experimental equipment capable of simulating the real rolling stock traction system in terms of the wheel diameter differences and the adhesion between the wheels and rails.

Matsumoto, Yasushi; Eguchi, Naoya; Kawamura, Atsuo

226

Motor protecting improved energy economizer for induction motors  

SciTech Connect

A standard, unmodified AC induction motor has its stator winding energized from a sine wave source through a signal-responsive wave modifier operative to control the portion of each cycle of the sine wave which is coupled from said source to the stator winding. An improved motor current demodulator, responsive to efficiency-related parameters and excessive stator winding inrush current each time said current increases from zero, produces signals for controlling the wave modifier, thereby to maintain optimum motor efficiency with varying motor loads and power source variations, and the signals also control a motor protector circuit which inhibits said wave modifier thereby to deenergize said stator winding under excessive input current conditions, excessive motor temperature or a potentially damaging combination thereof.

Hedges, R.W.

1983-11-08

227

Load effects of Nola-type induction motor power-factor controllers on fuel-cell inverters  

SciTech Connect

This report covers tests performed on power inverters using Nola-type power factor controllers (PFC) and fractional horsepower single-phase induction motors as loading devices. The inverters were designed for integral operation with fuel cell power plants and represented four differential developmental designs ranging in power ratings from 1.5 kW to 5 kW. In addition, a 1000 VA commercial aircraft-type inverter was also tested. Results are presented and discussed.

Not Available

1982-12-31

228

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

Microsoft Academic Search

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

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

2002-01-01

229

FPGA based Space Vector PWM Control IC for Three Phase Induction Motor Drive  

Microsoft Academic Search

In conventional digital motor controllers, the PWM gating signal generation, current control loop for stator current regulation, dead time generation and other computational tasks requires high sampling rate to achieve wide bandwidth performance. To relieve the controller from the time consuming computational task of PWM signal generation, a novel method of Space Vector PWM signal generation is implemented in FPGA

R. K. PongiannanI; N. Yadaiah

2006-01-01

230

Model Reference Adaptive Controller-Based Rotor Resistance and Speed Estimation Techniques for Vector Controlled Induction Motor Drive Utilizing Reactive Power  

Microsoft Academic Search

In this paper, a detailed study on the model reference adaptive controller (MRAC) utilizing the reactive power is presented for the online estimation of rotor resistance to maintain proper flux orientation in an indirect vector controlled induction motor drive. Selection of reactive power as the functional candidate in the MRAC automatically makes the system immune to the variation of stator

Suman Maiti; Chandan Chakraborty; Yoichi Hori; Minh C. Ta

2008-01-01

231

A practical implementation of a linear induction motor drive using new generation DSP controller  

Microsoft Academic Search

The concept of plug and play has become increasingly popular in consumer electronics because of the ease of use and low maintenance, it now appears possible to apply this concept to motor drive design. New generations of DSP controllers, such as the Texas Instruments TMS320C240 (`C240) DSP controller, by integrating the high performance of a DSP core and the powerful

Mi Ching Tsai; Jeng Hu Chen

1999-01-01

232

Sensorless vector control of induction motor compensating the variation of rotor resistance  

Microsoft Academic Search

The authors describe a compensation method for the rotor resistance variation of induction machines in a speed sensorless vector control system using an MRAS (model reference adaptive system). In the case of rotor resistance variation, an analysis of the conventional speed sensorless vector control system using an MRAS is presented. and a compensation method for rotor resistance variation using fuzzy

Taeck-Kie Lee; Soon-Bong Cho; Dong-Seok Hyun

1992-01-01

233

Adaptive partial feedback linearization of induction motors  

Microsoft Academic Search

A nonlinear adaptive state feedback input-output linearizing control is designed for a fifth-order model of an induction motor which includes both electrical and mechanical dynamics under the assumptions of linear magnetic circuits. The control algorithm contains a nonlinear identification scheme which asymptotically tracks the true values of the load torque and rotor resistance, which are assumed to be constant but

RICCARDO MARINO; SERGEI PERESADA; PAOLO VALIGI

1990-01-01

234

Induction motor control using genetic algorithms and graphic-analytical methods  

Microsoft Academic Search

The purpose of this paper is to show the effectiveness of the graphic-analytical methods used in electrical motor control, especially in vector control systems. The graphic-analytical methods used along with the other methods, like Strejc's method, logarithmic method, integration method, present very good results if the PI controllers are replaced with transfer-function-based ones. It is important to mention that good

M. I. Toderici; Simona N. Toderici; Maria Imecs

2010-01-01

235

Segmented rail linear induction motor  

DOEpatents

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces. 6 figs.

Cowan, M. Jr.; Marder, B.M.

1996-09-03

236

Segmented rail linear induction motor  

DOEpatents

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

Cowan, Jr., Maynard (1107 Stagecoach Rd. SE., Albuquerque, NM 87123); Marder, Barry M. (1412 Pinnacle View Dr. NE., Albuquerque, NM 87123)

1996-01-01

237

Sensorless vector-controlled induction motor drive system with rotor resistance estimation using parallel processing with floating point DSP  

Microsoft Academic Search

The paper deals with the aspects related to simultaneous rotor speed estimation and rotor resistance identification in field-oriented induction motor systems using only the induction motor model. A statistical based computing algorithm is proposed in order to avoid the division by zero. Three basic algorithms have been considered in order to establish the optimum solution. The study of the speed

Teodor Pana

1997-01-01

238

Model based speed and rotor resistance estimation for sensorless vector-controlled induction motor drives using floating point DSP  

Microsoft Academic Search

The paper deals with the aspects related to simultaneous rotor speed estimation and rotor resistance identification in field-oriented induction motor systems using only the induction motor model. A statistical based computing algorithm is proposed in order to avoid the division by zero. Three basic algorithms have been considered in order to establish the optimum solution. The study of the speed

Teodor Pana

1996-01-01

239

Energy economizer for polyphase induction motors  

SciTech Connect

A standard three phase induction motor starts with all three of its input connections connected to the three phase power line. Two of these connections are through triacs which remain continously conducting below said motor's particular most energyefficient speed, which is above about 95% of synchronous speed. This assures full starting torque and undiminished overload handling capability. The triacs, in response to a control signal, may open the circuits over a sufficiently wide portion of the sine wave input voltage to substantially maintain said particular efficient speed under all rated load conditions. To assure smooth operation and maximum energy savings, the two triacs conduct differently at very light motor loads. The dc control voltage which determines the operation of the triacs is generated by a frequency discriminator circuit which receives its information from a load detecting device that is frequency modulated by load/speed related properties inherent to induction motors.

Hedges, R.W.

1980-12-30

240

Induction motor speed drive improvement using fuzzy IP-self-tuning controller. A real time implementation.  

PubMed

An IP-self-tuning controller tuned by a fuzzy adjustor, is proposed to improve induction machine speed control. The interest of such controller is the possibility to adjust only one gain, instead of two gains for the case of the PI-self-tuning controllers commonly used in the literature. This paper presents simulation and experimental results. These latter were obtained by practical implementation on a DSPace 1104 board of three different speed controllers (the classical IP, the fuzzy-like-PI and the IP-self-tuning), for a 1.5KW induction machine. The paper presents different tests used to compare the performances of the proposed controller to the two others in terms of computation time, tracking performances and disturbances rejection. PMID:23317661

Lokriti, Abdesslam; Salhi, Issam; Doubabi, Said; Zidani, Youssef

2013-01-12

241

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

NASA Astrophysics Data System (ADS)

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.

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

242

Sensorless control of induction motors with simultaneous on-line estimation of rotor resistance and speed based on the feedforward torque control scheme  

Microsoft Academic Search

In this paper, a new speed sensorless induction motor scheme which can work at any speed including the zero speed is presented. The proposed method is robust to rotor resistance variations. Simultaneous on-line estimations of speed and rotor resistance are realized based on a feedforward type torque control scheme. The rotor flux with a low frequency sinusoidal waveform is used

S. K. Jeong; Z. G. Lee; H. A. Toliyat; P. Niazi

2003-01-01

243

Sensor-less speed control strategy for induction motor drive incorporating vector controlled scheme PWM inverter-fed with auto-tuning machine parameter estimation  

Microsoft Academic Search

This paper presents a feasible development on a highly accurate quick response adjustable speed drive implementation for general purpose induction motor which operates on the basis of sensorless slip frequency type vector controlled sine-wave PWM inverter with automatic tuning machine parameter estimation schemes. The dynamic speed response performances for largely changed load torque disturbances as well as steady state speed

Koji Soshin; Tarek Ahmed; Mutsuo Nakaoka; Yukihiko Okamura

2003-01-01

244

Design of an advanced non linear controller for induction motors and experimental validation on an industrial benchmark  

NASA Astrophysics Data System (ADS)

This paper mainly deals with the design of an advanced control law for induction motors and its real-time implementation on an experimental test benchmark. First, relationship between the classical field oriented control (FOC) and non linear linearizing control laws is studied. It is shown that both control laws are similar. Classical non linear linearizing control improves the performances but not in a spectacular way when the observer and the controller are designed independently. A new non linear observer based control law is designed, which is shown to be globally stable and is implemented on an experimental test-bench. The control algorithm is studied and applied in many configurations (various set-points, flux and speed profiles and torque disturbances) and is shown to be very efficient.

Lubineau, D.; Dion, J. M.; Dugard, L.; Roye, D.

2000-02-01

245

Implementation of a direct control algorithm for induction motors based on discrete space vector modulation  

Microsoft Academic Search

The basic concept of direct torque control of induction machines is investigated in order to emphasize the effects produced by a given voltage vector on stator flux and torque variations. The low number of voltage vectors which can be applied to the machine using the basic DTC scheme may cause undesired torque and current ripple. An improvement of the drive

Domenico Casadei; Giovanni Serra; K. Tani

2000-01-01

246

Robust fuzzy sliding mode observer for sensorless field oriented control of induction motor  

Microsoft Academic Search

This paper deals with the sensorless field oriented control based on Takagi Sugeno (TS) observer. In the proposed algorithm, we present a nonlinear induction machine by Takagi-Sugeno (T-S) fuzzy model which is valid in large speed domain instead of linearized model around equilibrium point. In addition we design sliding mode observer known for its robustness against parametric uncertainties and external

Kais Jamoussi; Mohammed Chadli; Ahmed El Hajjaji; M. Ouali

2009-01-01

247

Zero speed sensorless control signals of induction motors with closed rotor slots  

Microsoft Academic Search

Realising control of standard induction machines at low and zero speed without mechanical sensors implies the use of parasitic nonfundamental wave effects. Different schemes have been proposed in the past which exploit the inherent saliencies of saturation and\\/or rotor slotting to detect the main flux and the rotor position. They all use a high frequency or transient signal in addition

Thomas M. Wolbank; Reinhard Woehrnschimmel; J. L. Machl

2002-01-01

248

Finite-Element Analysis of Rotor Slotting Saliency in Induction Motors for Sensorless Control  

Microsoft Academic Search

This paper deals with induction machines analysis by finite-element analysis (FEA) for position sensorless control drives based on rotating voltage carrier injection. In details, it focuses the analysis of the supply conditions of the machine, both the high-frequency rotating voltage carrier and the fundamental frequency supply, for the optimal detection of the rotor slotting saliency effects. With this regard, as

Marcello Pucci; Calogero Serporta

2010-01-01

249

All digital space vector PWM induction motor drive based on flux control  

Microsoft Academic Search

One space vector PWM (SVPWM) method based on closed-loop stator flux control is presented. To realize the method, an all digital voltage source inverter motor system is proposed, in which 2 processors are utilized, one is Hitachi's H8\\/532 single chip processor, the other is TI's TMS320E15 DSP. The system's transient and steady state performance are investigated by means of digital

Li Yong; Huang Lipei; Li Fahai

1993-01-01

250

New induction motors: Design and testing  

Microsoft Academic Search

A new method of testing induction motors (phantom loading) and the design and tests of induction motors with novel windings are described. Phantom loading enables a complete heat-run test for two identical induction motors to be carried out by purely electrical means. This is done by feeding dc current into the stator windings of the two machines in such a

H. M. El-Shewy

1973-01-01

251

Artificial neural network based induction motor design  

Microsoft Academic Search

This paper presents an artificial neural network based designing for induction motors. Based on the actual design data for various types of induction motors, three-layered artificial neural networks have been trained to give better solutions for the fundamental quantities and parameters of individual induction motor. After training, selected quantities have been estimated quite accurately from the input data which is

Takashi Hiyama; Masahiro Ikeda; Takaaki Nakayama

2000-01-01

252

Adjustable-speed Unsymmetrical Two-phase Induction Motor Drive for Photovoltaic Powered Air Conditioners  

Microsoft Academic Search

This article proposes a novel application of adjustable-speed one-phase induction motors in air conditioners powered by photovoltaic arrays. Employing the slip-frequency control scheme, an off-the-shelf one-phase induction motor is operated as an unsymmetrical two-phase induction motor. Maintaining certain control conditions, the unsymmetrical two-phase induction motor is made to behave like a symmetrical two-phase induction motor. This has the advantage of

Naser M. B. Abdel-Rahim

2010-01-01

253

Nonlinear Control of the Doubly Fed Induction Motor with Copper Losses Minimization for Electrical Vehicle  

NASA Astrophysics Data System (ADS)

There is an increasing interest in electric vehicles due to environmental concerns. Recent efforts are directed toward developing an improved propulsion system for electric vehicles applications with minimal power losses. This paper deals with the high efficient vector control for the reduction of copper losses of the doubly fed motor. Firstly, the feedback linearization control based on Lyapunov approach is employed to design the underlying controller achieving the double fluxes orientation. The fluxes controllers are designed independently of the speed. The speed controller is designed using the Lyapunov method especially employed to the unknown load torques. The global asymptotic stability of the overall system is theoretically proven. Secondly, a new Torque Copper Losses Factor is proposed to deal with the problem of the machine copper losses. Its main function is to optimize the torque in keeping the machine saturation at an acceptable level. This leads to a reduction in machine currents and therefore their accompanied copper losses guaranteeing improved machine efficiency. The simulation results in comparative presentation confirm largely the effectiveness of the proposed DFIM control with a very interesting energy saving contribution.

Drid, S.; Nait-Said, M.-S.; Tadjine, M.; Makouf, A.

2008-06-01

254

Stator fault modeling in induction motors  

Microsoft Academic Search

In this paper a model of an induction motor affected by stator faults is presented. Two different types of faults are considered, these are; disconnection of a supply phase, and inter-turn and turn-turn short circuits inside the stator. The output of the derived model is compared to real measurements from a specially designed induction motor. With this motor it is

Jesper S. Thomsen; C. S. Kallesoe

2006-01-01

255

Mathematical Models for the Linear Induction Motor.  

National Technical Information Service (NTIS)

Several mathematical models concerning the design of linear induction motors with low to zero speed applications, clamping devices, shortstroke servo actuators, conveyorbelt drives and capsule transport systems are discussed. The effect of typical motor d...

D. J. Degroot

1988-01-01

256

Type-1 and Type-2 Fuzzy Logic and Sliding-Mode Based Speed Control of Direct Torque and Flux Control Induction Motor Drives - A Comparative Study  

NASA Astrophysics Data System (ADS)

In this research study, the performance of direct torque and flux control induction motor drive (IMD) is presented using five different speed control techniques. The performance of IMD mainly depends on the design of speed controller. The PI speed controller requires precise mathematical model, continuous and appropriate gain values. Therefore, adaptive control based speed controller is desirable to achieve high-performance drive. The sliding-mode speed controller (SMSC) is developed to achieve continuous control of motor speed and torque. Furthermore, the type-1 fuzzy logic speed controller (T1FLSC), type-1 fuzzy SMSC and a new type-2 fuzzy logic speed controller are designed to obtain high performance, dynamic tracking behaviour, speed accuracy and also robustness to parameter variations. The performance of each control technique has been tested for its robustness to parameter uncertainties and load disturbances. The detailed comparison of different control schemes are carried out in a MATALB/Simulink environment at different speed operating conditions, such as, forward and reversal motoring under no-load, load and sudden change in speed.

Ramesh, Tejavathu; Panda, A. K.; Kumar, S. Shiva

2013-08-01

257

Variable Speed induction Motor Drives Use Electronic Slip Calculator Based on Motor Voltages and Currents  

Microsoft Academic Search

In certain types of adjustable frequency induction motor drives, optimal control of the motor can be best implemented by using information on the motor slip frequency. Unfortunately, this generally requires the use of an electromechanical speed transducer coupled to the shaft. The presence of this transducer spoils the general characteristics of ruggedness and mechanical simplicity typical of an ac drive.

