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7612519 Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit, a starting capacitor and a resistive element  
Apparatus for driving a three-phase compressor assembly from a single-phase electrical power supply having first and second power lines, said three-phase compressor assembly comprising a compressor...
7609534 Operating a three phase device using single phase power  
A powering arrangement ( 32, 34 ) for a device ( 30, 22 ) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes...
7595604 Motor control device  
Let the rotating axis whose direction coincides with the direction of the current vector that achieves maximum torque control be called the qm-axis, and the rotating axis perpendicular to the...
7245105 Single-phase induction motor and method for reducing noise in the same  
A single-phase induction motor and a method for reducing noise in the same, which can eliminate unbalance between magnetomotive forces of main and auxiliary windings in a stator of the motor,...
7196490 Variable speed motor  
A variable speed motor includes first and second main windings wound on a stator, and a relay for performing a switching operation between serial/parallel connections of the first and second main...
7190601 Pulse-width modulation method for a frequency converter  
A space-vector pulse-width modulation method for a frequency converter provided with a voltage intermediate circuit, said frequency converter comprising a mains bridge ( 10 ) to be connected to an...
6690587 Apparatus and method of suppressing low speed ripple current of a single-phase inverter  
An apparatus and method to suppress a low speed ripple current to a motor include a power supply unit to supply single-phase alternating current (AC) power. A rectifying and smoothing unit...
6636013 Method of rapidly starting an asynchronous motor  
In order to accelerate an asynchronous motor with a squirrel-cage rotor even under load extremely quickly, and in particular within the time of an electromagnetic rotor time constant, in order to...
6560130 Control circuit for multiphase inverter apparatus  
In a control circuit for a power converting apparatus, such as a three-phase inverter, unnecessary switching operations of switching elements are avoided. The control circuit includes current...
6472844 Single-phased powered drive system  
A drive system including a rectifier, a high-frequency filter, a static inverter and an induction motor is driven without energy stores and fed by the single-phase mains, in which the use of an...
6362592 Method and device for driving brushless motors either with independently coupled windings or with star or polygon pre-connected windings using the same I.C.  
A method is provided for driving a brushless motor of a type including windings pre-connected in a star or polygon configuration with an integrated driving system designed for independently driving...
6359405 Failure detection system for a propulsion system  
In a propulsion system for hybrid vehicles, etc., a failure detection system that detects the occurrence of failure that obstructs a phase current supplied to an electric motor for propulsion. The...
6356041 Master three-phase induction motor with satellite three-phase motors driven by a single-phase supply  
A motor system utilizes a master three-phase induction motor driven by a single-phase power supply which the motor has six-windings connected in a symmetrical double DELTA or double WYE...
6275405 Motor drive circuit  
A phase converter for converting single-phase power to three-phase power, wherein the single-phase power is provided at a first and a second single-phase power terminal and the three-phase power is...
6242883 Variable speed three-phase motor drive with two inverter circuits  
An apparatus and method for driving a three-phase motor from an AC energy source includes a converter connected between the energy source and an inverter. The inverter includes two inverter...
6130488 Switching filter producing a low impedance control input on a high impedance input line for discriminating false control signals  
A switching filter is disclosed for discriminating false control signals from actual control signals. The switching filter is particularly useful on a high impedance input, such as that of a motor...
6058032 Multiplex pulse-width modulation power converter  
6049284 Method and zero-speed monitor for monitoring a three-phase machine  
A method and apparatus for monitoring a three-phase electric motor which has been disconnected from the electrical mains and is running down, one phase of the voltage generated by the motor being...
6025693 Motor starter  
An improved method of starting three-phase and three-winding induction motors from a single phase supply reconfigures the 6 accessible windings of a standard induction motor into first an optimal...
5969957 Single phase to three phase converter  
A converter for providing three phase power to a three phase load from a single phase supply includes an inverter connected to single phase input power lines and a bi-directional switch connected...
5892279 Packaging for electronic power devices and applications using the packaging  
A packaging for high-power devices such as Insulated Gate Bipolar Transistors includes a direct bonded copper substrate (DBC), such as beryllium oxide (BeO), soldered directly to a heat generating...
5764021 Method and device for speed control of an induction motor  
A method and device are disclosed for speed control of an AC induction motor by means of a control circuit which generate a motor drive voltage consisting of a combination of AC and time-spaced DC...
5670858 Single-phase induction motor safety controller  
An electronic control apparatus to operate an alternating current induction motor protecting same from power line blackouts, brownouts and providing self-adjusting, linearized, non-stepped reduced...
5621296 Three phase motor conversion and monitoring circuit  
A three phase motor conversion and monitoring circuit converts a three phase motor to be started and run on single phase line power. During motor start-up, the circuit connects a start capacitor...
5545965 Three phase motor operated from a single phase power supply and phase converter  
A standard three-phase induction motor wherein two motor windings are connected across a single phase power supply, and a center-tapped autotransformer is connected between the third motor winding...
5436546 Method and apparatus for switching back a change-pole motor  
To enable a gentle switching back of a change-pole motor to a low speed while ensuring the full moment or torque on passing into motor operation, a method for switching back the change-pole motor...
