A Novel Voltage Equalization Charger Using Capacitors, Diodes, and an AC Power Source for Energy Storage Cells

Apparatus for conditioning power generated by an energy source includes an inverter for converting a DC input voltage from the energy source to a square wave AC output voltage, and a converter for converting the AC output voltage from the inverter to a sine wave AC output ...

This patent describes an energy management circuit comprising: a laser; an AC input with a maximum power level; a DC source of energy operating in conjunction with the AC input and functioning to provide supplementary power as needed for operation of the laser, when the system ...

A harmonic power flow program applicable to space power systems with sources of harmonic distortion is described. The algorithm is a modification of the Electric Power Research Institute's HARMFLO program which assumes a three phase, balanced, AC system w...

An AC uninterruptible power source is disclosed that provides multiphase power output signals for actual use and a selectable single phase power output signal for use in testing. The AC uninterruptible power source further comprises ...

An ac resonant charger for a capacitive load, such as a pulse forming network (PFN), is provided with a variable repetition rate unrelated to the frequency of a multi-phase ac power source by using a control unit to select and couple the phase of the powe...

Success and failure data of test and emergency starts of emergency ac power sources (diesel generators) at US nuclear power plants were collected and evaluated to estimate diesel generator reliability parameters. A regression analysis of the estimates of ...

... Accession Number : AD0695652. Title : STATIC INVERTER FOR LIGHTWEIGHT, SILENT DC-AC FIELD POWER SOURCE. ...

Contents: Power Loading Data; Power Loading for the Microwave Landing System (MLS); AC Power Loading for MLS Equipment; DC Power Loading for MLS Equipment; AC Electrical Power; DC Electrical Power; AC Load; DC ...

An uninterruptible power supply is described, said power supply comprising: AC input terminal means for receiving a first AC voltage from an AC power source; DC input terminal means for receiving a first DC voltage from a DC power ...

A power source provides continuous ac power by employing a bidirectional converter which interfaces a rechargable dc power storage device with ac mains power and ac loads. The bidirectional converter includes a transformer having ...

A system is described for power conditioning a line of supply of AC power from an AC source to an AC load, comprising: a first array of static power switches mounted across one AC source and ...

A superconduction power storage apparatus includes a superconduction coil for storage and release of electrical energy, and a separately excited thyristor conversion unit having d.c. terminals connected to the said superconduction coil and a.c. terminals connected to an a.c. power source. The ...

The Patent Application Discloses an electrical power conversion system designed to operate on three-phase AC voltage generated by a motor generator, a modification is provided to permit the use of a DC power source to operate same. The power conversion sy...

The optimum generation of electricity from wind power requires that the load (the generator) be matched to the power source (the wind). Some specialists feel that the optimum wind power system will be built around the synchronous ac generators. The advantages, disadvantages, and optimum ...

The electric power distribution systems for spacecraft are compared concentrating on two interrelated issues: the choice between dc and high frequency ac, and the converter/inverter topology to be used at the power source. The relative merits of dc and ac...

Concepts of maximum power transfer of dc systems and associated ac voltage variations, particularly at inverter stations having low short-circuit ratios, have been extended to include various ac load models and an ac line in parallel with the dc line. The operating capabilities are shown to vary from those ...

The results of a study for the improvement of Spacelab's baseline electrical power and distribution system (EPDS) are presented. Three technical areas are covered. These are improvement of baseline-EPDS hardware, the introduction of an additional power source for experiment power augmentation, and the replacement ...

The Gemini Synchronous inverter is a solid state device that, when interposed between a variable-voltage DC power source and an AC power grid, converts the DC to AC at standard line voltages and frequencies. If more power is available from the DC source ...

Jan 2, 2008 ... The PSF offers the capability for testing of flywheel systems and components, battery systems, fuel cells, AC power sources, ...

Specially designed synchronous ac generators can provide a high energy pulse power source capable of supplying energy to various pulse forming networks. One such generator, which is the subject of this paper, is presently being used as the prime power sou...

A novel interface circuit between solar cells and commercial ac source using Van Allen`s multivibrator is presented. In this circuit, the ac source is used for a backup of solar cells, and the source and load power flow is automatically balanced by the circuit itself ...

The ac free-electron laser (ac FEL) uses an ac (temporally oscillating but spatially uniform) field as the pump source with the hope that electromagnetic radiation will be produced with wavelength shorter than that can be generated by a conventional magnet FEL. The ac field can be provided by a ...

The Primary Power Sources Section is responsible for carrying out research and development tasks, maintaining expertise and providing technical consultants in the general field of primary power supplies. Subjects of immediate interest include batteries ac...

An AC uninterruptible power source is disclosed that provides multi-phase power output signals for actual use and a selectable single phase power output signal for use in testing. The AC uninterruptible power source further ...