Alberto Abbondanti; Michael B. Brennen

1975-01-01

258

Automatic three-phase squirrel-cage induction motor test assembly for motor thermal behaviour studies  

Microsoft Academic Search

This paper presents a laboratory assembly to perform, automatically, three-phase squirrel cage induction motor load tests. Besides the motor, mechanical load (fan), drive and electrical protection equipment, the assembly comprises a 12 bits data acquisition system, a software controlled electronic driving system, temperature sensors and a microcomputer. It is useful for fast and reliable motor part temperatures acquisition during any

E. R. Filho; R. R. Riehl; E. Avolio

1994-01-01

259

Pulsed linear induction motors in Maglev applications  

Microsoft Academic Search

Linear induction and synchronous motors have been the favored approaches for achieving linear propulsion in the Maglev community. One alternative is PLIM, a less conventional pulsed linear induction motor. Among the advantages realized through PLIM are elimination of low power factor power transfer, smaller end winding overhang, and simpler electronics. Examined in this document are various embodiments of this approach

K. Davey

2000-01-01

260

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

SciTech Connect

This patent describes a method of generating m pulse width modulated waveforms, each having an average voltage which varies sinusoidally at a first frequency and being applied to a respective phase input of an m-phase AC induction machine. It comprises generating a carrier waveform; selecting a reference point on the carrier waveform and evaluating the function sin {theta} at the center of each pulse of the carrier waveform; modulating the width of each the pulse by moving the leading and trailing edges thereof through equal angular displacements in opposite directions, applying to one the input of the AC induction machines the modulated carrier waveform and applying to the remaining the inputs of the AC induction machine respective waveforms which are identical to the modulated carrier waveform but are shifted in phase with respect thereto by respective angular displacements at the first frequency which are successive integer multiples of 360{degrees} m.

Geppert, S.; Slicker, J.M.

1984-07-03

261

Temperature Field of Multiphase Induction Motors  

Microsoft Academic Search

The paper has analyzed the temperature field of multiphase induction motors stator under one or two phases breaking and rotation frequency decreasing. The motor thermal condition could be analyzed by using modern software. In this case ELCUT soft that allows to simulate thermal field in the motor stator core is used. ELCUT calculations are based on the thermal differential equations.

D. M. Glukhov; O. O. Muravleva

2005-01-01

262

Online Sensorless Induction Motor Temperature Monitoring  

Microsoft Academic Search

A sensorless internal temperature monitoring method for induction motors is proposed in this paper. This method can be embedded in standard motor drives, and is based on the stator windings resistance variation with temperature. A small AC signal is injected to the motor, superimposed to the power supply current, in order to measure the stator resistance online. The proposed method

Maximiliano O. Sonnaillon; Guillermo Bisheimer; Cristian De Angelo; Guillermo O. García

2010-01-01

263

Synchronous Motor Effects in Induction Machines  

Microsoft Academic Search

Many induction motors do not have the smooth speed torque curves which are to be expected from elementary theory. Many motors at no load show a tendency to run at some speed way below that normally expected. This is sometimes called ``sub-synchronous'' speed, or the motor is said to be ``crawling.'' In the present paper one cause of this phenomenon

E. E. Dreese

1930-01-01

264

Sensorless position detection for vector controlled induction motor drives using an asymmetric outer-section cage  

Microsoft Academic Search

This paper describes a new method of obtaining a rotor position signal from a cage induction machine operating without a mechanical sensor. The method is based on introducing a circumferential variation in the resistance of the outer section of either a double cage or deep bar cage rotor. Simulation results for a linear double cage machine show that the method

J. Cilia; G. M. Asher; K. J. Bradley

1996-01-01

265

Physical understanding of multiple saliencies in induction motors and their impact on sensorless control  

Microsoft Academic Search

In the first part of the paper a detailed investigation of the physical reasons for the behaviour of an induction machine excited with high-frequency test signals is presented. The measured impedance curves are heavily influenced by the saturation level of the rotor slot bridges. The saturation phenomena of the closed rotor slots can be divided into mechanical angle-dependent and independent

H. Zatocil

2008-01-01

266

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

NASA Astrophysics Data System (ADS)

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 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.

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

267

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

SciTech Connect

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.

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

1994-05-01

268

On the fuzzy-based force control designs of a induction motor for non-contacting industrial steel plate conveyance system application  

Microsoft Academic Search

To design a stable and fully-controllable process for steel plate conveyance with less noise, feasibilities of incorporating the linear induction motor scheme have been intensively investigated. By implementing appropriate fixed poles on top of the rollers at the run-out-table of a mill, controllable two-dimensional forces can thus be provided to drive the movable steel plate to the desired directions. An

Cheng-Tsung Liu; Yi-Hsuan Chiang; Chiu-Piao Huang; sheng-Yang Lin

2005-01-01

269

An approach for the design of fuzzy sliding adaptive controller in induction motor drives  

Microsoft Academic Search

A robust servo system is presented for the purpose of maintaining a good speed tracking, load regulating responses and unknown disturbance regulating responses. The proposed system, based on a feedforward control theory, consists of fuzzy sliding adaptive controller (FSAC), sliding mode torque observer (SMTO) and parameter controller (PC). FSAC is a sliding mode controller whose structure is continuously changed by

Byung-Do Yoon; Yoon-Ho Kim; Hong-Woo Rhew; Chan-Ki Kim

1996-01-01

270

Control of cell pattern in the neural tube: motor neuron induction by diffusible factors from notochord and floor plate.  

PubMed

The identity of cell types generated along the dorsoventral axis of the neural tube depends on inductive signals that derive from both mesodermal and neural cells. To define the nature of these signals, we have analyzed the differentiation of cells in neural plate explants. Motor neurons and neural crest cells differentiate in vitro from appropriate regions of the neural plate, indicating that the specification of cell fate along the dorsoventral axis of the neural tube begins at the neural plate stage. Motor neuron differentiation can be induced by a diffusible factor that derives initially from the notochord and later from floor plate cells. By contrast, floor plate induction requires contact with the notochord. Thus, the identity and patterning of neural cell types appear to involve distinct contact-mediated and diffusible signals from the notochord and floor plate. PMID:8500163

Yamada, T; Pfaff, S L; Edlund, T; Jessell, T M

1993-05-21

271

Optimal induction motor bearing selection  

Microsoft Academic Search

There is no choice in bearing selection on small motors (less than 200 HP), where only anti-friction bearings are available. Likewise, a choice does not exist on larger motors (motors in excess of 2000 HP), where various design requirements leave only the sleeve bearing (or tilting pad bearing) as a viable option. On the intermediate size motors a choice exists.

W. R. Finley; M. M. Hodowanec

2003-01-01

272

Improving dynamic aggregation of induction motor models  

SciTech Connect

The paper focuses on the problem of aggregating induction motor models into a single unit model aiming to become computationally feasible to describe the dynamic behavior of large electrical systems. A new aggregation method is developed based on usual modeling of induction motors allowing the present simulation computer programs to be kept in operation. The absence of drastic simplifications, the proper handling of motor mechanical load, and an adequate treatment of equivalent inertia constant allow the aggregate model to show very good accuracy. A small example is presented to illustrate the application of the method. Validation test results are also presented including motors at different buses in a real-life industrial system.

Franklin, D.C.; Morelato, A. (Univ. of Campinas (Brazil))

1994-11-01

273

Improved direct torque and flux vector control of PWM inverter-fed induction motor drives  

Microsoft Academic Search

In this paper, a direct torque and stator flux vector control system is presented. The principle of this method was proposed by Takahashi and Noguchi in 1985. In contrast to the field oriented control, no coordinate transformation and current control loop is required. In practical application, however, problems occur with starting and operation in the zero speed region. This paper

Marian P. Kazmierkowski; Andrzej B. Kasprowicz

1995-01-01

274

Induction-motor sensorless vector control with online parameter estimation and overcurrent protection  

Microsoft Academic Search

Sensorless drive control has been widely studied in recent years due to the numerous advantages regarding potential failures of position sensors, especially in applications such as automotive or aerospace. Among vector-control drives, indirect rotor-flux-oriented control (IRFOC) type is one of the most popular and tested options. However, it is still a challenging field since several aspects can be improved, such

Mario J. Durán; José L. Durán; Francisco Pérez; José Fernández

2006-01-01

275

Online training of parallel neural network estimators for control of induction motors  

Microsoft Academic Search

This paper presents an adaptive parallel control architecture, using an artificial neural network (ANN) which is trained while the controller is operating online. The proposed control structure incorporates five-multilayer feedforward ANNs, which are online trained using the Marquardt-Levenberg least-squares learning algorithm. The five networks are used exclusively for system estimation. The estimation mechanism uses online training to learn the unknown

Ahmed Rubaai; Raj Kotaru; M. David Kankam

2001-01-01

276

Neural network based estimation of feedback signals for a vector controlled induction motor drive  

Microsoft Academic Search

Neural networks are showing promise for application in power electronics and motion control systems. So far, they have been applied for a few cases, mainly in the control of converters and drives, but their application in estimation is practically new. The purpose of this paper is to demonstrate that such a technology can be applied for estimation of feedback signals

M. Godoy Simces; Bimal K. Bose

1995-01-01

277

Thermal modelling of small cage induction motors.  

National Technical Information Service (NTIS)

The loadability of electric machines is above all determined by temperature limits. In this work, thermal network models, suitable for totally enclosed fan-cooled (TEFC) induction motors, are used to predict the machine temperatures. Two specific models a...

G. Kylander

1995-01-01

278

Comparison of capabilities of reluctance synchronous motor and induction motor  

NASA Astrophysics Data System (ADS)

This paper compares the capabilities of a reluctance synchronous motor (RSM) with those of an induction motor (IM). An RSM and IM were designed and made, with the same rated power and speed. They differ only in the rotor portion while their stators, housings and cooling systems are identical. The capabilities of both motors in a variable speed drive are evaluated by comparison of the results obtained by magnetically nonlinear models and by measurements.

Štumberger, Gorazd; Hadžiselimovi?, Miralem; Štumberger, Bojan; Miljavec, Damijan; Dolinar, Drago; Zagradišnik, Ivan

2006-09-01

279

Three-phase induction motor design software  

Microsoft Academic Search

The paper presents a program for optimized design or re-design of three-phase induction motors conceived in VISUAL BASIC language. The program structure is modular and can thus be adjusted to the most varied requirements of induction motor design. For its users, the program offers several facilities, i.e. a friendly interface, different ways of formulating the optimum problem, an updatable database

Gheorghe Scutaru; Andrei Negoita; Razvan Mihai Ionescu

2010-01-01

280

Hybrid Cascaded H-Bridge Multilevel-Inverter Induction-Motor-Drive Direct Torque Control for Automotive Applications  

Microsoft Academic Search

This paper presents a hybrid cascaded H-bridge multilevel motor drive direct torque control (DTC) scheme for electric vehicles (EVs) or hybrid EVs. The control method is based on DTC operating principles. The stator voltage vector reference is computed from the stator flux and torque errors imposed by the flux and torque controllers. This voltage reference is then generated using a

Farid Khoucha; Soumia Mouna Lagoun; Khoudir Marouani; Abdelaziz Kheloui; Mohamed El Hachemi Benbouzid

2010-01-01

281

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

Microsoft Academic Search

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

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

2006-01-01

282

The history of induction motors in America  

Microsoft Academic Search

This paper briefly reviews the history of the induction motor from its invention by Nicola Tesla in 1888 through the various stages of its development-the invention of the cast aluminum squirrelcage winding, improvements in magnetic steel and insulation, and the progressive reduction of the dimensions for a given horsepower rating, so that today a 100-hp motor has the same mounting

P. L. Alger; R. E. Arnold

1976-01-01

283

A step-down chopper-controlled slip energy recovery induction motor drive  

SciTech Connect

The design of a chopper-controlled slip energy recovery drive (SERIMD), also known as a static Kramer drive, demands an exact knowledge of the steady state and dynamic performance of the system over the complete operating range. To accomplish this, a coupled circuit approach is necessary whereby the self and mutual coupling effects, voltage and current harmonics in the machine and voltage and current ripple at different points in the drive system are duly taken into account. Such a model should enable the accurate prediction of all instantaneous current values which leads to accurate prediction of electric torque and harmonics injected into the supply. This paper presents a model to accomplish the above. Mathematical predictions are verified with detailed experimental results.

Refoufi, L. (Inst. National D'Electricite et D'Electronique, Boumerdes (Algeria)); Pillay, P. (Univ. of New Orleans, LA (United States). Dept. of Electrical Engineering); Harris, M.R. (Univ. of Southampton, England (United Kingdom). Dept. of Electrical Engineering)

1993-09-01

284

Analysis of self excited induction generator feeding induction motor  

SciTech Connect

The paper is motivated to assess the suitability of a self excited induction generator (SEIG) to supply dynamic loads like induction motors. An algorithm is proposed to predict the steady state performance of an SEIG feeding an induction motor (IM). The computed and experimental results are presented for different operating conditions of an SEIG-IM system. A good agreement reached between the predicted and test results validate the effectiveness of the proposed algorithm. Experimentally recorded transients of an SEIG during a series of switching operations are presented to demonstrate the ability of an SEIG to sustain the starting of an IM. By analyzing the performance of a typical 7.5 kW, 3-phase SEIG feeding induction motors of different ratings, useful guidelines are proposed for the design of an SEIG-IM system in autonomous applications like agricultural pumpsets.

Shridhar, L.; Singh, B.; Jha, C.S.; Singh, B.P. (IIT Delhi, New Delhi (India). Dept. of Electrical Engineering)

1994-06-01

285

An extended Kalman filter approach to rotor time constant measurement in PWM induction motor drives  

Microsoft Academic Search

A rotor time constant estimation technique for the purpose of updating the control gains of an induction motor field-oriented controller is described. An extended Kalman filter is employed to estimate the inverse rotor time constant online only using measurements of the stator voltages and currents and rotor speed of an induction motor. The motor is driven by a pulsewidth modulated

Li-Cheng Zai; Christopher L. DeMarco; Thomas A. Lipo

1992-01-01

286

Electric vehicle motors and controllers  

SciTech Connect

The goal of DOE's Electric and Hybrid Vehicle Program is to promote and accelerate the development and public use of vehicles that use electricity as the principal source of propulsion energy. Successful achievement of this goal will ultimately result in significant petroleum savings to the nation. However, the design, performance, and cost of propulsion components must be improved before commercially attractive electric vehicles can be built. Improved and advanced components being developed under the NASA-managed propulsion portion of the DOE program include electronically commutated permanent magnet motors of both drum and disk configurations, an unconventional brush-commutated motor, and ac induction motors and various controllers.

Secunde, R.R.

1981-01-01

287

A Loss-Minimization DTC Scheme for EV Induction Motors  

Microsoft Academic Search

This paper proposes a strategy to minimize the losses of an induction motor propelling an electric vehicle (EV). The proposed control strategy, which is based on a direct flux and torque control scheme, utilizes the stator flux as a control variable, and the flux level is selected in accordance with the torque demand of the EV to achieve the efficiency-optimized

Abdelhakim Haddoun; Mohamed El Hachemi Benbouzid; Demba Diallo; Rachid Abdessemed; Jamel Ghouili; Kamel Srairi

2007-01-01

288

A split-wound induction motor design to improve the reliability of PWM inverter drives  

Microsoft Academic Search

Stator windings have been designed for the three-phase induction motor to protect the PWM inverter bridge against simultaneous-conduction fault currents. Rather than adding inductance in each inverter leg to control fault currents, the design lets the primary leakage inductance of the motor stator windings perform the fault current control function. Appropriate separation of the windings in the stator slots increases

J. C. Salmon; B. W. Williams

1990-01-01

289

Speed control of a PV powered DC motor driving a self-excited 3-phase induction generator for maximum utilization efficiency  

SciTech Connect

Photovoltaic (PV) powered dc motors driving dedicated loads (e.g., water pumps) are increasingly used in the remote rural areas of may developing countries. The key to their success is simplicity (direct coupling, no dc-ac conversion, no storage batteries, etc.). Because of the relatively high cost of the PV array, the system designer is interested in maximizing its utilization efficiency. A PV powered dc motor can also be used to drive a three-phase self-excited induction generator (SEIG). This arrangement is useful as part of an integrated renewable energy system (IRES), which takes advantage of the inherent diversity of wind and solar energy in most developing countries to improve power quality. The SEIG is driven by a wind-turbine, dc motor, or both. Another advantage of this arrangement is its versatile control characteristics through the dc motor control. This paper describes a technique to maximize the utilization efficiency of the PV array by controlling the field current of the dc motor through a dc chopper.

Alghuwainem, S.M. [King Saud Univ., Riyadh (Saudi Arabia). Electrical Engineering Dept.

