| Patents for H02P 27 - Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage (13,284) |
|---|
| 06/25/1991 | US5027049 Method for increasing the speed of an alternating current motor |
| 06/11/1991 | US5023538 PWM inverter apparatus for controlling rotating magnetic flux in a.c. motors |
| 06/05/1991 | EP0430044A2 Method of controlling an inverter |
| 06/05/1991 | EP0430009A1 Power supply unit for a vacuum pump with magnetic thrust bearings and with an auxiliary power supply for the thrust bearings in case of a power failure |
| 06/04/1991 | US5021726 Process for driving an alternating-current motor and an alternating current motor which can be driven in accordance with this process |
| 06/04/1991 | US5021724 Controlling apparatus for induction motor |
| 05/30/1991 | WO1991007810A1 Process for correcting a detected faulty actual value of a signal with harmonic vibrations and circuit arrangement for implementing this process |
| 05/29/1991 | EP0429125A2 Circuit for controlling a free-piston engine, in particular of a refrigerator compressor |
| 05/22/1991 | EP0428035A2 Three-phase cycloconverter |
| 05/21/1991 | US5017855 Current controlled inverter |
| 05/21/1991 | CA1284351C Induction motor synthesis control apparatus and method |
| 05/21/1991 | CA1284350C Induction motor control apparatus and method for restart when rotating in shutdown |
| 05/16/1991 | WO1991007008A1 Main shaft motor control method |
| 05/15/1991 | EP0427527A2 Offset correction circuit of PWM inverter |
| 05/08/1991 | DE3937036A1 Regulating pulsed current for three=phase motor - using two point regulator controlling transistor or thyristor power output stage |
| 05/07/1991 | US5012899 Apparatus for controlling an elevator |
| 04/24/1991 | EP0423384A1 Control arrangement for an elevator system without a speed sensor |
| 04/23/1991 | US5010287 Induction motor control system |
| 04/18/1991 | DE3934400A1 AC-DC-AC inverter operation for three=phase motor supply - involves two thyristor inverters switched from sinusoidal phase current mode to indirect mode at transitional speed |
| 04/16/1991 | US5008608 Controller for starting and stopping electric motors |
| 04/11/1991 | DE3933525A1 Inverter-fed motor excitation with isolated stator windings - involves switching between direct and indirect operations at different phases of sinusoidal cycle for separate inverters |
| 04/11/1991 | DE3933524A1 Inverter-fed motor operation with isolated stator windings - allows direct inverter operation at low speeds with quadrature sinusoidal currents from independent-fired thyristor bridges |
| 04/09/1991 | US5006775 Method and apparatus for preventing a current collapse in a phase not participating in the commutation of a three-phase, block-current supplied synchronous machine |
| 04/03/1991 | EP0419656A1 Speed controller |
| 04/02/1991 | US5005115 Forced-commutated current-source converter and AC motor drive using the same |
| 04/02/1991 | US5005114 Circuitry for generating phase-shifted sinusoidal voltages |
| 03/26/1991 | CA1282113C Computerized servo drive |
| 03/21/1991 | WO1991003869A1 Variable speed ac drive control |
| 03/19/1991 | US5001411 Method for simulating the actual load angle of a polyphase machine and circuit arrangement for carrying out the method |
| 03/13/1991 | EP0416050A1 A device with a multi-phase load, a static converter and choke coils. |
| 03/12/1991 | US4999561 Variable-speed driving system |
| 03/12/1991 | US4999560 Electric motor running system employing photovoltaic array |
| 03/06/1991 | EP0414865A1 Process for masking the noise signals emitted by the sound-emitting mechanical elements of a vehicle, in particular a submerged submarine, and submarine. |
| 03/06/1991 | EP0414662A1 Method and device for driving an asynchronous motor with speed control by means of a controlled inverter |
| 03/06/1991 | CN1049760A Pulse width modulation type inverter having temp. compensation |
| 03/05/1991 | US4998053 Method and apparatus for reducing a current break in a leg that is not participating in the commutation of a three-phase block current fed synchronous machine |
| 02/27/1991 | EP0413966A2 Pulse width modulation type inverter having temperature compensation |
| 02/27/1991 | EP0245395B1 Control circuit |
| 02/26/1991 | US4996469 Electric motor controller with bypass contactor |
| 02/20/1991 | EP0413447A2 Drive arrangement |
| 02/19/1991 | US4994950 Waveform generator for inverter control |
| 02/13/1991 | CN1011580B Controlling apparatus for alternating current elevator |
| 02/12/1991 | US4992924 Switching |
| 02/12/1991 | CA1280156C Inverter control apparatus for elevator motor |
| 02/12/1991 | CA1280155C Voltage-controlled field-oriented induction motor control system |
| 02/06/1991 | EP0126778B1 Servomotor control system |