A low voltage DC power-supply is described for an electronic circuit load which comprises: at least one battery; means for regulating the voltage delivered from the battery to the load; and means for charging the battery from AC line power source comprising: means for controlling the charging voltage applied to the ...

A new static AC/DC portable military power source providing either 115 V, 400 Hz, AC or 28 V DC, or a combination of both, is described. The primary power source for the AN/GSQ-152( ) Power Supply Set is a thermoelectric generator operating in parallel ...

A modular, low weight impedance dropping power supply with battery backup is disclosed that can be connected to a high voltage AC source and provide electrical power at a lower voltage. The design can be scaled over a wide range of input voltages and over a wide range of output voltages and delivered ...

This was a summary report of aircraft power capacity, both primary & secondary systems, because the power requirements of future special weapons relied on the power source change (from alternating current to direct current) in aircraft design philosophy.

...Identification. A transilluminator is an AC-powered or battery-powered device that is a light source intended...patients. (b) Classification. Class I for the battery-powered device. The battery-powered device is also exempt from the...

An electric system including at least a pair of battery strings and an AC source minimizes the use and maximizes the efficiency of the AC source by using the AC source only to charge all battery strings at the same time. Then one or more battery strings is used to ...

Significant advances in modern ac/ac power converter technologies and demands of industries have reached beyond standard ac/ac power converters with voltage-source inverters fed from diode rectifiers. Power electronics converters have been matured to stages toward compact ...

A single-chip integrated LED particularly adapted for direct use with a high voltage DC or AC power sources comprises a plurality of electrically isolated LEDs on a generally transparent substrate and bonded to electrically conductive elements on a therma...

The AC-DC Power Processor Type I Power Module furnishes O-100ADC over an output voltage range of 24 to 32VDC from a 120/208 30 50/60/400Hz power source. Remote output voltage sensing at the load circuit is provided to eliminate the IR drop of the power di...

the average home and you'll find all sorts of electronic gadgets � digital cameras, mobile phones, MP3 players

Experiments are described on the excitation of compression waves in plasmas by transient phenomena such as shocks and arcs or by hydromagnetic instabilities. The possibility of powering them from an external source is suggested. (A.C.)

was remember the soldier, it must be set and forget. The systems can operate on a wide range of power sources; AC inputs from 60 to 400 Hz and DC inputs of ...

The book illuminates the special features of the construction and characteristics of new and improved designs for electrical machines employed in autonomous power-supply sources. The special features of the physical processes of dc and ac electrical machi...

A photovoltaic power generation system based on immittance conversion theory is described. The name of an AC module stands for an integrated inverter installed on the backside of the PV module panel, and it generates about 100W of ac power. One distinctive feature of the proposed system the modules supply ...

This invention relates to a power supply system having the capability of furnishing to a load sensitive to electrical faults and interruptions, electrical power for prolonged periods of time after a utility or other external power supply source thereto is interrupted. The system comprises a main ...

An electronic circuit is described for precisely controlling the power delivered to a load from an a-c source, and is particularly useful as a welder timer. The power is delivered in uniform pulses, produced by a thyratron, the number of pulses being controlled by a one-shot multivibrator. The starting ...

... DTIC's PDF and Excel spreadsheet versions of Congressional ... 208 30 50/60/400Hz power source. ... thyristor series LC resonant inverter power stage ...

Electronic instrumentation and control devices, 'floating' at high voltage potentials, are commonly affected by a high level of electrical noise. An investigation of the possible noise source shows that elimination of the 60 Hz power supply could be a major step toward the noise protection. This paper discusses the possibility of ...

Sep 3, 2010 ... SUBTOPIC TITLE: Power Management and Storage. PROPOSAL TITLE: Efficient Lightweight AC-AC Power Control for Solar UAV ...

Synchronous inversion involves the use of intermittent and/or variable power sources (wind, solar electric, solar thermal, hydro, tidal, wave, ocean thermal, industrial waste heat, etc.) to supplement a primary power source (anything from a 10 kilowatt diesel/generator set to a coast to coast utility grid). The ...

This patent describes, for use in an energy-using device adapted to operate from an external source of A-C power and from either rechargeable type or non-rechargeable type batteries of the same standard size and configuration, a charging system comprising in combination: a housing for the energy-using device. The energy-using device ...

Direct AC/AC converters have been studied due to their potential use in power converters with no DC-link capacitor, which can contribute to the miniaturization of power converters. However, the absence of a DC-link capacitor makes it difficult to control the AC motor during power interruption. ...

The foreseeable shortages in conventional sources of electric power has increased the emphasis on the research and development of alternate sources of energy. In order to make a noteworthy impact, the alternate sources of energy need to be utility interactive by means of a power electronic ...