1996-12-01

290

Application of an extended Kalman filter to rotor speed and resistance estimation in induction motor vector control  

Microsoft Academic Search

The vector control method allows high performance control of torque and speed to be achieved from an induction machine. The decoupling of the flux and the electromagnetic torque, obtained by field orientation, depends on the precision and the accuracy of the estimated states. This paper presents the application of the extended Kalman filter (EKF) to the online estimation of the

M. A. Ouhrouche; S. Lefebvre; X. D. Do

1998-01-01

291

Retrofitting pipelines with induction motors  

SciTech Connect

This paper includes a discussion of design considerations, test, and application of a large stiff-shaft two-pole motor designed for fixed or adjustable-frequency drive (AFD) of pumps for a pipeline retrofit. A rotor-dynamics analysis of the rotor bearing system is presented for the as-built design and for alternate bearing designs. Test data is presented for complete shop tests with the motor and drive system. The project consisted of 22 motors plus two spares rated 3,000 hp at 1.15 service factor and 3,600 r/min at 60 Hz. These motors, rated 4,000 V, are for use at variable speeds and torque from 23.5 to 60 Hz. A second, more recent project consisting of 18 motors and one spare rated 4,000 hp at 1.15 service factor and 3,600 r/min at 60 Hz is also briefly described in the paper. These 4,000-V motors are for use at variable speeds and torque from 24 to 66 Hz.

Finley, W.R.; Holter, W.G. [Siemens Energy and Automation, Inc., Norwood, OH (United States)

1998-09-01

292

A Novel Approach to Induction Motor Transfer Functions  

Microsoft Academic Search

The scope of static ac drives is increasing rapidly, and with this increase has evolved the need to devise control strategies for a variety of new applications. Purely analytical approaches to design of control systems for ac drives are hindered by the highly coupled nature of the ac induction motor equations which, in the past, necessitated lengthy manual derivations of

T.A. Lipo; A. B. Plunkett

1974-01-01

293

Induction-motor field efficiency evaluation using instantaneous phasor method  

SciTech Connect

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.

Hsu, J.S.

1998-08-01

294

Flux observer with online tuning of stator and rotor resistances for induction motors  

Microsoft Academic Search

This paper proposes an adaptive flux observer for induction motors, where stator and rotor resistances are estimated in online environments. The variation of motor parameters during operation degrades the performance of the controller and the flux observer. Among the parameters of induction motors, rotor resistance is a crucial one for flux estimation, and stator resistance also becomes critical in the

Seok Ho Jeon; Kwang Kyo Oh; Jin Young Choi

2002-01-01

295

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

Microsoft Academic Search

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

Mohamed El Hachemi Benbouzid; Michelle Vieira; C. Theys

1999-01-01

296

Real Time Prediction of Temperatures in an Induction Motor Using a Microprocessor  

Microsoft Academic Search

The paper describes a microprocessor based thermal prediction device for induction motors, which has applications in ageing control and motor protection. A lumped parameter linear model is used to describe the dynamic thermal performance of an induction motor. The model is formulated out of purely dimensional information and constant thermal coefficients, to be applicable to any similar machine. The heat

P. H. Mellor; D. R. Turner

1988-01-01

297

Control Methods for Good Dynamic Performance Induction Motor Drives Based on Current and Voltage as Measured Quantities  

Microsoft Academic Search

A family of schemes for the control of torque and speed of the induction machine is described. It has been developed with the intention of closing the gap between high dynamic performance drives, requiring measurement of the rotor position or the field, and the simpler schemes with poor dynamic performance. Dynamic behavior and a static accuracy have been achieved which

Robert Joetten; Gerhard Maeder

1983-01-01

298

A split-wound induction motor design to improve the reliability of PWM inverter drives  

Microsoft Academic Search

Induction-motor stator windings have been designed to protect the PWM (pulsewidth-modulated) inverter bridge against simultaneous-conduction fault currents. Rather than adding series inductance in each inverter leg, to control the fault currents, part of the induction motor's primary leakage inductance performs the fault current control function. An extensive evaluation of this fault current control is given. The effects on the performance

John C. Salmon; B. Williams

1988-01-01

299

Bridge Inductance of Induction Motor with Closed Rotor Slots  

NASA Astrophysics Data System (ADS)

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.

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

300

Linear-Induction-Motor Slide Drive.  

National Technical Information Service (NTIS)

A linear-induction-motor drive system to position machine tool slides has been developed on a test bed that utilizes an air-bearing slide, laser interferometer feedback, and a microprocessor-based servo system. Static and dynamic positioning accuracies of...

W. E. Barkman

1977-01-01

301

Linear Induction Motor Electrical Performance Test.  

National Technical Information Service (NTIS)

This report describes the electrical performance characteristics of a 2500-hp (at 250 mph) linear induction motor (LIM), based on data acquired while propelling the LIM research vehicle over a 0-to-250-mph speed range. Pertinent LIM design information is ...

R. B. Powell

1976-01-01

302

High-Speed Induction Motor Simulation.  

National Technical Information Service (NTIS)

Covers a study on a simulation of a 50-horsepower high-speed induction motor on an analog computer. The investigations described in the report are intended to accomplish several purposes. One purpose is to develop in more detail the simulation equations f...

M. L. Goss

1968-01-01

303

An induction motor parameter estimation method  

Microsoft Academic Search

The auxiliary systems of large thermal power plants are mainly driven by large induction motors. Their accurate modeling is essential for the analysis of black or emergency start procedures during power system restoration, where auxiliaries are started from relatively small diesel, hydro, or gas turbines, and where large voltage and frequency deviations occur. This paper proposes a new parameter estimation

D. Lindenmeyer; H. W. Dommel; A. Moshref; P. Kundur

2001-01-01

304

Linear Induction Motor. Design and Construction  

Microsoft Academic Search

This article summarizes the procedure for the design and construction of a linear induction motor. At the beginning, a theorical support of the functioning principle and the electric model assumed is presented; subsequently, the generalities of the design program made in Matlab are explained and the experimental tests that ratified the design procedure selected as well as the selected model

Facultad Tecnológica; José Roberto Bedoya; Alexander Rodríguez García

305

Induction motor design using neural network  

Microsoft Academic Search

This paper presents the application of a neural network in optimizing design parameters of an induction motor. This approach is based on training the neural network with data generated from an optimization technique. A backpropagation with adaptive learning rate algorithm is utilized in training the network. Once trained, the neural network will be capable of producing a set of optimum

K. Idir; L. Chang; H. Dai

1995-01-01

306

Design two degree of linear motion X-Y plane machine using linear induction motor  

Microsoft Academic Search

This paper introduces a review of the two basic designs of linear induction motor (LIM). Two designs (single side and double sided) are introduced. The modeling of the LIM is given as relations between the variables and the motor parameters. The control techniques for the motor are given. The problems from which the motor suffers due to the construction and

A. F. A. El-Halim; M. A. Ashraf; I. F. Al-Arabawy

2008-01-01

307

Stepping motor controller  

DOEpatents

A stepping motor is microprocessor 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.

Bourret, S.C.; Swansen, J.E.

1982-07-02

308

Stepping motor controller  

DOEpatents

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.

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

1984-01-01

309

Simplified exponentially convergent rotor resistance estimation for induction motors  

Microsoft Academic Search

One of the main problems in induction motor (IM) control is the lack of knowledge about the actual value of the rotor resistance, which is subjected to large variations during operation. Due to the unavailability of the rotor electrical quantities, it is not easy to define an error signal suitable to be used as \\

Giorgio Bartolini; Alessandro Pisano; Pierluigi Pisu

2003-01-01

310

Using induction motor stator windings to extract speed information  

Microsoft Academic Search

A speed regulator based on a field-oriented control was constructed using speed information available from the moving flux wave in the air gap of an induction motor. The information takes the form of ripples in the flux caused by the motion of rotor bars through the flux wave. This information is accessed by using voltages available from taps taken off

DONALD S. ZINGER; T.A. Lipo; DONALD W. NOVOTNY

1989-01-01

311

Observers for induction motor state and parameter estimation  

Microsoft Academic Search

The Kalman filter in its basic form is a state estimator and can be applied to the problem of estimating induction motor rotor currents in a vector control scheme. This filter is shown to combine information from the plant model with output measurements to produce an optimal estimate of the unmeasured states. Also described is the application of the extended

David J. Atkinson; Paul P. Acarnley; John W. Finch

1991-01-01

312

Model-based fault detection in induction Motors  

Microsoft Academic Search

In this paper a model-based fault detection method for induction Motors is presented. A new filtering technique based on Unscented Kalman filters and Extended Kalman filters, is utilized as a state estimation tool in broken bars detection of induction motors. Using the merits of these recent nonlinear estimation tools UKF and EKF, rotor resistance of an induction motor is estimated

F. Karami; J. Poshtan; M. Poshtan

2010-01-01

313

Effect of temperature rise on the performance of induction motors  

Microsoft Academic Search

This paper presents and discusses the theoretical and experimental results of the associated effects of temperature rise on the performance of the induction motor. These effects are theoretically studied, in which a model for the induction motor is developed by using MATLAB program. The model adopted is involving the electrical, mechanical, and thermal effects of the induction motor. Simulation results

F. A. Khalifa; S. Serry; M. M. Ismail; B. Elhady

2009-01-01

314

Artificial Neural Network Based Designing System for Induction Motors  

Microsoft Academic Search

An artificial neural network (ANN) based designing method has been proposed for induction motors. Based on the real design data for various types of induction motors with different rating, three-layered cascaded artificial neural networks have been specified and trained to estimate the fundamental quantities and parameters, and also to give proper sizes of the target induction motor. Totally, thirty-four cage

Masahiro Ikeda; Takaaki Nakayama; Takashi Hiyama

2005-01-01

315

Application of soft computing techniques to induction motor design  

Microsoft Academic Search

Purpose – The purpose of this paper is to present a comparative study of the various soft computing techniques and their application to optimum design of three-phase induction motor design. Design\\/methodology\\/approach – The need for energy conservation is increasing the requirements for increased efficiency levels of induction motor. It is therefore important to optimize the efficiency of induction motor in

S. Padma; R. Bhuvaneswari; S. Subramanian

2007-01-01

316

Optimization of induction motor efficiency: Volume 2, Single-phase induction motors: Final report  

Microsoft Academic Search

The optimal design of the motor dimensions, the capacitance of the run capacitor, the winding distribution and the choice of the electrical steel are the most important sources for an improvement of the efficiency of modern single-phase induction motors for given performance and material cost constraints. The formulation of the techniques which realize this optimization is based on nonlinear programming

E. F. Fuchs; H. Huang; A. J. Vandenput; J. Holl; J. Appelbaum; Z. Zak; M. S. Erlicki

1987-01-01

317

The right μP simplifies using induction motors to propel electric cars  

Microsoft Academic Search

In electric vehicles (EVs), AC induction motors can provide variable speed at low cost. The most common method for controlling induction motors uses a 3-phase AC voltage-source inverter with sine-wave PWM (pulse width modulation). Because the motor`s speed and acceleration depend on amplitude as well as frequency, the inverter must produce sine waves of variable voltage and frequency. The authors

J. Baum; K. Berringer

1994-01-01

318

Experimental Investigation on the Effects of Direct Torque Control Strategy in Eccentricity-related Frequency Components of Line Current of Induction Motors  

Microsoft Academic Search

Eccentricity is a major fault in squirrel-cage induction motors. If this fault is not diagnosed and removed in the initial stages, the rotor may rub the stator and seriously damage the motor. The most well-known and probably most applicable fault diagnosis indices are harmonics components with definite frequencies in the stator current. The main objective of this article is to

Jawad Faiz; Mansour Ojaghi

2010-01-01

319

The dynamic braking of induction motors  

NASA Astrophysics Data System (ADS)

The dynamic braking of induction motors is investigated with particular emphasis on the use of zero-sequence connections. The braking performance using both ac and dc supplies is compared. A mathematical model is developed to predict both the transient and steady-state zero-sequence braking performance. To ensure accurate calculations, a model is constructed to allow for the variation of secondary parameters with frequency due to the skin effect. A method for determining the zero-sequence parameters using locked rotor variable frequency data is presented. To measure the transient acceleration torque of the machine, a rotational accelerometer is developed from a small single-phase induction motor. Good correlation between measured and calculated results is achieved during switching transients for both current and torque.

Hickman, B.

1985-03-01

320

Artificial Neural Network Based Designing System for Induction Motors  

NASA Astrophysics Data System (ADS)

An artificial neural network (ANN) based designing method has been proposed for induction motors. Based on the real design data for various types of induction motors with different rating, three-layered cascaded artificial neural networks have been specified and trained to estimate the fundamental quantities and parameters, and also to give proper sizes of the target induction motor. Totally, thirty-four cage rotor type induction motors, which were designed by different engineers, have been selected for the training data. These induction motors have different ratings, different capacities, and different usage, i. e., driving units for pumps, compressors, and fans. The type of cooling method is totally enclosed the fan cooled type for all the selected induction motors. Through the numerical simulations based on the actual design data for different types of induction motors, the efficiency of the proposed designing system has been demonstrated.

Ikeda, Masahiro; Nakayama, Takaaki; Hiyama, Takashi

321

Geometrical Approach to Induction Motor Design  

Microsoft Academic Search

The paper proposes a procedure for the electromagnetic design of three phase induction motors. The procedure is based on self-consistent equations. This approach does not use the typical experience\\/historical data-base collection as usual done in a lot of company design offices. Obviously, some design specifications (such as the electric and magnetic material solicitations) have to be imposed by the user,

A. Boglietti; A. Cavagnino; M. Lazzari

2007-01-01

322

Comparison of experimental and aggregate induction motor responses  

SciTech Connect

Experimental results are presented to compare the active and reactive power responses of induction motor loads, that are subjected to a sudden change in voltage magnitude, with responses that are obtained from third and fifth order aggregate induction motor models. The need to use a fifth order model to adequately represent the power transients is demonstrated. A system simulation of a network of larger induction motors is used to confirm the need for a fifth order model as motor size increases.

Lem, T.Y.J.; Alden, R.T.H. (McMaster Univ., Hamilton, Ontario (Canada))

1994-11-01

323

Secondary Resistance Identification of an Induction-Motor Applied Model Reference Adaptive System and Its Characteristics  

Microsoft Academic Search

Induction-motor torque is not accurately controlled when the estimated secondary resistance of an induction-motor model in a vector controller differs from the true secondary resistance. An algorithm which identifies the secondary resistance on-line is developed. The motor operating condition for secondary resistance identification, the stable identifier organization, and the experimental investigation confirming the identification algorithm performance are presented. The algorithm

Hidehiko Sugimoto; Shinzo Tamai

1987-01-01

324

Stator and rotor resistance observers for induction motor drive using fuzzy logic and artificial neural networks  

Microsoft Academic Search

This paper presents a new method of on-line estimation for the stator and rotor resistances of the induction motor in the indirect vector controlled drive, using fuzzy logic and artificial neural networks. The back propagation algorithm is used for the training of the neural networks for rotor resistance identification. The error between the desired state variable of an induction motor

Baburaj Karanayil; Muhammed Fazlur Rahman; Colin Grantham

2003-01-01

325

The SVM-DTC system of the bearingless induction motor based on model reference adaptive  

Microsoft Academic Search

Considering the need of speed sensorless operation for bearingless induction motor, the model reference adaptive method which takes reactive power as reference quantity is used to identify speed for the SVM-DTC system of the bearingless induction motor. The method eliminates the influences of pure integration and rotor resistance. Simulation results show that model reference adaptive control using reactive power as

Yuxin Sun; Yanqing Mao; Xianxing Liu; Zhengqi Wang

2011-01-01

326

Research of Sensorless Induction Motor Monitoring and Measuring System  

Microsoft Academic Search

In order to reduce t he co st of mo nitoring and measuring system of induction motor and wit ho ut increasing t he roto rs rotational , t he rotor speed and elect ro magnetic torque estimation wit h good performance of induction motor based on t he algo rit hm of estimating inductio n motors dynamic velocit y

H E Zhi

327

Current signature analysis to detect induction motor faults  

Microsoft Academic Search

Three-phase induction motors are the “workhorses” of industry and are the most widely used electrical machines. In an industrialized nation, they can typically consume between 40 to 50% of all the generated capacity of that country. This article focuses on the industrial application of motor current signature analysis (MCSA) to diagnose faults in three-phase induction motor drives. MCSA is a

W. T. Thomson; M. Fenger

2001-01-01

328

Multisensor fusion for induction motor aging analysis and fault diagnosis  

Microsoft Academic Search

Induction motors are the most commonly used electrical drives, ranging in power from fractional horsepower to several thousand horsepowers. Several studies have been conducted to identify the cause of failure of induction motors in industrial applications. Recent activities indicate a focus towards building intelligence into the motors, so that a continuous on-line fault diagnosis and prognosis may be performed. The

Ali Seyfettin Erbay

1999-01-01

329

Study of Harmonics Effects on Performance of Induction Motors  

Microsoft Academic Search

With increasing the number of harmonics generating devices in power systems, the problem of their impact on the performance of system components like induction motors needs further consideration. Approximately, 60% of loads in all over the world are motor loads. More than 90% of these loads are consumed by three phase induction motors with a big utility factor between 0\\/7-0.9

HASHEM ORAEE MIRZAMANI; AZIM LOTFJOU CHOOBARI

330

Rotor Constructions for a High-Speed Induction Motor.  