| 01/29/1991 | US4988940 Method for the formation of the actual load angle value for a field-oriented regulated rotary field machine and corresponding regulation |
| 01/24/1991 | WO1991001062A1 Method of and device for controlling induction motor for compressor |
| 01/23/1991 | EP0187867B1 Method of and apparatus for controlling a synchronous motor |
| 01/22/1991 | US4987351 Load-based control of an AC motor |
| 01/22/1991 | US4986092 Speed control for inverter driven washing machine |
| 01/15/1991 | USRE33519 Method and apparatus for controlling induction motor |
| 01/15/1991 | CA1279093C Method and apparatus for controlling a rotating-field machine |
| 01/10/1991 | DE4019849A1 Induction motor control with prim. current feedback loop - changes current loop gain or velocity loop gain to predetermined value, greater in position adjustment mode |
| 01/09/1991 | CN1011176B Induction motor control apparatus |
| 01/08/1991 | US4982816 Induction motor |
| 01/03/1991 | DE3920812A1 Self-commutating thyristor regulator for rotary electrical machine - uses pairs of thyristors coupled in antiparallel to each network and each motor phase |
| 01/01/1991 | US4982143 Phase control circuit for protection of a motor against thermal overload |
| 12/27/1990 | EP0404174A1 Circuit for reducing power consumption and improving perfomance of an asynchronous electric motor |
| 12/25/1990 | US4980630 Method and apparatus for speed regulation of an asynchronous motor using strobe control |
| 12/19/1990 | CN1010852B Control device for elevator |
| 12/18/1990 | US4978903 Apparatus for the control of a three-phase a.c. motor, especially a squirrel-cage motor |
| 12/18/1990 | US4978897 Motor controller with an improved stopping technique |
| 12/18/1990 | US4978894 Single phase to three phase rectifier/inverter with DC ripple compensation |
| 12/13/1990 | WO1990015474A1 Motor controller |
| 12/13/1990 | WO1990015472A1 Process for compensating a phase and amplitude cycle between a multi-phase actual and set value and circuit for implementing the process |
| 12/12/1990 | EP0402267A1 Drive system of an electric motor with variable rotation speed and apparatus furnished with such a system |
| 12/12/1990 | EP0401386A1 Method of controlling slip frequency of induction motor |
| 12/11/1990 | CA1277704C Cross coupled current regulator |
| 12/05/1990 | EP0401057A2 Variable-speed driving system |
| 12/05/1990 | EP0400455A1 Synchronons motor as well as its operating method |
| 12/05/1990 | CN1010729B Electric power converter |
| 11/28/1990 | CN1010646B Driving arrangement for ac motor |
| 11/28/1990 | CN1010644B Control system for induction motor driving electrically-propelled vehicle |
| 11/28/1990 | CN1010643B Method of controlling electric motor for air-blower of air conditioner |
| 11/28/1990 | CN1010642B Control arrangement for turning induction motor |
| 11/28/1990 | CN1010640B Controller of electric power converter |
| 11/22/1990 | EP0397818A1 A process and device for changing the actual rotation speed of a multi-phase non-synchronous motor and a suitable motor system for applying the process. |
| 11/07/1990 | CN1010364B Control apparatus for induction motor |
| 11/06/1990 | US4968338 Inverter controlled air conditioner with optimum determination for over current detection |
| 10/31/1990 | EP0185773B1 Control board for ac motors |
| 10/31/1990 | CN1046573A Speed control for inverter driven washing machine |
| 10/30/1990 | US4967336 Partitioning a motor control circuit |
| 10/30/1990 | US4967135 Induction motor vector control |
| 10/30/1990 | US4967129 Power system stabilizer |
| 10/30/1990 | CA1275692C Electric power inverter with adaptive third harmonic auxiliary impulse commutation |
| 10/29/1990 | WO1990013454A1 Self-synchronous electric machine with controlled flow |
| 10/29/1990 | CA2054704A1 Controlled flux self-synchronous electrical machine |
| 10/24/1990 | CN1046419A Control arrangement for inverter current |
| 10/24/1990 | CN1010163B Composite control apparatus of induction motors |
| 10/23/1990 | US4965498 Electrically operated system for drawing curtains and other types of barriers |
| 10/23/1990 | CA1275436C Induction generator/motor system |
| 10/17/1990 | EP0392962A2 Speed control for inverter driven washing machine |
| 10/17/1990 | CA2009581A1 Current controlled full wave transistor bridge inverter for a multiple phase ac machine |
| 10/16/1990 | US4962976 A.C. motor drive method and apparatus for precision positional control |
| 10/10/1990 | CN1046071A Power converter with current-type inverter |
| 10/10/1990 | CN1009914B Control apparatus of elevator |
| 10/03/1990 | EP0390184A2 Improvements in variable-voltage & variable-frequency power converter |
| 09/20/1990 | WO1990010928A1 Process for influencing a noise source of a submarine and submarine |
| 09/20/1990 | WO1990007220A3 Electrically switched synchronous motor drive |