Single-phase and three-phase voltage source converters with variable voltage and constant frequency ac-ac conversion are presented. These converters are a single bridge circuit of two legs for single-phase conversion and of three legs for three-phase, respectively. Both the power source and the load are connected ...

A battery charge system for a transfer magnet (Heretofore generally known as a lift magnet) and for a chuck control is disclosed. In the case of the transfer magnet, the battery provides constant power, while in the case of the chuck control, it serves as a standby power. The charge system is automatically connected when the charge on the battery reaches a ...

The paper presents a formulation for coordinating all controllable reactive power sources, including the DC converters of a multiterminal DC system, to correct bus voltage violations. Based on the formulation, an algorithm using Linear Programming solution technique has been developed. The effectiveness of this algorithm to correct bus voltage violations ...

The SERT 2 spacecraft utilizes a 1.5-kW solar array as the primary source of electrical power. The spacecraft power system controls this power as required for housekeeping functions, experiments, and ion thruster system. To meet mission objectives, three separate systems were designed and implemented--regulated dc ...

to produce hydrogen by electrolyzing water � Characterize electrolyzer performance under variable input power Bridge Current Wind-Electrolysis Project AC Source (Wind Turbine) Simulator 10kW Wind Turbine AC-DC Power � Power electronics (PE) regulating voltage � 50A ...

A new quasi current resonant dc link (QCRDCL) topology has been developed in this paper. Although prototype current resonant dc link topologies for ac/ac power conversion have had such problems as irregular high current peaks, uncontrollable pulse width, etc., this new topology enables the ac/ac conversion system to have the properties ...

This patent describes a combination power supply-battery backup power supply-battery charger, comprising: an AC power source, including a transformer means for providing a predetermined AC voltage; a rectification means placed in an AC circuit with the ...

A system and method for detecting partial discharges or arcing in wiring or cables is disclosed. The system employs a high-voltage AC power source to generate a high-voltage, low-current AC waveform, which is propagated through a selected wire, which in t...

The need for the system harmonic impedance information and methods to determine it by test and/or calculation is addressed. The project undertook research to measure harmonic impedances and sources on a power system and to modify existing analytical techniques to more closely match the field test measurements. The information will improve the ability of a ...

Light Source Note LS-176 lists four types of corrector magnets and their power supply specifications. In order to simplify the AC operation of corrector magnets for closed orbit correction feedback, adopting a single type of corrector magnet for the whole...

The performance of the power supply of the NOL 3 megawatt research arc is predicted by an analysis which represents the arc voltage as a square wave in a series circuit consisting of a voltage source, a limiting reactor, resistance of the substation, and ...

The Advanced Photon Source (APS) requires a number of correction magnets. Basically, two different types of bipolar power supplies (BPS) will be used for all the correction magnets. One requires dc correction only, and the other requires dc and ac correct...

ehv dc has come into prominence in recent years as a possible economical means of bulk power transmission. Present systems, such as the proposed Pacific Northwest Southwest Intertie, consist of two converter terminals interconnected by a dc transmission line. The source terminal rectifies power from the ac system ...

Recent advances in laboratory high power microwave (HPM) source capabilities have raised concerns regarding the survivability of US systems if HPM weapon systems using such sources are deployed in the battlefield. In this paper an overview of recent US ac...

~150 Keithley 2182 Nano Voltmeter AC Power 1) Where are ground connections? 2) Config-Delta I-High = 1� DC/Delta Mode Measurement Keithley 6221 Current Source & 2182 NanoVoltmeter Low Triboelectric cable

A new multiple dc-inputs direct electric-power converter (D-EPC) has been developed. It is placed between multiple dc power sources and an ac motor, thereby eliminating the need for a dc/dc converter that is generally used in conventional converter/inverter systems. D-PEC can improve the efficiency of a motor drive ...

A rectifier power supply arrangement is designed for use with a Geiger counter well logging system. In this system, the counter and rectifier supply source in a well bore are connected through a cable to a low-voltage a-c power supply and to indicating means on the surface. A transformer serves as a step-up ...

A new multilevel voltage-source inverter with a separate dc sources is proposed for high-voltage, high-power applications, such as flexible ac transmission systems (FACTS) including static var generation (SVG), power line conditioning, series compensation...

Page 1. EFFECT OF AC POWER ON EBW DETONATORS Allan H. Herrbach ... 4. TITLE AND SUBTITLE Effect of AC Power on EBW Detonators 5a. ...

Efficient, light-weight power conditioning equipment was investigated in the area of AC to AC transformation, where AC of a variable frequency is to be transformed efficiently into AC of a fixed frequency at a significant power level. This task, which fol...