National Technical Information Service (NTIS)

The motivation of this work was to identify the changes in the optimal design of a high-speed induction motor in comparison to a conventional motor design. The aim was acquire knowledge on how to build good high-speed induction motors. Special attention w...

J. Laehteenmaeki

2001-01-01

331

Application of fuzzy decision to optimization of induction motor design  

Microsoft Academic Search

This paper describes a maximizing decision making scheme employing fuzzy set theory for the optimal design of induction motors. The fuzzy maximizing decision making is combined with a motor synthesis method, which can reflect the designer's experience, view and judgment. The proposed algorithm is applied to a multiobjective optimization of an induction motor design

Jeong-Tae Park; Cheol-Gyun Lee; Min-Kyu Kim; Hyun-Kyo Jung

1997-01-01

332

A Frequency Demodulation Approach to Induction Motor Speed Detection  

Microsoft Academic Search

Rotor slot harmonics are found in the stator current waveforms for most squirrel-cage induction motors. These har- monics are caused by the finite number of rotor slots in a motor, and their frequencies are inherently correlated with the motor's rotational speed. A frequency demodulation approach is proposed in this paper to continuously and accurately track the rotational speed for induction

Zhi Gao; Larry Turner; Roy S. Colby; Benoit Leprettre

2011-01-01

333

A frequency demodulation approach to induction motor speed detection  

Microsoft Academic Search

Rotor slot harmonics are found in the stator current waveforms for most squirrel-cage induction motors. These harmonics are caused by the finite number of rotor slots in a motor, and their frequencies are inherently correlated with the motor's rotational speed. A frequency demodulation approach is proposed in this paper to continuously and accurately track the rotational speed for grid-connected induction

Zhi Gao; Larry Turner; Roy S. Colby; Benoit Leprettre

2010-01-01

334

A Distributed Parameter Thermal Model for Induction Motors  

Microsoft Academic Search

Thermal analysis of an induction machine forms an important part of design calculations. This paper presents a distributed parameter thermal model for transient temperature estimation of a TEFC induction motor. The thermal characteristics of a capacitor run single phase induction motor has been simulated using MATLAB and the results have been compared with the experimental results. Though the model has

S. K. Chowdhury

2005-01-01

335

Autotuning Rotor Resistance Identification of Induction Motor Considering Iron Loss  

Microsoft Academic Search

The paper deals with rotor resistance identification of induction motor considering core loss. The rotor resistance can not be measured directly and easily varies with the increasing temperature. The problem of its identification bases on equivalent circuit. In the equivalent circuit, the equivalent resistance of core loss is in parallel with mutual inductance of induction motor in two-phase stationary frame.

Aiyuan Wang; Zhihao Ling

2009-01-01

336

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

SciTech Connect

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.

Mikesell, H.E.; Lucy, E.

1998-02-03

337

Direct Flux and Torque Regulation in a PWM Inverter-Induction Motor Drive  

Microsoft Academic Search

A dc motor drive is controlled by varying the armature current and field current. The field is a measure of flux, and the armature current times field current is a measure of torque. Various approximate means of estimating the flux and torque levels in an induction motor exist. Most of these methods are sensitive to motor parameter value changes and

Allan B. Plunkett

1977-01-01

338

Induction machine condition monitoring using notch-filtered motor current  

Microsoft Academic Search

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

Serkan Günal; Ömer Nezih Gerek

2009-01-01

339

Induction Motor Optimum Design, Including Active Power Loss Effect  

Microsoft Academic Search

The paper presents the optimum design of three-phase squirrel-cage induction motor on the basis of minimizing the annual cost of the motor. The annual cost is the sum of the annual interest and depreciation of the motor active material costs, annual cost of the active power loss of the motor and the annual energy cost required to supply such power

N. H. Fetih; H. M. El-Shewy

1986-01-01

340

Advanced motor and motor control development  

Microsoft Academic Search

The capability of operating a high speed permanent magnet brushless dc motor with electronic controller over a wide load and speed range was demonstrated. A centrifugal pump was used as the loading mechanism and hydraulic fluid was pumped in simulation of an aircraft engine fuel pump requirement. A motor speed of 45,000 rpm was reached and a maximum output of

Kenneth L. Wuertz; Edward D. Beauchamp

1988-01-01

341

Sensorless position detection for vector-controlled induction motor drives using an asymmetric outer-section cage  

Microsoft Academic Search

This paper describes a new method of obtaining a rotor position signal from a cage induction machine operating without a mechanical sensor. The method is based on introducing a circumferential variation in the resistance of a high-resistance outer-section cage of an induction-machine rotor. Simulation results using a linear “double-cage” machine equivalent show that the method is feasible and provides incremental

Joseph Cilia; Greg M. Asher; Keith J. Bradley; Mark Sumner

1997-01-01

342

Specifications for Linear Induction Motor P/n 546230, Turboalternator Package P/n 546798, Auxiliary Power Unit P/n 928288, Manual Control P/n 44290.  

National Technical Information Service (NTIS)

The document describes the basic power systems supplied for the linear induction motor test vehicle. The alternator is matched to the turbine, and is capable of providing 3000KVA at 0.6 pf, at 173 Hz, which can be exceeded only by using 'military overload...

G. Kalman J. Chapa

1969-01-01

343

Robust multivariate control charts for early detection of broken rotor bars in an induction motors fed by a voltage source inverter  

Microsoft Academic Search

In this paper, we present a work in progress about the development of an expert system to detect incipient faults related to asymmetries in the rotor cage in induction motors fed by Voltage Source Inverters. The expert system is based on a condition monitoring technique based on robust statistical tools, and it makes use of the Fast Fourier Transform to

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

2011-01-01

344

An Adaptive Observer With Online Rotor and Stator Resistance Estimation for Induction Motors With One Phase Current Sensor  

Microsoft Academic Search

An adaptive observer with online estimation of rotor and stator resistances is considered for induction motors, while only one phase current is measured. Generally, an induction motor drive controller needs at least two phase-current sensors. Nevertheless, failure of one current sensor results in degradation of motor drive performance and reliability, and also state and parameter estima- tion errors. Furthermore, any

Farzad R. Salmasi; Tooraj Abbasian Najafabadi

2011-01-01

345

New adaptive flux observer of induction motor for wide speed range motor drives  

Microsoft Academic Search

A flux observer of an induction motor with a parameter adaptive scheme is proposed. The parameters identified adaptively are stator and rotor resistance, which vary with motor temperature. The stability of the proposed adaptive flux observer is proved using Lyapunov's theorem. The robustness of the induction motor drive system with the proposed flux observer is shown. The adaptive scheme can

Hisao Kubota; Kouki Matsuse; Takayoshi Nakano

1990-01-01

346

Lyapunov exponent for aging process in induction motor  

NASA Astrophysics Data System (ADS)

Nonlinear systems like electrical circuits and systems, mechanics, optics and even incidents in nature may pass through various bifurcations and steady states like equilibrium point, periodic, quasi-periodic, chaotic states. Although chaotic phenomena are widely observed in physical systems, it can not be predicted because of the nature of the system. On the other hand, it is known that, chaos is strictly dependent on initial conditions of the system [1-3]. There are several methods in order to define the chaos. Phase portraits, Poincaré maps, Lyapunov Exponents are the most common techniques. Lyapunov Exponents are the theoretical indicator of the chaos, named after the Russian mathematician Aleksandr Lyapunov (1857-1918). Lyapunov Exponents stand for the average exponential divergence or convergence of nearby system states, meaning estimating the quantitive measure of the chaotic attractor. Negative numbers of the exponents stand for a stable system whereas zero stands for quasi-periodic systems. On the other hand, at least if one of the exponents is positive, this situation is an indicator of the chaos. For estimating the exponents, the system should be modeled by differential equation but even in that case mathematical calculation of Lyapunov Exponents are not very practical and evaluation of these values requires a long signal duration [4-7]. For experimental data sets, it is not always possible to acquire the differential equations. There are several different methods in literature for determining the Lyapunov Exponents of the system [4, 5]. Induction motors are the most important tools for many industrial processes because they are cheap, robust, efficient and reliable. In order to have healthy processes in industrial applications, the conditions of the machines should be monitored and the different working conditions should be addressed correctly. To the best of our knowledge, researches related to Lyapunov exponents and electrical motors are mostly focused on the controlling the mechanical parameters of the electrical machines. Brushless DC motor (BLDCM) and the other general purpose permanent magnet (PM) motors are the most widely examined motors [1, 8, 9]. But the researches, about Lyapunov Exponent, subjected to the induction motors are mostly focused on the control theory of the motors. Flux estimation of rotor, external load disturbances and speed tracking and vector control position system are the main research areas for induction motors [10, 11, 12-14]. For all the data sets which can be collected from an induction motor, vibration data have the key role for understanding the mechanical behaviours like aging, bearing damage and stator insulation damage [15-18]. In this paper aging of an induction motor is investigated by using the vibration signals. The signals consist of new and aged motor data. These data are examined by their 2 dimensional phase portraits and the geometric interpretation is applied for detecting the Lyapunov Exponents. These values are compared in order to define the character and state estimation of the aging processes.

Bayram, Duygu; Ünnü, Sezen Y?d?r?m; ?eker, Serhat

2012-09-01

347

The right {mu}P simplifies using induction motors to propel electric cars  

SciTech Connect

In electric vehicles (EVs), AC induction motors can provide variable speed at low cost. The most common method for controlling induction motors uses a 3-phase AC voltage-source inverter with sine-wave PWM (pulse width modulation). Because the motor`s speed and acceleration depend on amplitude as well as frequency, the inverter must produce sine waves of variable voltage and frequency. The authors describe how a single microcontroller can provide such control functions while generating PWM waveforms in which the modulation is sinusoidal.

Baum, J.; Berringer, K. [Motorola Inc., Phoenix, AZ (United States). Product Sector

1994-03-31

348

An Online Simplified Rotor Resistance Estimator for Induction Motors  

Microsoft Academic Search

This brief presents an adaptive variable structure identifier that provides finite time convergent estimate of the induction motor rotor resistance under feasible persistent of excitation condition. The proposed rotor resistance scheme is based on the standard dynamic model of induction motor expressed in a fixed reference frame attached to the stator. The available variables are the rotor speed, the stator

Godpromesse Kenne; Rostand Sorel Simo; Françoise Lamnabhi-Lagarrigue; Amir Arzande; Jean Claude Vannier

2010-01-01

349

Computational analysis of temperature rise phenomena in electric induction motors  

Microsoft Academic Search

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

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

2003-01-01

350

Skin effect experimental validations of induction motor squirrel cage parameters  

Microsoft Academic Search

Purpose – The paper deals with the experimental validations of the corrective coefficient used to take into account the skin effect in the equivalent circuit rotor resistance of induction motors with squirrel cages. Design\\/methodology\\/approach – Locked rotor tests have been performed at several supply frequencies on different induction motors; the collected experimental data have been used to validate the rotor

Aldo Boglietti; Andrea Cavagnino; Luca Ferraris; Mario Lazzari

2010-01-01

351

Induction motor loads and voltage stability assessment using PV curves  

Microsoft Academic Search

Knowledge of the load composition and characteristics, such as corresponding PV curves, are necessary tools for the voltage stability analysis. This paper investigates small industrial induction motors that are operated under different mechanical load conditions. Experimental tests were performed to determine the system's PV characteristics and assess the voltage stability under different loading composition. The load characteristics of induction motor

León Max Vargas; Juri Jatskevich; José R. Martí

2009-01-01

352

Five-level GTO inverters for large induction motor drives  

Microsoft Academic Search

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

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

1994-01-01

353

OPTIMIZATION FOR INDUCTION MOTOR DESIGN BY IMPROVED GENETIC ALGORITHM  

Microsoft Academic Search

Optimization for induction motor design is one of the interested subjects by electrical engineers. This paper proposes an Improved Genetic Algorithm (IGA) for optimization of 3-phase induction motor design. The proposed IGA possesses the characteristics of real number encoding, stochastic crossover operator, self-adaptable mutation operator and annealing penalty function, and multi- turns evolution strategy for solving nonlinear constrained multivariable optimization

Li HAN; Hui LI; Jingcan LI; Jianguo ZHU

2004-01-01

354

Dual-Source Fed Multi-phase Induction Motor Drive for Fuel Cell Vehicles: Topology and Control  

Microsoft Academic Search

The paper introduces a new multi-source fed drive topology based on a multi-phase induction machine. The reference application is the hybrid fuel cell (FC) traction system (fuel cell and battery). The FC power and the battery power are directly added at the machine level, without any additional DC-DC converters. The proposed drive topology uses two three-phase inverters having different DC

R. Bojoi; A. Tenconi; F. Farina; F. Profumo

2005-01-01

355

PVDF based vibration measurements and their correlation with torque estimation in a FOC induction motor drive  

Microsoft Academic Search

This paper presents a study concerning the vibrations generated by an induction motor drive controlled by field oriented control algorithm (FOC). The aim of the study is to identify suitable measurement points and analysis techniques in order to achieve information about vibration generated by an electric drive. Vibrations take origin both by the torque generated by the motor and the

Leonardo D'Acquisto; Giuseppe Abbate; Marcello Pucci; G. Vitale; M. Kesri

2008-01-01

356

A Variable Gain PI Controller Used for Speed Control of a Direct Torque Neuro Fuzzy Controlled Induction Machine Drive  

Microsoft Academic Search

This paper presents an original variable gain PI (VGPI) controller for speed control of a direct torque neuro fuzzy controlled (DTNFC) induction motor drive. First, a VGPI speed controller is designed to replace the classical PI controller in a conventional direct torque controlled induction motor drive. Its simulated performances are then compared to those of a classical PI controller. Then,

A. MILOUDI; Eid A. AL-RADADI; A. D. DRAOU

357

Model Reference Adaptive System Against Rotor Resistance Variation in Induction Motor Drive  

Microsoft Academic Search

The paper deals with a compensation method of the rotor-resistance variation in induction motor drives using high-performance slip-frequency control. Our proposed method is based on a discrete-type model reference adaptive system (MRAS), and it is implemented in an 8086 microprocessor. When an induction motor is driven by a controlled current source, the system sensitivity to the rotor resistance variation is

Kouhei Ohnishi; Youzou Ueda; Kunio Miyachi

1986-01-01

358

Optimization of induction motor efficiency. Volume 1. Three-phase induction motors  

SciTech Connect

This report describes an optimization technique where variables, variable constants and constants are used, instead of variables and constants as is done in an ordinary optimization problem. This novel classification of the parameters leads to a better accuracy of the optimal results as compared with a classification in variables and constants only. At the outset of the study, the motor performance equations describing the power factor, the locked-rotor current ratio, the starting to rated torque ratio, the maximum to rated torque ratio, the efficiency, the slip and the temperature rise are derived from geometric quantities and the properties of the active materials. Subsequently the motor cost equations (e.g. production cost, capitalized cost and annual cost) are discussed. The sequential decomposition of the optimization method is based on closed-form equations of the above-mentioned motor performance and cost equations, which may represent the constraints as well as the objective function. The incorporation of the design program, updating the variable constants in the optimization procedure, is described next. As an example, a 100 hp induction motor is used to study the effect of different electrical steels, power factor, locked-rotor current and the production cost on the maximum efficiency, which serves as the objective function. The report also compares the increased efficiencies of motors obtained by the addition of materials with those of the optimally designed motors.

Fuchs, E.F.; Appelbaum, J.; Khan, I.A.; Holl, J.; Frank, U.V.