5402053 Single phase to three phase converter capable of variable speed motor operation  
A converter, for providing three phase power to a three phase induction motor from a single phase supply, includes an inverter connected to the single phase input power lines which has two...
5313150 Drive control apparatus for an air conditioner having a modular inverter and a control circuit mounted on a common substrate  
A drive control apparatus for controlling a motor to drive the compressor of an air conditioner, according to the present invention, includes a rectifying circuit for converting an AC voltage into...
5300870 Three-phase motor control  
A three-phase induction motor is driven efficiently from a single-phase power supply by reconnecting the motor windings and using two or more capacitors to provide balanced currents and voltages in...
5293108 Static phase converter  
A relatively compact static phase converter is adapted to be disposed within the housing of an appliance, such as a refrigeration unit, making it thus suitable for residential as well as commercial...
5272616 Single phase to three phase power converter for motor loads  
An apparatus for converting single phase input power to three phase output power supplied to a motor includes a pair of input lines, and a pair of DC bus lines, a pair of capacitors, a pair of...
5146146 Method and device for operating electric drives  
For operating electric drives, in particular of two-pole and multi-pole asynchronous induction motors intended for driving devices having at least two significantly different operating speeds it is...
5065305 Rotary phase converter having circuity for switching windings to provide reduced starting current with rapid, dependable starting  
A starting system for a rotary dynamoelectric converter is disclosed. The converter is of the type having three sets of windings wired in either delta or wye configuration. Each set of windings...
4992718 Electric floor cleaner with a soft start function  
An electric floor cleaner is of the type arranged to drive a three-phase motor, whose rated voltage is substantially equal to a voltage obtained by voltage doubling and rectifying a single-phase...
4978894 Single phase to three phase rectifier/inverter with DC ripple compensation  
In a power converter apparatus, variations contained in a single-phase AC input voltage cause a beat phenomenon in a three-phase DC/AC inverter. To avoid such a beat phenomenon, the single-phase AC...
4792740 Three-phase induction motor with single phase power supply  
A three-phase induction motor is efficiently driven by a single phase power supply by, in one embodiment, splitting the three windings into six, connecting them in two symmetrical motors, with two...
4777421 Phase converter for motor  
A single-phase to three-phase converter for starting and running a single, three-phase, load carrying induction motor having first, second and third Y-wound stator windings from a single phase...
4751447 AC motor speed control apparatus  
The present invention discloses a speed control apparatus for an AC motor which vector-controls, for example, a drive current of the AC motor such as an induction motor, synchronous motor and AC...
4719560 Rotary phase generator and system  
A rotary phase generator for generating 3 phase voltage is provided which can operate off of 230 or 460 volts A-C. Also provided is a rotary phase generator which has two groups of running...
4713744 Fractional frequency converter using zero switching of input frequency halfwaves  
A frequency converter is provided for a three-phase electric motor and has input connections for a multi-phase alternating current electric supply source, and output connections for connection to a...
4644241 Single phase to three phase signal converter  
An apparatus for converting a single phase electrical signal into a three phase electrical signal is disclosed. A converter includes a rectifier connectable to a single phase electrical power...
4644240 Method and apparatus for controlling reverse-conducting GTO thyristor  
A reverse-conducting GTO thyristor comprises a gate turn-off thyristor and a diode which are formed on a single semiconductor substrate so as to have a common layer and be connected electrically in...
4618809 Apparatus for converting single-phase power to three-phase outputs  
An inverter apparatus for converting a single-phase A.C. power source to three-phase A.C. outputs is described wherein the single-phase power source is directly connected to a first phase load and...
4513237 Energy efficient multi-phase dual voltage electric motor  
A circuit which enables a three phase, Y connected motor to be operated on either one phase or three phase power at either 230 or 460 AC line voltage. A modified circuit includes power factor...
4484125 Three-phase delta-wound motor operated from single-phase current  
A three-phase delta-wound motor adapted for operation from a source of single-phase current, which motor includes first and second terminals adapted to be connected to the single-phase current...
4300077 Trans-synchronous motor apparatus and method  
This disclosure is concerned with a motor technique for generating speeds that are fractions of synchronous speeds, through novel time-staggered selected half-cycle energization of a plurality of...
4060754 Electronic motor that includes an electronic waveform synthesizer and the synthesizer per se  
An electronic motor that accepts single-phase power and converts the same to polyphase power which is delivered to a polyphase winding of the machine. The electronic motor includes an electronic...
4039910 Dynamoelectric machine  
A dynamolectric machine stator has a primary winding for single phase alternating current input and a secondary winding for polyphase alternating current to be supplied from output terminals. The...
3835356 SYSTEM FOR OPERATING THREE-PHASE INDUCTION MOTOR UNDER BALANCED CONDITIONS FOR CHANGING LOADS  
Improvements are made to an autotransformer-capacitor static phase converter for energizing a three-phase induction motor from a single-phase source which enable the motor to operate under balanced...
3809980 PHASE ADAPTER  
A device is disclosed for converting single-phase power to three-phase power. The device includes an autotransformer and a variable impedance device for adjusting the magnitude and phase of the...
Matches 1 - 50 out of 64 1 2 >