The results of a study of proposed lunar base architectures to identify issues concerning centralized and decentralized power system deployment options are presented. The power system consists of the energy producing system (power plant), the power conditioning components used to convert the generated ...

Plagiarism detection in programming assignments is still a very problematic issue, in terms of economic costs, conceptual controversy, legal risks, and detection algorithms and heuristics. In this paper, we present AC: an integrated environment for the study of plagiarism and a powerful tool for its detection. We explain the special design of ...

The utility grid voltage of commercial AC power source in Japan and USA is 100V, but in other Asian and European countries, it is 220V. In recent years, in Japan 200V outputted single-phase three-wire system begins to be used for high power applications. In 100V utility AC ...

The SSC collider is designed to have circumference of 87 km. The superconducting magnets along the collider ring are grouped into ten sectors. Each sector, a string of average length of 8.7 km,m is powered by one power source located near the center of the sector. Because of the alternating-current (ac) electrical ...

A piezoelectric motor has peak performance at a specific frequency f.sub.1 that may vary over a range of frequencies. A drive system is disclosed for operating such a motor at peak performance without feedback. The drive system consists of the motor and an ac source connected to power the motor, the ac ...

A single active element performs the multiple functions of regulating dc voltage level from an ac source supplied to charge a battery and of coupling the battery to power an emergency system such as an emergency lighting system upon loss of the ac source. Preferably, the single active element ...

The successful application of superconductivity to motors and other power system components depends on the characterization and subsequent minimization of the ac loss in the superconductor used for fabrication of the component. The superconductive component, excited by an ac power source, may ...

This article describes inverter-based ac traction systems which give freight locomotives greater adhesion, pulling power, and braking capacity. In the 1940s, dc traction replaced the steam engine as a source of train propulsion, and it has ruled the freight transportation industry ever since. But now, high-performance ...

HVDC consisted by self-commutated inverters is able to be applied for power transmission that connecting from a remote large windfarm to weak ac system. Most self-commutated HVDC is applied for connection between two ac systems they have synchronous power sources, but it is not suitable for ...

A system is disclosed for storing electrical energy and for converting dc power to ac power. The system includes a very large flywheel which is mounted in an evacuated housing and is driven by a plurality of wheels powered by dc electric motors which receive current from an input power ...

A harmonic power flow program applicable to space power systems with sources of harmonic distortion is described. The algorithm is a modification of Electric Power Research Institute's HARMFLO program which assumes a three-phase, balanced, ac system with loads of harmonic distortion. The ...

The present investigation is concerned with dc/ac power conditioning interfaces that employ active waveshaping techniques. It is shown that these interfaces can be accomplished with only one high-frequency transistor/diode switch pair, even if power must flow in both directions. It is noted that the necessary alteration in topology can ...

The stable operating power limits of a small scale HVDC system composed of voltage source converters (VSC-HVDC system) are analyzed with a simple model. The VSC-HVDC system could operate where the AC system must be somewhat larger in capacity than the VSC-HVDC system capacity. The stable operating power limits were ...

Large conducting space structures in low Earth orbit will have a nonnegligible induced potential across their structures. The induced current flow through the body and the ionosphere causes the radiation of Alfven and lower-hybrid waves. This current flow is taken to be ac, and the radiated power is studied as a function of the ac ...

Large conducting space structures in low Earth orbit will have a nonnegligible motionally induced potential across their structures. The induced current flow through the body and the ionosphere causes the radiation of Alfven and lower hybrid waves. This current flow is taken to be ac, and the radiated power is studied as a function of the ...

In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the ...

In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the ...

...AC-powered magnet. (a) Identification. An AC-powered magnet is an AC-powered device that generates a magnetic field intended to find and remove metallic foreign bodies from eye tissue. (b) Classification. Class...

An on-board charger for an electric vehicle propulsion system is described which provides high charging capacity with minimum weight addition by sharing major elements of the electric vehicle power converter. In the preferred construction, the vehicle power converter has a magnetic element, an interphase transformer, connecting the output of the converter ...

The use of microprocessors in power converter controls is of interest since they could reduce system costs, increase system adaptability, and enhance system reliability where analog circuitry is conventionally used. This paper discusses the techniques that were applied in designing a complete microprocessor-controlled sc/dc power conversion system, ...

of a portfolio of (hopefully) carbon dioxide limiting sources of electrical power. It is time to assess will in turn depend on the uncontrolled availability of the power sources being used (e.g. wind). In addition region and on wind as one alternative. Wind power is chosen for illustrative ...

After presenting briefly the new provisions laid down by the Electricite de France to meet a total electrical power loss, the main elements of the probabilistic study concerning the corresponding risk are described: reliability data of internal sources us...