1985-07-01

359

Noninvasive detection of broken rotor bars in operating induction motors  

Microsoft Academic Search

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

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

1988-01-01

360

Design and Construction of Induction Motor Thermal Monitoring System  

Microsoft Academic Search

Rotor and stator temperature rise in induction motors is considered to be a major cause of motor insulation degradation and motor failures. In most cases, it is necessary to monitor rotor bars and stator windings to make sure that their temperature remains below the allowable limits. In this paper, design and implementation of a temperature measuring system suitable for three-phase

H. Hafezi; A. Jalilian

2006-01-01

361

Broken-Rotor-Bar Diagnosis for Induction Motors  

Microsoft Academic Search

Broken rotor bar is one of the commonly encountered induction motor faults that may cause serious motor damage to the motor if not detected timely. Past efforts on broken rotor bar diagnosis have been focused on current signature analysis using spectral analysis and wavelet transform. These methods require accurate slip estimation to localize fault-related frequency. This paper presents a new

Jinjiang Wang; Robert X. Gao; Ruqiang Yan

2011-01-01

362

Sensorless induction motor drive for photovoltaic pumping applications  

Microsoft Academic Search

Photovoltaic pumping systems without battery can provide a cost-effective use of solar energy. Initially, use of a dc motor was a standard. Nowadays, thanks to development of ac induction motor drive systems it is possible to use a more robust and less expensive motor for photovoltaic pumping application. Use of maximum power point tracker allows to improve system efficiency. On

M. A. Vitorino; M. B. R. Correa; C. B. Jacobina; A. M. N. Lima

2008-01-01

363

The Application of Synchronous and Induction Motors to Chippers  

Microsoft Academic Search

Wood chippers require motors with special characteristics to operate under exacting conditions involving high peak loads, severe vibration, acceleration of high inertia, and exposure to dirt and moisture. Methods are given to select the most suitable size of chipper, to determine the proper rating and characteristics of a motor to drive it, to choose beetwen synchronous and induction motors, and

R. R. Baker; M. R. Lory

1947-01-01

364

The goerges phenomenon-induction motors with unbalanced rotor impedances  

Microsoft Academic Search

The Goerges phenomenon is the operation of a 3-phase wound-rotor induction motor at half of synchronous speed, and it is obtained by unbalancing the rotor circuit. If the motor is started with one rotor phase opened or with rotor impedances greatly unbalanced, it will accelerate to half speed and operate stably as a motor or generator. Several investigators have made

Harold L. Garbarino; Eric T. B. Gross

1950-01-01

365

Derivation of induction motor models from standstill frequency response tests  

SciTech Connect

The objective of EPRI Research Project 2328-4 was to investigate the feasibility of determining the electrical equivalent circuit parameters of induction motors using the standstill frequency response (SSFR) test. The SSFR test measures the impedance of the motor, with its rotor stationary, over a wide range of frequencies (.01 Hz to 500 Hz). The SSFR test was performed on induction motors with ratings of 1750 HP, 100 HP, 400 HP, and 300 HP. Equivalent circuits were derived for each motor from the test data. Reasonable agreement with manufacturer's performance data was achieved for three of the four motors tested, suggesting that the SSFR test can be useful in determining induction motor models. Where motor starting behavior is of interest, accounting for saturation effects was shown to be important. 10 refs., 46 figs., 9 tabs.

Willis, J.R.; de Mello, F.P. (Power Technologies, Inc., Schenectady, NY (United States)); Rusche, P.A.; Mueller, E.J.; Brock, G.J. (Consumers Power Co., Jackson, MI (United States))

1991-07-01

366

Optimization of induction motor efficiency: Volume 2, Single-phase induction motors: Final report  

SciTech Connect

The optimal design of the motor dimensions, the capacitance of the run capacitor, the winding distribution and the choice of the electrical steel are the most important sources for an improvement of the efficiency of modern single-phase induction motors for given performance and material cost constraints. The formulation of the techniques which realize this optimization is based on nonlinear programming approaches. The Method of Boundary Search Along Active Constraints is used for the optimal design of the motor dimensions of a commercially available 2 hp, 115 V single-phase induction motor. Based on the optimization results due to the above mentioned four optimization components, the relationships between efficiency, power factor, cost, active materials and the values of the capacitance of the run capacitor are studied and the limited validity of the model law is discussed. This report also explains why the Wanlass retrofit improves efficiency and details the advantages and disadvantages of such a retrofitting as compared with the operation in the standard configuration.

Fuchs, E.F.; Huang, H.; Vandenput, A.J.; Holl, J.; Appelbaum, J.; Zak, Z.; Erlicki, M.S.

1987-05-01

367

Fuzzy Logic Controllers for Electric Motors and Wind Turbines.  

National Technical Information Service (NTIS)

The paper discusses a precision laboratory test facility that has been assempbled to test the performance of two fuzzy-logic based controllers for electric motors and wind turbines. Commercial induction motors up to 10 hp (7.46 kWe) in motors and equipped...

R. J. Spiegel

1997-01-01

368

An Inverter-Driven Induction Motor System with a Deadlock Breaking Capability  

NASA Astrophysics Data System (ADS)

Induction motors are very widely used in various industrial applications. In semiconductor manufacturing processes, deadlock failure of pumps may occur by the adhering of glass material contained in the gas to the rotor. This can lead to the shutdown of the manufacturing plant. Therefore, a countermeasure to prevent deadlocking of a motor is required. This paper proposes a method for generating an impulse torque in an induction motor fed by an inverter. The proposed inverter circuit is composed of a conventional inverter and a few additional relays. The on-and-off control of the relays supplies an appropriate magnetizing current and a large torque current from the dc-link capacitor. In experiment, a 1.5-kW cage-type induction motor generated a torque that was approximately seven times larger than the rated torque of the motor. This large impulse torque is useful for breaking the motor deadlock.

Ichikawa, Takuto; Yoshida, Toshiya; Miyashita, Osamu

369

Variable gain PI controller design for speed control and rotor resistance estimation of an indirect vector controlled induction machine drive  

Microsoft Academic Search

This paper presents an original variable gain PI (VGPI) controller for speed control and rotor resistance estimation of an indirect vector controlled (IVC) induction motor drive. First, a VGPI speed controller is designed. Its simulated performances in speed control and rotor resistance estimation are compared to those of a classical PI controller. Simulation of the IVC induction motor drive using

A. Miloudi; A. Draou

2002-01-01

370

Parallel computation of continually on-line trained neural networks for identification and control of induction motors  

Microsoft Academic Search

This paper presents an adaptive parallel processing control scheme, using an artificial neural network (ANN) which is trained while the controller is operating online. The proposed control structure incorporates five-multilayer feedforward ANNs, which are online trained using the Levenburg-Marquadt learning method. The five networks are used exclusively for system estimation. The estimation mechanism uses continual online training to learn the

Ahmed Rubaai; Raj Kotaru; M. D. Kankam

1999-01-01

371

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

Microsoft Academic Search

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

Li Wang; Lih-Shyh Liu

2000-01-01

372

Microprocessor controller for stepping motors  

Microsoft Academic Search

A new concept for digital computer control of multiple stepping motors which operate in a severe electromagnetic pulse environment is presented. The motors position mirrors in the beam-alignment system of a 100-kJ COâ laser. An asynchronous communications channel of a computer is used to send coded messages, containing the motor address and stepping-command information, to the stepping-motor controller in a

B. G. Strait; M. E. Thuot

1977-01-01

373

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

NASA Astrophysics Data System (ADS)

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.

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

374

A simplified speed controller for direct torque neuro fuzzy controlled induction machine drive based on a variable gain PI controller  

Microsoft Academic Search

This paper presents an original variable gain PI (VGPI) controller for speed control of a simplified direct torque neuro fuzzy controlled (DTNFC) induction motor drive. First, a simplified direct torque neuro fuzzy control (DTNFC) for a voltage source PWM inverter fed induction motor drive is presented. This control scheme uses the stator flux amplitude and the electromagnetic torque errors through

Azeddine Draou; Abdellah Miloudi

2010-01-01

375

Sensor-less Drive of Induction Motor Based on A New Hybrid Cascaded Multilevel Inverter  

Microsoft Academic Search

Power electronic inverters are becoming more and more popular for various industrial drive applications. Many kinds of multilevel inverter topologies have been proposed to enhance the performance of motor drive system during last two decades. In this paper, a sensor-less drive of induction motor based on a new hybrid cascaded multilevel and SVM controls are presented. In the proposed drive

Jianye Rao; Yongdong Li

2009-01-01

376

Thermal Performance of a Three-Phase Induction Motor Under Fault Tolerant Operating Strategies  

Microsoft Academic Search

This paper presents the thermal behaviour of a three-phase induction motor under direct torque control, when supplied by a three-phase voltage source inverter with fault tolerant capabilities. For this purpose, a fault tolerant operating strategy based on the connection of the faulty inverter leg to the DC link middle point was considered. The motor thermal profile is obtained through the

A. M. S. Mendes; X. M. Lopez-Fernandez; A. J. M. Cardoso

2005-01-01

377

Thermal Performance of a Three-Phase Induction Motor Under Fault Tolerant Operating Strategies  

Microsoft Academic Search

This paper presents the thermal behavior of a three-phase induction motor under direct torque control, when supplied by a three-phase voltage source inverter with fault tolerant capabilities. For this purpose, a fault tolerant operating strategy based on the connection of the faulty inverter leg to the dc link middle point was considered. The motor thermal profile is obtained through the

AndrÉ M. S. Mendes; XosÉ M. Lopez-Fernandez; AntÓnio J. Marques Cardoso

2008-01-01

378

Synchronous Motor Railcar Propulsion  

Microsoft Academic Search

Development of ac motor drives for rail transit car has centered on the induction motor with pulsewidth modulated (PWM) inverter control. Interest in the induction motor as a replace for the series dc traction motor stems from the simplicity of the squirrel cage rotor of the induction motor. In this article, the short-comings of PWM inverter-induction motor transit car drive

Frank J. Bourbeau

1977-01-01

379

Üç Fazli Asenkron Motor Tasarimi ve FFT Analizi Three Phase Induction Motor Design and FFT Analysis  

Microsoft Academic Search

In this paper, an algorithm for three-phase induction motor's design and calculation of equivalent circuit parameters and performance characteristics was introduced. Using this algorithm, an induction motor can be designed for various rotor and stator slot geometries giving nameplate data and magnetic flux densities for used materials. For obtained geometries, equivalent circuit parameters was calculated and compared with open and

Murat TEZCAN; A. Gökhan; A. ?hsan; Mustafa TURAN; Dumlupinar Üniversitesi; Sakarya Üniversitesi

380

Analysis of the relationship between induction motor current and shaft speed fluctuations.  

National Technical Information Service (NTIS)

For induction motors, motor shaft speed variations accompany motor load torque variations and motor torque variations. Hence, shaft speed fluctuation detection can serve as a warning of undesirable motor load conditions. This paper presents a theoretical ...

C. H. Nowlin

1992-01-01

381

Different techniques for real time estimation of an induction motor rotor resistance in sensorless direct torque control for electric vehicle  

Microsoft Academic Search

Four different techniques for rotor resistance estimation in sensorless direct torque control (DTC) are studied and compared. Since the input voltage contains harmonics, many available techniques cannot be applied in the DTC. Three of the four above-mentioned techniques are the generalization of the previous methods. The fourth technique is a new one, which is applied by the authors. The speed

Jawad Faiz; Mohammad B. B. Sharifian

2001-01-01

382

MATE Module 10: Control Systems: Motor Control  

NSDL National Science Digital Library

This module from the Marine Advanced Technology Education Center introduces students to basic Brushed DC motor concepts. Students will learn to describe the methods of speed control for a Brushed DC motor, calculate the necessary PWM duty cycle needed for specific motor voltages, describe the operation of motor control H-Bridges and describe the danger relating to improper control of the H-Bridge. A PowerPoint presentation of the lecture material is available for download.

2013-07-05

383

Synchronous machine models for simulation of induction motor transients  

SciTech Connect

Induction motors form a considerable portion of industrial loads; hence, the analysis of their performance is often required in system studies. The analysis is either concerned with steady-state performance, or with transient performance during start-up and during system disturbances. The Electromagnetic Transients Program (EMTP) is one type of computer program which can be used for transient analysis. This paper presents the details of using the existing EMTP synchronous machine model to simulate induction motor transients.

Hung, R.; Dommel, H.W. [Univ. of British Columbia, Vancouver, British Columbia (Canada). Dept. of Electrical Engineering

1996-05-01

384

Thermal model of induction motor for relay protection  

Microsoft Academic Search

Problems of protecting an induction motor against the overheating of its stator winding and disadvantages of the thermal model\\u000a with a single time constant are considered. The thermal model of an induction motor that contain five active elements is formed\\u000a using the method of thermal circuits. The advisability of the application of the model in the formation of algorithms of

A. V. Bulychev; E. Yu. Erokhin; N. D. Pozdeev; O. A. Filichev

2011-01-01

385

Improvement of the Efficiency of Induction Motors.  

National Technical Information Service (NTIS)

The electric motor as energy converter was studied for four groups of parameters: process, network, foundations, and environment. The feasibility of reducing the losses of asynchronous three phase motors with squirrel cage or with slip rings in the power ...

K. Falk J. Schoerner

1982-01-01

386

Wireless health monitoring system for vibration detection of induction motors  

Microsoft Academic Search

To avoid unexpected equipment failures and obtain higher accuracy in diagnostic for the predictive maintenance of induction motors, on-line health monitoring system plays an important role to improve the system reliability and availability. Among different techniques of fault detection, work on motor current signature analysis by using only stator current spectra has been well documented. In addition, the recent developments

Suratsavadee Korkua; Himanshu Jain; Wei-Jen Lee; Chiman Kwan

2010-01-01

387

High Phase Order Induction Motors??? Part II. Experimental Results  

Microsoft Academic Search

Experimental tests have been carried out on a small induction motor connected for six phases and for nine phases. These include torque measurements over the entire speed range and load tests with balanced source and with one phase open. Some of the machine impedances, including sequence impedances, were measured and these generally agree with predicted values. The motor was subjected

E. A. Klingshirn

1983-01-01

388

Performance Analysis of Saturated Induction Motors by Virtual Tests  

ERIC Educational Resources Information Center

|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…

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

2012-01-01

389

Transient effects in application of PWM inverters to induction motors  

Microsoft Academic Search

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

E. Persson

1992-01-01

390

Detecting load failures using the induction motor as a transducer  

Microsoft Academic Search

This work shows the feasibility of detecting load mechanical failures in drive train by using the induction motor as a transducer and applying MCSA (Motor Current Signature Analysis) technique to identify the characteristic fault frequency components. Furthermore, it presents the detection of problems in the transmission system and its relationship with the problems originated in the attached load. Data extract

Erik L. Bonaldi; Levy Ely L. Oliveira; Jonas G. Borges Da Silva; Germano Lambert-torres; Luiz Eduardo Borges Da Silva

2008-01-01

391

An analytical iterative model (AIM) for induction motor design  

Microsoft Academic Search

The paper introduces a practical (analytical) nonlinear (iterative) main field model (AIM) directly attachable to the three phase induction motor industrial design tools. The two dimensional model divides the motor cross section into five circular domains. The slotting domains are homogenized and characteristic magnetic permeabilities for each domain are defined. The calculated magnetization characteristic and, respectively, core losses are fully

G. Madescu; I. Boldea; T. J. E. Miller

1996-01-01

392

Improved neural network model for induction motor design  

Microsoft Academic Search

An improved model of the artificial neural network for analysis and design of induction motors is presented. Parameters of the machine equivalent circuit are calculated using finite element method for a given motor geometry. The training of the neural network model is based on a decoupled system between geometrical variables and circuit parameters. This method efficiently improved the training and

K. Idir; Liuchen Chang; Heping Dai

1998-01-01

393

Analytic Evaluation of HTS Induction Motor for Electric Rolling Stock  

Microsoft Academic Search

Induction motor in place of DC one has been applied widely for DC electric rolling stock, because of the advantage of its utility and efficiency. However, further improvement of motor characteristics is crucial in order to realize environment-friendly DC railway system in the future. It is important to study more effi- cient machine; applying DC electric rolling stock for the

T. Konishi; T. Nakamura; T. Nishimura; N. Amemiya

2011-01-01

394

Energy Saving Electrical Motor Control System.  

National Technical Information Service (NTIS)

An energy saving system in AC electrical motors which provides optimum control of the rriac control voltage supplied to different motors with which the system is used, despite the different characteristics of such motors is described. A three phase motor,...

T. M. Edge

1982-01-01

395

Thermal analysis of induction and synchronous reluctance motors  

Microsoft Academic Search

In this paper, the thermal behavior of two induction motors (2.2 and 4 kW, four poles) and two synchronous reluctance motors [(SynRMs) transverse-laminated] are investigated and compared. Both motor types use the same stator but have different rotors. Using a lumped-parameter simulation program, a thermal analysis has been also carried out, and the obtained results have been compared with the

Aldo Boglietti; Andrea Cavagnino; Michele Pastorelli; David Staton; Alfredo Vagati

2006-01-01

396

Six-Phase Voltage Source Inverter Driven Induction Motor  

Microsoft Academic Search

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

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

1984-01-01

397

Estimation of the rotor resistance in induction motor by application of the spiral vector theory associate to extended Kalman filter  

Microsoft Academic Search

For guaranteed good performances in transient and steady state in vector control of induction motor, it's necessary to conceive regulation of parameters variations, in particular rotor resistance. To solve this problem, innumerable works are devoted to rotor resistance, but they use Park's model of the induction motor for estimating this resistance. However this model use a hefty geometric transformation for

M. Menaa; O. Touhami; R. Ibtiouen

2003-01-01

398

A COMPLETE STATOR AND ROTOR RESISTANCE IDENTIFIER FOR INDUCTION MOTOR DRIVE USING FUZZY LOGIC AND ARTIFICIAL NEURAL NETWORKS  

Microsoft Academic Search

This paper presents a new method of on-line estimation for the stator and rotor resistances of the induction motor in the indirect vector controlled drive, using fuzzy logic and artificial neural networks. The back propagation algorithm is used for the training of the neural networks for rotor resistance identification. The error between the desired state variable of an induction motor

B. Karanayil; M. F. Rahman; C. Grantham

399

An online identification method for both stator-and rotor resistances of induction motors without rotational transducers  

Microsoft Academic Search

This paper describes an effective online method for identifying both stator and rotor resistances, which is useful in robust speed control of induction motors without rotational transducers. The identification method for stator resistance is derived from the steady-state equations of induction motor dynamics. On the other hand, the identification method for rotor resistance is based on the linearly perturbed equations

In-Joong Ha; Sang-Hoon Lee

2000-01-01

400

Dynamic modeling of induction motor taking into account thermal stresses  

Microsoft Academic Search

Purpose – The paper aims to estimate the thermal impact of temperature dependency of material characteristics on induction machines, for which a coupled electromagnetic thermal analysis is carried out. Design\\/methodology\\/approach – Both electromagnetic and thermal fields are calculated using a weak coupled finite element analysis algorithm. The electromagnetic behavior of the induction motor is obtained by coupling the field equations

S. Laïssaoui; M. R. Mékidèche; D. Sedira; A. Ladjimi

2007-01-01

401

Implementation of an embedded induction motor test and analysis system  

Microsoft Academic Search

This article presents the implementation of an embedded induction motor test and analysis system based on ARM and Linux. This system adopts the ARM microprocessor - S3C2410X - as the core of the hardware and the Linux as the embedded operating system. It can be used to sample and acquire the currents, voltages, and the rate of the tested induction

Hongbin Gao; Yukun Liu; Liwei Guo

2011-01-01

402

Advanced Induction Motor Endring Design Features for High Speed Applications  

Microsoft Academic Search

This paper presents advancements in induction motor endring design to overcome mechanical limitations and extend the operating speed range and joint reliability of induction machines. A novel endring design met the challenging mechanical requirements of this high speed, high temperature, power dense application, without compromising electrical performance. Analysis is presented of the advanced endring design features including a non uniform

Matthew Caprio; Vasileios Lelos; John Herbst; Jim Upshaw

2005-01-01

403

Advanced motor and motor control development  

NASA Astrophysics Data System (ADS)

The capability of operating a high speed permanent magnet brushless dc motor with electronic controller over a wide load and speed range was demonstrated. A centrifugal pump was used as the loading mechanism and hydraulic fluid was pumped in simulation of an aircraft engine fuel pump requirement. A motor speed of 45,000 rpm was reached and a maximum output of 68.5 hp was demonstrated. The response of the system to step commands for speed change was established. Reduction of size and weight of electronic control was established as a primary future goal. The program system concept with minor rotating machine improvements is viable for high speed drive applications up to 100-hp level.

Wuertz, Kenneth L.; Beauchamp, Edward D.

1988-08-01

404

Comparative evaluation of power factor impovement techniques for squirrel cage induction motors  

SciTech Connect

This paper describes the results obtained from a series of tests of relatively simple methods of improving the power factor of squirrel-cage induction motors. The methods, which are evaluated under controlled laboratory conditions for a 10-hp, high-efficiency motor, include terminal voltage reduction; terminal static capacitors; and a floating'' winding with static capacitors. The test results are compared with equivalent circuit model predictions that are then used to identify optimum conditions for each of the power factor improvement techniques compared with the basic induction motor. Finally, the relative economic value, and the implications of component failures, of the three methods are discussed.

Spee, R.; Wallace, A.K. (Oregon State Univ., Corvallis, OR (United States). Dept. of Electrical and Computer Engineering)

1992-04-01

405

Soft Computing Application in Fault Detection of Induction Motor  

SciTech Connect

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.

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

2010-10-26

406

Soft Computing Application in Fault Detection of Induction Motor  

NASA Astrophysics Data System (ADS)

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.

Konar, P.; Puhan, P. S.; Chattopadhyay, P.

2010-10-01

407

Improved SCR ac-motor controller for battery-powered urban electric vehicles  

Microsoft Academic Search

An electric vehicle propulsion system controller which uses an ac induction electric motor as the electrical to mechanical energy conversion unit was designed and developed. The contract program was to design and test 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

Latos

1982-01-01

408

Improved Transistorized AC Motor Controller for Battery Powered Urban Electric Passenger Vehicles.  

National Technical Information Service (NTIS)

The objectives of this program for an improved ac motor controller for battery powered urban electric passenger vehicles were: the design, fabrication, test, evaluation and cost analysis of an engineering model controller for an ac induction motor drive s...

S. C. Peak

1982-01-01

409

Improved SCR AC-Motor Controller for Battery-Powered Urban Electric Vehicles.  

National Technical Information Service (NTIS)

An electric vehicle propulsion system controller which uses an ac induction electric motor as the electrical to mechanical energy conversion unit was designed and developed. The contract program was to design and test an improved ac motor controller, whic...

T. S. Latos

1982-01-01

410

Power control for ac motor  

NASA Astrophysics Data System (ADS)

A motor controller employing a triac through which power is supplied to a motor is described. The open circuit voltage appearing across the triac controls the operation of a timing circuit. This timing circuit triggers on the triac at a time following turn off which varies inversely as a function of the amplitude of the open circuit voltage of the triac.

Dabney, R. W.

1984-12-01

411

Power Control for AC Motor.  

National Technical Information Service (NTIS)

A motor controller employing a triac through which power is supplied to a motor and wherein the open circuit voltage appearing across the triac controls the operation of a timing circuit which triggers on the triac at a time following turn off which varie...

R. W. Dabney

1983-01-01

412

High-Performance Induction Motor Drive System Using a PWM Inverter  

Microsoft Academic Search

A high-performance speed control system for cage induction motors is described which utilizes a PWM inverter. The effects of primary current coincidence and machine constant variation on system characteristics such as response time, torque precision, and operating noise were investigated. Based on the results obtained, new control methods have been devised; one varies the gain of the current controller in

Hiroshi Nagase; Yasuo Matsuda; Kazuo Ohnishi; Hisakazu Ninomiya; Toshio Koike

1984-01-01

413

On-Line Efficiency Optimization of a Variable Frequency Induction Motor Drive  

Microsoft Academic Search

The problems associated with the implementation of an optimal efficiency controller in variable frequency induction motor drives are examined. A simple method for minimizing, on-line, the global system losses is presented. This method is based on the adaptive control of the rotor flux in a field-oriented drive system. The effectiveness of this control strategy is verified using digital simulation.

Daniel S. Kirschen; Donald W. Novotny; Thomas A. Lipo

1985-01-01

414

Identification of Plant Model of Linear Induction Motors for Traction System  

NASA Astrophysics Data System (ADS)

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.

Nozaki, Yuichiro; Koseki, Takafumi

415

An On-line Distributed Induction Motor Monitoring System Based-on ARM and CAN Bus  

Microsoft Academic Search

This paper presents an on-line distributed induction motor monitoring system based-on the ARM (Advanced RISC Machines), which is integrated with the embedded and CAN (Controller Area Network) bus technologies. The hardware structure of the system with the ARM microprocessor S3C2410X and CAN bus controller MCP2510 is introduced; the accomplishment of software of motor on-line monitoring system is also described. Compared

Chenhui Wang; Yukun Liu; Liwei Guo; Yong Yue; Carsten Maple

2011-01-01

416

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

Microsoft Academic Search

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

Slobodan N. Vukosavic; Emil Levi

2003-01-01

417

Autonomous wind-generated electricity for induction motors  

SciTech Connect

A wind turbine with variable-voltage, variable-frequency electrical output was used to power resistive loads and induction motors in an autonomous system. The AC system was selected because AC motors, in multiple kilowatt sizes, can be more practical than DC motors. A wind turbine which produces electricity has a lower overall efficiency than a system producing mechanical power but offers more flexibility in adapting to varying loads and in locating the wind turbine near the load. A permanent magnet alternator designed to operate with a rotor speed from 70 to 150 r/min was first operated in the laboratory. The frequency of the output varied from 30 to 65Hz, while the voltage changed from 85 to 218 V, resulting in voltage to frequency ratios (V/f) from 2.6 to 3.3 with various loads. The alternator, with a maximum rated output of 9kW, provided power to resistive load or induction motor loads. The tests revealed that standard three-phase, 240 V, 60 Hz, AC induction motors will operate with any input of 85 V and 30 Hz. A motor temperature rise of 40/sup 0/C above ambient was not exceeded when power was supplied by the alternator to a 7.6 kW motor. System efficiencies were nearly equivalent to those obtained with utility power, even though the V/f was below that calculated from the motor's nameplate. The wind energy conversion system (WECS) was then operated in windspeeds of 3.5 m/s or greater. The WECS was capable of providing power to satisfactorily operate induction motors in an autonomous system.

Vosper, F.C.; Clark, R.N.

1988-08-01

418

Advances in brushless motor control  

Microsoft Academic Search

Brushless DC servomotors have been replacing brush type motors in machine tool and robotics applications over the last number of years. The well known advantages of brushless over brush motors include improved reliability, higher power to weight ratios, and an overall better dynamic performance. This paper briefly describes the evolution in the control of brushless drive systems which has been

Aengus Murray; Paul Kettle; Finbarr Moynihan

1997-01-01

419

Artificial immune based support vector machine algorithm for fault diagnosis of induction motors  

Microsoft Academic Search

The use of induction motors is widespread in industry. Many researchers have studied the condition monitoring and detecting the faults of induction motors at an early stage. Early detection of motor faults results in fast unscheduled maintenance. In this study, a new artificial immune based support vector machine algorithm is proposed for fault diagnosis of induction motors. Support vector machines

I. Aydin; M. Karakose; E. Akin

2007-01-01

420

Identification of Thermally Safe Load Cycles for An Induction Motor Position Servo  

Microsoft Academic Search

Advances in the available performance of induction motor-inverter systems permit these drive systems to meet progressively more demanding performance criteria. High-performance servos require the induction motor to produce high torque and power. The severely repetitive load cycles stress the motor's insulation with high operating temperatures. The traditional rating of the induction motor based on ac line operation is not useful

R. Krishnan; Frank C. Doran; Thomas S. Latos

1987-01-01

421

Comparison of Linear Synchronous and Induction Motors.  

National Technical Information Service (NTIS)

A Propulsion Trade Study was conducted as part of the Colorado Maglev Project of FTA's Urban Maglev Technology Development Program to identify and evaluate prospective linear motor designs that could potentially meet the system performance requirements of...

E. Masada R. J. Kaye

2004-01-01

422

Stator Current and Motor Efficiency as Indicators for Different Types of Bearing Faults in Induction Motors  

Microsoft Academic Search

This paper proposes a new approach to use stator current and efficiency of induction motors as indicators of rolling-bearing faults. After a presentation of the state of the art about condition monitoring of vibration and motor current for the diagnostics of bearings, this paper illustrates the experimental results on four different types of bearing defects: crack in the outer race,

Lucia Frosini; Ezio Bassi

2010-01-01

423

Gli function is essential for motor neuron induction in zebrafish.  

PubMed

The Gli family of zinc-finger transcription factors mediates Hedgehog (Hh) signaling in all vertebrates. However, their roles in ventral neural tube patterning, in particular motor neuron induction, appear to have diverged across species. For instance, cranial motor neurons are essentially lost in zebrafish detour (gli1(-)) mutants, whereas motor neuron development is unaffected in mouse single gli and some double gli knockouts. Interestingly, the expression of some Hh-regulated genes (ptc1, net1a, gli1) is mostly unaffected in the detour mutant hindbrain, suggesting that other Gli transcriptional activators may be involved. To better define the roles of the zebrafish gli genes in motor neuron induction and in Hh-regulated gene expression, we examined these processes in you-too (yot) mutants, which encode dominant repressor forms of Gli2 (Gli2(DR)), and following morpholino-mediated knockdown of gli1, gli2, and gli3 function. Motor neuron induction at all axial levels was reduced in yot (gli2(DR)) mutant embryos. In addition, Hh target gene expression at all axial levels except in rhombomere 4 was also reduced, suggesting an interference with the function of other Glis. Indeed, morpholino-mediated knockdown of Gli2(DR) protein in yot mutants led to a suppression of the defective motor neuron phenotype. However, gli2 knockdown in wild-type embryos generated no discernable motor neuron phenotype, while gli3 knockdown reduced motor neuron induction in the hindbrain and spinal cord. Significantly, gli2 or gli3 knockdown in detour (gli1(-)) mutants revealed roles for Gli2 and Gli3 activator functions in ptc1 expression and spinal motor neuron induction. Similarly, gli1 or gli3 knockdown in yot (gli2(DR)) mutants resulted in severe or complete loss of motor neurons, and of ptc1 and net1a expression, in the hindbrain and spinal cord. In addition, gli1 expression was greatly reduced in yot mutants following gli3, but not gli1, knockdown, suggesting that Gli3 activator function is specifically required for gli1 expression. These observations demonstrate that Gli activator function (encoded by gli1, gli2, and gli3) is essential for motor neuron induction and Hh-regulated gene expression in zebrafish. PMID:15890329

Vanderlaan, Gary; Tyurina, Oksana V; Karlstrom, Rolf O; Chandrasekhar, Anand

2005-06-15

424

A Novel Method to Estimate the Rotor Resistance of the Induction Motor Using Support Vector Machines  

Microsoft Academic Search

Modern indirect vector control based drives of the squirrel cage induction motor (SCIM) have a main weakness in the true value of the rotor time constant is always unknown, which is used by the control block to know the exact position of the rotor flux and locate the synchronous d-q axes correctly. The main parameter affecting the rotor time constant

Sergio Villazana; Antonino Caralli; Cesar Seijas; Carlos Villanueva

2006-01-01

425

Study of Parameter Sensitivity in High-Performance Inverter-Fed Induction Motor Drive Systems  

Microsoft Academic Search

Vector control schemes are used in inverter-fed induction motor drives to obtain high performance. Crucial to the success of the vector control scheme is the knowledge of the instantaneous position of the rotor flux. The position of the rotor flux is measured in the direct scheme and estimated in the indirect schemes. Since the estimation of the flux position requires

R. Krishnan; Frank C. Doran

1987-01-01

426

Recurrent Fuzzy Neural Network Using Genetic Algorithm for Linear Induction Motor Servo Drive  

Microsoft Academic Search

A recurrent fuzzy neural network (RFNN) using genetic algorithm (GA) is proposed to control the mover of a linear induction motor (LIM) servo drive for periodic motion in this paper. First, the dynamic model of an indirect field-oriented LIM servo drive is derived. Then, an on-line training RFNN with backpropagation algorithm is introduced as the tracking controller. Moreover, to guarantee

F. J. Lin; P. K. Huang

2006-01-01

427

Transient effects in application of PWM inverters to induction motors  

SciTech Connect

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 lengths and rise times and are presented graphically. Simulations confirm potential problems with long cables and short rise times.

Persson, E. (Electrical and Control Systems Dept., H.A. Simons, Ltd., Vancouver, V6B 2J6 (Canada))

1992-10-01

428

Improved neural network model for induction motor design  

SciTech Connect

An improved model of the artificial neural network for analysis and design of induction motors is presented. Parameters of the machine equivalent circuit are calculated using finite element method for a given motor geometry. The training of the neutral network model is based on a decoupled system between geometrical variables and circuit parameters. This method efficiently improved the training and performance of the neural network model which can be used to predict machine performance and solve design optimization problems.

Idir, K.; Chang, L. [Univ. of New Brunswick, Fredericton, New Brunswick (Canada). Dept. of Electrical Engineering; Dai, H. [Atlantic Nuclear Services Ltd., Fredericton, New Brunswick (Canada)

1998-09-01

429

High phase order induction motors; part II-experimental results  

SciTech Connect

Experimental tests have been carried out on a small induction motor connected for six phases and for nine phases. These include torque measurements over the entire speed range and load tests with balanced source and with one phase open. Some of the machine impedances, including sequence impedances, were measured and these generally agree with predicted values. The motor was subjected to source voltages having harmonics and the measured currents show good agreement with theoretical values based on the analysis in a companion paper.

Klingshirn, E.A.

1983-01-01

430

Composite rotor for high-speed induction motors  

Microsoft Academic Search

In order to improve the dynamic characteristics of 3-phase AC induction motors, the squirrel cage rotor for a high speed built-in type motor spindle system was designed and manufactured with powder containing epoxy composite material and an aluminum squirrel cage. The Young’s modulus, coefficient of thermal expansion (CTE), resistivity and magnetic permeability of the epoxy containing ferrite powder and iron

Seung Hwan Chang; Dai Gil Lee; Jin Kyung Choi

2000-01-01

431

Transistorized PWM Inverter-Induction Motor Drive System  

Microsoft Academic Search

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

Steven C. Peak; Allan B. Plunkett

1983-01-01

432

Induction motor rotor temperature estimation using superheterodyne receivers  

Microsoft Academic Search

A rotor temperature estimator is proposed in this paper for line-connected squirrel-cage induction motors during dynamic or steady-state operations. The method utilizes a pipelined architecture with two superheterodyne receivers that operate in parallel on a complex current vector. The first superheterodyne receiver detects motor speed by extracting an instantaneous rotor slot harmonic frequency from the complex current vector. The second

Zhi Gao; Roy S. Colby; Larry Turner

2011-01-01

433

Intelligent motion control for linear piezoelectric ceramic motor drive  

Microsoft Academic Search

Since the dynamic characteristics of a linear piezoelectric ceramic motor (LPCM) are highly nonlinear and time varying, it is difficult to design a suitable motor drive and position controller that realizes accurate position control at all time. This study investigates a double-inductance double-capacitance (LLCC) resonant driving circuit and a sliding-mode fuzzy-neural-network control (SMFNNC) system for the motion control of an

Rong-jong Wai; Jeng-dao Lee

2004-01-01

434

Bearing Fault Detection in Induction Motor-Gearbox Drivetrain  

NASA Astrophysics Data System (ADS)

The main contribution in the hereby presented paper is to investigate the fault detection capability of a motor current signature analysis by expanding its scope to include the gearbox, and not only the induction motor. Detecting bearing faults outside the induction motor through the stator current analysis represents an interesting alternative to traditional vibration analysis. Bearing faults cause changes in the stator current spectrum that can be used for fault diagnosis purposes. A time-domain simulation of the drivetrain model is developed. The drivetrain system consists of a loaded single stage gearbox driven by a line-fed induction motor. Three typical bearing faults in the gearbox are addressed, i.e. defects in the outer raceway, the inner raceway, and the rolling element. The interaction with the fault is modelled by means of kinematical and mechanical relations. The fault region is modelled in order to achieve gradual loss and gain of contact. A bearing fault generates an additional torque component that varies at the specific bearing defect frequency. The presented dynamic electromagnetic dq-model of an induction motor is adjusted for diagnostic purpose and considers such torque variations. The bearing fault is detected as a phase modulation of the stator current sine wave at the expected bearing defect frequency.

Cibulka, Jaroslav; Ebbesen, Morten K.; Robbersmyr, Kjell G.

2012-05-01

435

Improved magnetic field analysis of induction motor models  

SciTech Connect

This paper presents an improved magnetic field analysis for induction motor models. In the analysis with the conventional numerical modeling of magnetic materials, the vector relations between the flux density and the field intensity under a rotating field cannot be expressed exactly. In this paper, the authors derived the tensor magnetic reluctivity from the data measured with two-dimensional measurement method. This expression is applied to analyze a three-phase induction motor model core. The examples show that the calculated results obtained by the new method are different from those of the conventional modeling.

Enokizono, Masato; Sadanaga, Yuichiro [Oita Univ. (Japan)

1998-09-01

436

Improved Transistorized AC Motor Controller for Battery Powered Urban Electric Passenger Vehicles.  

National Technical Information Service (NTIS)

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 requirem...

S. C. Peak

1982-01-01

437

Studies on the use of conventional induction motors as self-excited induction generators  

Microsoft Academic Search

The suitability of using a normal three-phase induction motor as a capacitor self-excited induction generator (SEIG) is illustrated. The thermal limit of the stator windings being the limiting factor, the capacity of the SEIG is determined. The steady-state performance of such induction generators, maintaining a constant terminal voltage, is analyzed under resistive and reaction loads. Typical experimental results are also

S. S. Murthy; B. P. Singh; C. Nagamani; K. V. V. Satyanarayana

1988-01-01

438

Simulation and modelling of a variable gain PI controller for speed control of a direct torque neuro fuzzy controlled induction machine drive  

Microsoft Academic Search

This paper presents an original variable gain PI (VGPI) controller for speed control of a direct torque neuro fuzzy controlled (DTNFC) induction motor drive. First, a VGPI speed controller is designed to replace the classical PI controller in a conventional direct torque controlled induction motor drive. Its simulated performances are then compared to those of a classical PI controller. Then,

A. Miloudi; E. A. AI Radadi; A. Draou; Y. Miloud I

2004-01-01

439

Real-time estimation of the parameters and fluxes of induction motors  

Microsoft Academic Search

The paper presents a new method for the real-time estimation of the parameters and fluxes of induction motors. The procedure is potentially useful for the design of self-commissioning drives, i.e., drives that can adjust controller parameters automatically for a wide range of motors and loads. Another possible application is for the detection of failures. In their recursive form, the algorithms

Jennifer Stephan; Marc Bodson; J. Chiasson

1994-01-01

440

Alternatives for assessing the electrical integrity of induction motors  

SciTech Connect

The early detection of motor deterioration can increase plant availability and safety, and maintenance personnel often utilize periodic inspection methods such as insulation resistance testing to accomplish this; for very large and crucial motors, expensive and sophisticated monitoring procedures are sosmetimes implemented, although such applications are rare. The paper presents two alternatives to traditional procedures that are appropriate for detecting stator-winding deterioration in three-phase induction motors of the sizes commonly found in the process industries, based on the results of a recently completed research project. The use of an effective-negative-sequence impedance as a predictor of incipient failure is recommended.

Kohler, J.L. (Pennsylvania State Univ., University Park, PA (United States). Dept. of Mineral Engineering); Sottile, J. (Kentucky Univ., Lexington, KY (United States). Dept. of Mining Engineering); Trutt, F.C.

1992-10-01

441

HTS axial flux induction motor with analytic and FEA modeling  

NASA Astrophysics Data System (ADS)

This paper presents a high-temperature superconductor (HTS) axial-flux induction motor, which can output levitation force and torque simultaneously. In order to analyze the character of the force, analytic method and finite element method are adopted to model the motor. To make sure the HTS can carry sufficiently large current and work well, the magnetic field distribution in HTS coil is calculated. An effective method to improve the critical current of HTS coil is presented. Then, AC losses in HTS windings in the motor are estimated and tested.

Li, S.; Fan, Y.; Fang, J.; Qin, W.; Lv, G.; Li, J. H.

2013-11-01

442

A versatile stepping motor controller for systems with many motors  

SciTech Connect

A versatile system for controlling beamlines or complex experimental setups is described. The system as currently configured can control up to 32 motors, with all motors capable of full speed operation concurrently. There are 2 limit switch inputs for each motor, and a further input to accept a reference position marker. The motors can be controlled via a front panel keyboard with display, or by a host computer over an IEEE-488 interface. Both methods can be used together if required. There is an emergency stop'' key on the front panel keyboard to stop the motion of all motors without losing track of the motors' position. 3 refs., 4 figs., 1 tab.

Feng, S.K.; Siddons, D.P.

1989-01-01

443

Speed control of a DC series motor using an integral-cycle controlled single triac  

SciTech Connect

The speed control of a dc series motor using an integral-cycle controlled triac together with a bridge rectifier is studied. The triac is connected in series with one of the motor ac supply lines. Computer results for the motor dynamic and steady-state performance characteristics are presented. The saturation in the magnetic circuit, the iron losses, the mechanical losses and the variation of the motor self inductance with the armature current are considered in the digital simulation of the motor model. The validity of the mathematical model is checked experimentally. A microprocessor aided measuring circuit is used to measure the motor performances.

Fetih, N.H.; Abdel-Raheem, G.M.; Girgis, G.A. (Electr. Eng. Dept. Assiut Univ., Assiut (EG))

1988-09-01

444

Controller design for servo motor  

Microsoft Academic Search

The objective of this paper is to design a controller for servo motor in discrete-time systems. The effect of sampling time on the proposed design will further discussed. Real-time data gained from the experimental is used to obtain the transfer function to design the PID controller. In order to get the optimal value of PID controller, ARX model structure was

M. M. Kamal; N. Mamat

2009-01-01

445

Minimization and identification of conducted emission bearing current in variable speed induction motor drives using PWM inverter  

Microsoft Academic Search

The recent increase in the use of speed control of ac induction motor for variable speed drive using pulse width modulation\\u000a (PWM) inverter is due to the advent of modern power electronic devices and introduction of microprocessors. There are many\\u000a advantages of using ac induction motor for speed control applications in process and aerospace industries, but due to fast\\u000a switching

A. Ramachandran; M. Channa Reddy; Ranjan Moodithaya

2008-01-01

446

ROTOR RESISTANCE ESTIMATION FOR CURRENT-FED INDUCTION MOTORS  

Microsoft Academic Search

In this paper a new algorithm for estimating the rotor resistance of current-fed induction motors is presented. The proposed method does not require persistent excitation and achieves asymptotic convergence even in the case of zero rotor speed and\\/or low torque. However, it does require measurement of the rotor speed and ?ux. To make the scheme practically feasible, a method for

Dimitrios Karagiannis; Alessandro Astolfl

447

On-line rotor resistance estimation for induction motors  

Microsoft Academic Search

A novel estimation algorithm which provides online exponential estimation of rotor resistance for induction motors in physical operating conditions (non-zero electrical torque) is given. The convergence is not influenced by the value assumed by rotor speed, including zero speed. The algorithm also provides flux estimates and may be viewed as an adaptive observer. Some simulations are reported which show satisfactory

R. Marino; S. Peresada; P. Tomei

1994-01-01

448

Exponentially convergent rotor resistance estimation for induction motors  

Microsoft Academic Search

A new estimation algorithm is presented which provides exponential estimation of rotor resistance for induction motor drives in physical operating conditions. The exponential convergence is not influenced by the value assumed by rotor speed, including zero speed. The algorithm also provides flux estimates and may be viewed as an adaptive observer. Experimental results show good performance with a sampling time

Riccardo Marino; Sergei Peresada; Patrizio Tomei

1995-01-01

449

Fault classification performance of induction motor bearing using AI methods  

Microsoft Academic Search

This paper presents an approach of intelligent fault classification of induction motor bearing (IMB) using several artificial intelligent (AI) methods. The most common AI methods are FeedForward Neural Network (FFNN), Elman Network (EN), Radial Basis Function Network (RBFN) and Adaptive Neuro-Fuzzy Inference System (ANFIS). The data of IMB fault is obtained from Case Western Reserve University website in form of

Abd Kadir Mahamad; Takashi Hiyama

2010-01-01

450

Five level GTO inverters for large induction motor drives  

Microsoft Academic Search

The use of a five-level GTO (gate turn-off thyristor) voltage sourced inverter for large induction motor drives is investigated. The advantages of such a drive are that single GTO thyristors may be used at each level, thereby avoiding the need for series connection of the thyristors. The thyristors are well protected from overvoltages by the clamping action of the DC

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

1993-01-01

451

Polyphase Induction Motor Performance and Losses on Nonsinusoidal Voltage Sources  

Microsoft Academic Search

Induction motors excited with static frequency converters almost invariably are subjected to nonsinusoidal voltage waveforms, and the presence of time harmonics in the applied voltage results in currents at the harmonic frequencies. These currents result in additional and sometimes rather large losses. A method for calculating these harmonic currents and losses is presented, and experimental data are included to substantiate

Eugene Klingshirn; Howard Jordan

1968-01-01

452

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

453

Stability Analysis of a Rectifier-Inverter Induction Motor Drive  

Microsoft Academic Search

A stability study of a rectifier-inverter induction motor drive system is performed by neglecting the harmonic content of the stator voltages and applying Nyquist stability criterion to the small- displacement equations obtained by linearization about an operating point. This investigation reveals that system instability can occur over a wide speed range if the system parameters are improperly selected. It appears

Thomas Lipo; Paul Krause

1969-01-01

454

Induction Motor Squirrel Cage Rotor Winding Thermal Analysis  

Microsoft Academic Search

Induction motor squirrel cage rotor winding performance operating range and reliability are influenced by the temperature of these windings and the temperature differences which occur within the windings, and between the windings and other parts of the rotor structure. These temperature responses have formed a basis for protective devices commonly in use to protect the winding from damage. This paper

J. W. Griffith; R. M. McCoy; D. K. Sharma

1986-01-01

455

Induction Motor Operation With Non-Sinusoidal Impressed Voltages  

Microsoft Academic Search

The usual procedure in considering the operation of induction motors has been to neglect the effect of harmonics. Although in most instances this gives results which are sufficiently accurate, the question of how much these effects are or how much is being neglected has yet to be answered in electrical engineering literature. In this paper an attempt is made to

L. A. Doggett; E. R. Queer

1929-01-01

456

Demonstration of Lenz's Law with an Induction Motor  

ERIC Educational Resources Information Center

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.

Kraftmakher, Yaakov

2005-01-01

457

A New Longitudinal End Effect Factor for Linear Induction Motors  

Microsoft Academic Search

The longitudinal end effect in a linear induction motor (LIM) is analysed assuming two travelling magnetic flux density waves in the airgap: the wave travelling with synchronous velocity and the wave representing end effect [1]. A simple equation for the end effect factor which modifies the airgap EMF is obtained, and a simple equivalent circuit incorporating the end effect factor

J. F. Gieras; G. E. Dawson; A. R. Eastham

1987-01-01

458

Analytical calculation of the switched reluctance motor's unaligned inductance  

Microsoft Academic Search

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

Arthur Radun

1999-01-01

459

New peculiar approach to resource economies in induction motor design  

Microsoft Academic Search

At the design stage of modern induction motors (IM) the potentialities to increase both electrical and magnetic loads on the basis of available materials turned out to be exhausted. Given the available approach to design of electrical machines of different kinds of IM, including all parameters, are considered to be determinate. The investigations carried out in production technology showed that

O. P. Muravlyov; O. O. Muravlyova

1999-01-01

460

Optimum goodness criterion for linear-induction-motor design  

Microsoft Academic Search

The present paper introduces the concept of the realistic goodness factor for the study of linear induction motors. By appropriate coefficients, this factor takes into account the airgap leakage, the secondary-sheet skin effect, and transverse edge effects. Approximations involved in obtaining the realistic goodness factor are outlined, and it is shown that the end effect can be expressed as a

I. Boldea; S. A. Nasar

1976-01-01

461

Computer-Aided Synthesis and Optimization of Induction Motor Design  

Microsoft Academic Search

A method of computer-aided design of induction motors is proposed. Synthesis of a feasible design is achieved by use of the digital computer operating in an interactive mode, the objective being to utilize both man and machine to their best advantage. Optimization of the feasible design is accomplished automatically by using a nonlinear function maximization algorithm. The method has been

COLIN E. TINDALL; PETER A. J. CALVERT

1977-01-01

462

Optimization Of Pplyphase Induction Motor Design: A Nonlinear Programming Approach  

Microsoft Academic Search

The problem of optimization of induction motor design is tackled as a nonlinear programming problem. The objective function or the cost function is formed taking only the material cost into account. The specifications like pull out torque, starting torque etc. are put as constraint functions. These functions are expressed in terms of important dimensions of the machine which are assumed

R. Ramarathnam; B. G. Desai

1971-01-01

463

Supply-pollution (SP) loss in induction motor  

SciTech Connect

Power supply in the field is often noticeably polluted with various degrees of harmonics content and unbalanced voltages. In order to assess the energy loss caused by the supply pollution in the widely used induction motors, a method based on the air-gap torque power is discussed.

Hsu, J.S.

1995-07-01

464

A low cost linear induction motor for laboratory experiments  

Microsoft Academic Search

In this paper we present a linear induction motor (LIM) prototype for education. LIMs allow easy identification and study of the different concepts and parameters of the electromagnetic circuit that they have in common with other types of electrical machine. Some experiments are presented that highlight the proposed approach. There is a wide bibliography for the diVerent applications of linear

J. Atencia; A. Garcia Rico; J. Florez

465

Demonstration of Lenz's Law with an Induction Motor  

ERIC Educational Resources Information Center

|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.|

Kraftmakher, Yaakov

2005-01-01

466

Speed estimate for maglev train based on linear induction motor  

Microsoft Academic Search

Maglev train is a new vehicle without support wheel and its movement speed is gained through a special measure equipment. The paper proposes a neural network arithmetic for the maglev train speed estimator which combines characteristics of its traction linear induction motor. The result of a dynamic simulation experiment shows that real speed measure is near to theory calculation. This

Shaoke Liu; Dengwu Wei; Guirong Chen

2008-01-01

467

Fuzzy logic controllers for electric motors and wind turbines. Report for October 1996-April 1997  

SciTech Connect

The paper discusses a precision laboratory test facility that has been assempbled to test the performance of two fuzzy-logic based controllers for electric motors and wind turbines. Commercial induction motors up to 10 hp (7.46 kWe) in motors and equipped with adjustable-speed drives (ASDs) were used to test the motor optimizers.

Spiegel, R.J.

1997-04-01

468

An analysis of the relationship between induction motor current and shaft speed fluctuations  

Microsoft Academic Search

For induction motors, motor shaft speed variations accompany motor load torque variations and motor torque variations. Hence, shaft speed fluctuation detection can serve as a warning of undesirable motor load conditions. This paper presents a theoretical foundation for the relationship between motor shaft speed fluctuations and stator current fluctuations when the shaft speed is perturbed by any cause. In addition,

C. H. Nowlin

1992-01-01

469

Universal adaptive torque control for PM motors for field-weakening region operation  

SciTech Connect

The invention includes a motor controller and method for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by, among other things, receiving a torque command, determining a normalized torque command by normalizing the torque command to a characteristic current of the motor, determining a normalized maximum available voltage, determining an inductance ratio of the motor, and determining a direct-axis current based upon the normalized torque command, the normalized maximum available voltage, and the inductance ratio of the motor.

Royak, Semyon (Beachwood, OH); Harbaugh, Mark M. (Richfield, OH); Breitzmann, Robert J. (South Russel, OH); Nondahl, Thomas A. (Wauwatosa, WI); Schmidt, Peter B. (Franklin, WI); Liu, Jingbo (Milwaukee, WI)

2011-03-29

470

Rotor resistance estimation using fuzzy logic for high performance induction motor drives  

Microsoft Academic Search

This paper presents a method of estimation for the rotor resistance in an indirect vector-controlled induction motor drive. First, the influence of the rotor resistance deviation to the system performance is studied based on simulation and experimentation approach. The design of a rotor resistance estimator using the fuzzy logic principle is then described. The effectiveness of the proposed rotor resistance

Minh Ta-Cao; Hoang Le-Huy

1998-01-01

471

Stator and rotor resistance observers for induction motor drive using fuzzy logic and artificial neural networks  

Microsoft Academic Search

This paper presents a new observer for the rotor resistance of an indirect vector controlled induction motor drive using artificial neural networks supplemented by a fuzzy logic based stator resistance observer. The error between the rotor flux linkages based on a neural network model and a voltage model is back propagated to adjust the weights of the neural network model

Baburaj Karanayil; Muhammed Fazlur Rahman; Colin Grantham

2005-01-01

472

New General MRAS Adaptive Scheme to Estimate Stator and Rotor Resistance of Induction Motors  

Microsoft Academic Search

In this paper, a new adaptive scheme for simultaneous on-line stator and rotor resistance estimation of induction motors is proposed. This method is based on the adaptive control theory of model reference adaptive system (MRAS) approach with Luenberger observer. And the stability of the observer with stator and rotor resistance estimation from the proposed adaptive scheme is proved by the

Han Li; Wen Xuhui; Chen Guilan

2006-01-01

473

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

Microsoft Academic Search

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

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

2006-01-01

474

Analysis of a voltage regulator for a two-phase induction motor drive  

Microsoft Academic Search

This paper presents the modelling and experimental studies, underlying the analysis of a novel voltage regulator which is used as a supply for a variable speed two-phase induction motor drive. A median point inverter with full logic control is used as a voltage regulator. The machine stator windings have a special distribution. This voltage regulator drive achieves a wide speed

M. Popescu; E. Demeter; D. Micu; V. Navrapescu; T. Jokinen

1999-01-01

475

DSP Based Torque Estimation in Three-phase Cage Induction Motors  

Microsoft Academic Search

The knowledge of the instantaneous electromagnetic torque produced by an induction motor is highly desirable in innumerous applications and is required in several closed loop control strategies. Direct measurement has shown not to be convenient\\/feasible due to the need of external sensors and special installation arrangements and costs involved. The way is to estimate the torque, which in turn depends

D. A. Andrade; A. W. F. Silveira; P. B. Severino; T. S. Tavares

2007-01-01

476

Speed estimation of an induction motor drive using an optimized extended Kalman filter  

Microsoft Academic Search

This paper presents a novel method to achieve good performance of an extended Kalman filter (EKF) for speed estimation of an induction motor drive. A real-coded genetic algorithm (GA) is used to optimize the noise covariance and weight matrices of the EKF, thereby ensuring filter stability and accuracy in speed estimation. Simulation studies on a constant V\\/Hz controller and a

K. L. Shi; T. F. Chan; Y. K. Wong; S. L. Ho

2002-01-01

477

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

Microsoft Academic Search

Many applications involving induction motors that are controlled using variable frequency drives (VFDs) 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 fast stopping makes use of brake resistors in series with a power semiconductor switch. The switch-resistor combination (brake-unit)

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

2000-01-01

478

Thermal modelling for an induction motor  

NASA Astrophysics Data System (ADS)

The authors of this paper intend to achieve the study of the thermal behaviour in permanent rate of an asynchronous motor with a wounded rotor of a rated power of 4kW. 66 thermocouples have been settled in the stator at different places like the centers and the bottoms of the windings or the middle of the yoke. A design has been realized thanks to the magnetostatic modulus of the computation software with the finite elements method Flux2d converted in a resolution tool of the heat equation. Another originality of this study is to introduce areas including a contact thermal resistance phenomenon in some places of the motor to characterize the motor thermophysical parameters and to obtain the experimentation-calculation convergence. Les auteurs de cet article se proposent de réaliser l'étude du comportement thermique en régime permanent d'un moteur asynchrone de 4kW à rotor bobiné. 66 thermocouples ont été positionnés en différents lieux du stator tels que les milieux des bobinages, les fonds d'encoches ou encore le milieu des tôles. Un modèle a été réalisé à l'aide du logiciel de calculs magnétostatiques par éléments finis Flux2d converti en un outil de résolution de l'équation de la chaleur. Une autre originalité de cette étude a été d'introduire en certains endroits du moteur des zones où la notion de résistance thermique de contact est particulièrement importante. L'introduction de paramètres thermophysiques les caractérisant s'est avérée nécessaire pour obtenir la convergence expérimentation-simulation.

Glises, R.; Miraoui, A.; Kauffmann, J. M.

1993-09-01

479

Selected Methods in Angular Rotor Speed Estimation for Induction Motor Drives  

Microsoft Academic Search

This paper presents selected methods in angular rotor speed estimation for induction motor drives. Modern control schemes for high-performance drives (e.g. Field Oriented Control, Direct Torque Control) are based on precise knowledge of some physical quantities that are hard to measure or are immeasurable in standard machine (e.g. fluxes). Other quantities needed for control require additional transducers that are expensive

Bartlomiej Ufnalski; Lech M. Grzesiak

2007-01-01

480

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

Microsoft Academic Search

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

Omar Ellabban; Joeri Van Mierlo; Philippe Lataire

2010-01-01

481

Detection of broken rotor bars in induction motors using state and parameter estimation  

Microsoft Academic Search

The detection of broken rotor bars in induction motors is studied. The hypothesis on which detection is based is that the apparent rotor resistance of an induction motor will increase when a rotor bar breaks. Here, the apparent rotor resistance is that in the balanced steady-state single-phase electrical model of an induction motor. To detect broken rotor bars, measurements of

K. Rae Cho; J. H. Lang; S. D. Umans

1992-01-01

482

Filter Design for Estimating Parameters of Induction Motors With Time-Varying Loads  

Microsoft Academic Search

Periodically time-varying loads such as reciprocat- ing compressors produce torque and speed oscillations in grid- connected induction motors. In each compression cycle, the torque and speed oscillations manifest themselves through periodic pulsa- tions in the induction motor's stator currents. In resistance-based rotor temperature tracking and overheating monitoring, low- or bandpass filters are frequently used to estimate induction motor electrical parameters

Zhi Gao; Roy S. Colby; Larry Turner; Benoit Leprettre

2011-01-01

483

Hybrid time-frequency domain analysis for inverter-fed induction motor fault detection  

Microsoft Academic Search

The detection of faults in an induction motor is important as a part of preventive maintenance. Stator current is one of the most popular signals used for utility-supplied induction motor fault detection as a current sensor can be installed nonintrusively. In variable speeds operation, the use of an inverter to drive the induction motor introduces noise into the stator current

T. W. Chua; W. W. Tan; Z.-X. Wang; C. S. Chang

2010-01-01

484

Thermal derating of TEFC induction motors coated or partially flooded by spilled pulp  

Microsoft Academic Search

Induction motors driving the agitators in pulp tanks are affected by the leakage of pulp that coats their inter-fin channels, blocks the air inlets of the fan cover, or partially floods them. This paper presents a complete thermal evaluation of TEFC induction motors during these abnormal conditions. A totally enclosed fan cooled (TEFC) induction motor fitted with 12 thermocouples was

M. A. Valenzuela; M. F. Millar; J. A. Tapia; J. A. Rooks

2004-01-01

485

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

Microsoft Academic Search

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

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

486

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

Microsoft Academic Search

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

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

2007-01-01

487

Using MPSO algorithm to optimize three-phase squirrel cage induction motor design  

Microsoft Academic Search

Improving the efficiency of three-phase squirrel cage induction motors, which are the most energy consuming electric machines in the world, saves much energy. The efficiency can be raised by optimizing the induction motor design. The objective of this paper is mainly to develop a modified particle swarm optimization (MPSO) technique to the three-phase cage induction motor design problem with a

V. P. Sakthivel; S. Subramanian

2011-01-01

488

Comparison of Modern Optimization Techniques with Applications to Single-Phase Induction Motor Design  

Microsoft Academic Search

The need for energy conservation necessitates increased levels of induction motor efficiency. It is therefore important to optimize the efficiency of the induction motor if significant energy savings are to be obtained. To optimize the efficiency, the design of the induction motor has to be chosen appropriately. Here we present a comparative study of the various soft computing techniques and

S. Subramanian; R. Bhuvaneswari

2006-01-01

489

Adaptive motor control in crayfish.  

PubMed

This article reviews the principles that rule the organization of motor commands that have been described over the past five decades in crayfish. The adaptation of motor behaviors requires the integration of sensory cues into the motor command. The respective roles of central neural networks and sensory feedback are presented in the order of increasing complexity. The simplest circuits described are those involved in the control of a single joint during posture (negative feedback-resistance reflex) and movement (modulation of sensory feedback and reversal of the reflex into an assistance reflex). More complex integration is required to solve problems of coordination of joint movements in a pluri-segmental appendage, and coordination of different limbs and different motor systems. In addition, beyond the question of mechanical fitting, the motor command must be appropriate to the behavioral context. Therefore, sensory information is used also to select adequate motor programs. A last aspect of adaptability concerns the possibility of neural networks to change their properties either temporarily (such on-line modulation exerted, for example, by presynaptic mechanisms) or more permanently (such as plastic changes that modify the synaptic efficacy). Finally, the question of how "automatic" local component networks are controlled by descending pathways, in order to achieve behaviors, is discussed. PMID:11124446

Cattaert, D; Le Ray, D

2001-02-01

490

Thermal evaluation for applying TEFC induction motors on short-time and intermittent duty cycles  

Microsoft Academic Search

There are many applications of induction motors to cyclic loading. Most motor manufacturers will perform calculations to obtain motor stator temperature rise for variable-load and cyclic loadings based on data provided. This paper is a report of a testing program on totally enclosed fan-cooled induction motors where temperatures for loadings are measured.

M. Anibal Valenzuela; Paulus V. Verbakel; James A. Rooks

2003-01-01

491

A novel cooling condition monitoring method for induction motors based on particle swarm optimization  

Microsoft Academic Search

Prolonged induction motor operations under impaired cooling conditions can lead to overtemperature of motor components, which leads to accelerated degradation of motor windings, bearings and stator cores. This paper proposes a novel cooling condition monitoring method to detect and classify impaired cooling conditions. A second-order thermal model is used to characterize thermal behaviors of induction motors. Particle swarm optimization is

Yi Du; Pinjia Zhang; Zhi Gao; Thomas G. Habetler

2009-01-01

492

Quantifying Severity of Unbalanced Conditions of Induction Motor Using Wavelet Entropy  

Microsoft Academic Search

Induction motors are widely used machines in industry. These motors are subjected to many unbalanced conditions, which may result in serious consequences on motors and coupled applications. This article presents the simulation of a three-phase induction motor with unbalanced conditions such as unbalanced source voltages, unequal line impedances, unbalanced stator parameters and unbalanced rotor parameters. To investigate different possible scenarios

W. Abu-Elhaija; A. Al-Zaben; M. Alomoush

2006-01-01

493

Three phase AC motor controller  

DOEpatents

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.

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

1984-03-20

494

Universal digital motor speed controllers  

Microsoft Academic Search

Approaches to motor speed control are reviewed. Universal add-on products that are now available for general industrial speed control applications are described, and their benefits are examined. In particular, it is shown how precision speed regulation and multimotor coordinated control can benefit textile manufacturers in stretch\\/draw, metering pump, and coating\\/finishing applications. Ordinary DC, regenerative DC, AC inverters, or clutch controllers

G. A. Gauvin

1989-01-01

495

Advances in vector control of ac motor drives — A review  

Microsoft Academic Search

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

A K Chattopadhyay

1997-01-01

496

Mechanisms of LTP induction in rat motor cortex in vitro.  

PubMed

The motor cortex displays remarkable plasticity in response to changes in sensory and motor experience; however, the synaptic mechanisms underlying functional plasticity are not known. It is believed that synaptic processes that alter the strength of neuronal connections, such as long-term potentiation (LTP), are mechanisms by which synaptic circuits are modified by experience, resulting in functional adaptations. In the present study, we examined the mechanisms of LTP of synaptic responses in layers II/III to vertical (stimulation in layers V/VI) and horizontal (stimulation in layers II/III) inputs, in slices from rat motor cortex. Tetanic stimulation in layers V/VI or II/III induced LTP in 60% of the field potentials (n = 20) and in 73% of the intracellularly recorded postsynaptic potentials (n = 33). LTP was induced in cells with firing patterns characteristic of regular-spiking, fast-spiking, or bursting cells. LTP was expressed, for the most part, in kainate/AMPA receptor-mediated responses; however, potentiation of NMDA receptor-mediated components was also observed. Induction of LTP was prevented when either NMDA receptors or dihydropyridine-sensitive Ca2+ channels (DSCCs) were blocked, although blockade of DSCCs was less effective in preventing LTP induction. Based on the present data and previous LTP studies, we suggest that in many forms of LTP more than one mechanism participates in the induction process. The present findings may be relevant to the synaptic mechanisms underlying functional plasticity in motor cortex. PMID:7580127

Aroniadou, V A; Keller, A

497

A simplified scheme for induction motor condition monitoring  

NASA Astrophysics Data System (ADS)

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) is utilised to generate virtual data that allows to test the proposed technique and foresee the change in the current under different motor conditions. A simple and reliable method for the detection of stator winding failures based on the phase current amplitudes is implemented and tested. The layout has been proved in MATLAB/SIMULINK, with both data from FEM motor simulation program and real measurements. The proposed method has the ability to work with variable speed drives and avoids the detailed spectral analysis of the motor current. This work shows the feasibility of spotting broken rotor bars, eccentricities and inter-turn short-circuit by monitoring the motor currents.

Rodríguez, Pedro Vicente Jover; Negrea, Marian; Arkkio, Antero

2008-07-01

498

Broken-Rotor-Bar Diagnosis for Induction Motors  

NASA Astrophysics Data System (ADS)

Broken rotor bar is one of the commonly encountered induction motor faults that may cause serious motor damage to the motor if not detected timely. Past efforts on broken rotor bar diagnosis have been focused on current signature analysis using spectral analysis and wavelet transform. These methods require accurate slip estimation to localize fault-related frequency. This paper presents a new approach to broken rotor bar diagnosis without slip estimation, based on the ensemble empirical mode decomposition (EEMD) and the Hilbert transform. Specifically, the Hilbert transform first extracts the envelope of the motor current signal, which contains broken rotor fault-related frequency information. Subsequently, the envelope signal is adaptively decomposed into a number of intrinsic mode functions (IMFs) by the EEMD algorithm. Two criteria based on the energy and correlation analyses have been investigated to automate the IMF selection. Numerical and experimental studies have confirmed that the proposed approach is effective in diagnosing broken rotor bar faults for improved induction motor condition monitoring and damage assessment.

Wang, Jinjiang; Gao, Robert X.; Yan, Ruqiang

2011-07-01

499

Minimization Of Energy Losses In Fixed Speed Cyclic Duty Induction Motor Drives  

Microsoft Academic Search

The concept of power factor control, for ennryy conservation, by reducing the vol- tage applied to an unloaded or lightly loaded induction motor was first introduced in late seventies by Frank J. Nola of NASA. Since then a number of prr-.'--:z employing phase control- led thyristors for the control of appl.ied voltage with closed-loop power factor regula- tion have been

M. Safiuddin

1990-01-01

500

Analysis of single phase induction motors using the IODEKICE LOCUS  

SciTech Connect

The paper proposes a simplified and insightful method for use in the analysis of single phase induction motors under running conditions using the IODEKICE LOCUS a unity-diameter impedance circle derived from the Steinmetz Model. The impedance components of the forward and backward circular loci of the motor are represented mathematically by simple rational algebraic equations rather than by the usual products and quotients of complex quantities; the same impedance terms may be represented graphically by readily-visualized orthogonal components of those same circular loci. The result is a unified approach that may be used for a mathematical or graphical analysis of single phase machines.

Skaar, D.L. (San Diego State Univ., San Diego, CA (United States))

1994-05-01