| Patents for H02P 27 - Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage (13,284) |
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| 06/17/1998 | EP0848487A2 Inverter controller |
| 06/16/1998 | US5767652 Method and system for supplying optimal power to an inductive-type load |
| 06/11/1998 | WO1998025335A1 Sensorless control method and apparatus of permanent magnet synchronous motor |
| 06/10/1998 | DE19716349C1 Loom leno selvedge unit drive |
| 06/09/1998 | US5764499 Direct a.c. converter |
| 06/09/1998 | US5764024 Pulse width modulator (PWM) system with low cost dead time distortion correction |
| 06/09/1998 | US5764022 Air conditioner and inverter driving circuit therefor |
| 06/09/1998 | US5764021 Method and device for speed control of an induction motor |
| 06/03/1998 | CN1183669A Driving apparatus of switched reluctance motor |
| 05/27/1998 | EP0843912A1 Process and device for operating an asynchronous motor |
| 05/26/1998 | US5757161 Apparatus and method for limiting the speed of an electric motor |
| 05/26/1998 | US5757153 Control system for electric vehicle |
| 05/20/1998 | CN1182306A Inverter driving circuit for brushless D. C. motor |
| 05/13/1998 | EP0620920B1 Method for determining the short-circuit inductance of an asynchronous machine |
| 05/07/1998 | WO1998019389A1 Rotating machine integrated with controller, and inverter |
| 05/05/1998 | US5748459 Electric leakage current prevention using an equivalent impedance |
| 05/05/1998 | US5747963 Method for controlling an electric motor and electric apparatus |
| 05/05/1998 | US5747958 Circuit arrangement for powering a two-phase asynchronous motor |
| 05/05/1998 | US5747957 Method of controlling vectors in motor and vector-controlling inverter device |
| 05/05/1998 | US5747955 Current sensing module for a variable speed AC motor drive for use with a treadmill |
| 05/05/1998 | US5747833 Apparatus for driving induction motor |
| 04/30/1998 | DE19641832C1 Drehstromsteller mit interruptgesteuerter Phasenanschnittsteuerung Andiductor with interrupt-phase control |
| 04/28/1998 | US5744927 Inverter control method and apparatus |
| 04/28/1998 | CA2047322C Waveform generator for inverter control |
| 04/23/1998 | WO1998016995A1 Operating system for a vacuum pump |
| 04/23/1998 | DE19745578A1 Semiconducting voltage converter |
| 04/21/1998 | US5742493 Power conversion apparatus |
| 04/16/1998 | WO1998016004A1 Three-phase current regulator with interrupt-performed phase control |
| 04/16/1998 | DE19705672A1 Antrieb für eine Vakuumpumpe Drive for a vacuum pump |
| 04/15/1998 | EP0836270A1 Method for controlling current of ac servo motor |
| 04/15/1998 | EP0836009A2 An electronic control unit for a vacuum pump |
| 04/15/1998 | CN1179029A Method for controlling motor and electric equipment |
| 04/14/1998 | US5739649 Fail check device and method for AC motor control circuit |
| 04/07/1998 | US5737199 Fail Check Device and method for switching signal lines |
| 04/07/1998 | US5736916 High frequency pulse transformer for an IGBT gate drive |
| 04/07/1998 | US5736829 High-speed constant-horsepower motor |
| 04/01/1998 | EP0833436A2 AC motor control for a high speed deep well pump |
| 04/01/1998 | EP0833434A1 Synchronous motor synchronising method and device |
| 04/01/1998 | EP0833138A1 Device for determining a resistive torque of a rotating equipment, control system for an electrical motor and parameter regulation for an associated centrifuge |
| 04/01/1998 | EP0627135B1 Controlling device for electric motors |
| 04/01/1998 | CN1177758A Control and operation method for rotary machine |
| 03/31/1998 | US5734251 Control apparatus for AC motor |
| 03/31/1998 | US5734250 Method and arrangement for controlling an induction motor |
| 03/31/1998 | US5734249 Method and apparatus for direct torque control of a three-phase machine |
| 03/31/1998 | US5734248 Current modulation motor controller |
| 03/25/1998 | EP0831577A2 Method for controlling an electric motor and electric apparatus |
| 03/24/1998 | US5731682 Control unit and control method for motors |
| 03/18/1998 | EP0770282B1 Direct a.c. converter |
| 03/18/1998 | EP0739457B1 Process and device for controlling an electric induction machine with a special winding for simultaneously generating a torque and a transverse force therein |
| 03/18/1998 | EP0716782B1 Variable speed motor controller |
| 03/17/1998 | US5729449 Current command type PWM inverter apparatus with logic circuit for generating switching command signals at periodical timings |
| 03/17/1998 | US5729446 Converter circuit arrangement with actively controllable current and voltage rise limiting means |
| 03/11/1998 | CN1175816A Method and apparatus for control of rotary magnet type polyphase synchronous motor |
| 03/10/1998 | US5726550 Motor control system for centrifuge |
| 03/10/1998 | US5726549 Sensor-less control apparatus for permanent magnet synchronous motor |
| 03/10/1998 | US5726545 Current controlling method for servo motor |
| 03/10/1998 | US5724904 Sewing machine control device with an inverter for controlling an induction motor |
| 03/04/1998 | EP0826269A1 Starter/generator system and method utilizing a low voltage source |
| 03/04/1998 | CN1175122A Speed-change controller for induction motor |
| 03/04/1998 | CN1037650C Controller for power converter |
| 03/03/1998 | US5723968 Variable speed system |
| 02/25/1998 | EP0825059A2 Controller for driving a permanent magnet type synchronous motor |
| 02/18/1998 | EP0593738B1 Programmed pwm inverter controller |
| 02/11/1998 | EP0823774A1 Frequency converter for operating an asynchronous three-phase motor |
| 02/11/1998 | CN1173067A PWM inverter apparatus |
| 02/11/1998 | CN1172746A Drive system for engine and control method therefor |
| 02/05/1998 | WO1998004835A1 Process for regulating a unit or a frequency converter |
| 02/04/1998 | EP0822653A1 Motor control device, especially for a pump |
| 02/04/1998 | EP0822648A1 Method and device for control of invertors |
| 02/04/1998 | EP0822647A1 Electric apparatus having heat radiating fin |
| 01/29/1998 | DE19629564A1 Miniature high-power electric drive arrangement e.g. for asynchronous and synchronous and other AC motors for electric vehicle |
| 01/28/1998 | EP0821304A1 Method and device of PWM control |
| 01/28/1998 | EP0820893A2 Traction system for rail vehicle and control method therefor |
| 01/28/1998 | EP0597132B1 Power converter |
| 01/28/1998 | CN1171652A Method and apparatus for direct torque control of induction machine |
| 01/28/1998 | CN1037221C Inverter control method and apparatus |
| 01/27/1998 | US5712457 Apparatus for regulating an elevator motor |
| 01/22/1998 | WO1998002958A2 Method and apparatus for controlling an induction motor |
| 01/22/1998 | DE19627506A1 Computer-controlled opto-electronic power control system for three=phase AC machine |
| 01/21/1998 | EP0730721B1 Electronic control arrangement for motor-driven refrigeration compressors |
| 01/15/1998 | WO1998001944A1 Method for diagnosing abnormality of circuit member of inverter driving controller for driving and controlling motor |
| 01/07/1998 | CN1169618A Voltage type inverter and control method thereof |
| 01/07/1998 | CN1036968C Device to regulate speed of electric motor and its operation method |
| 01/06/1998 | US5705905 Source impedance measurement for motor control |
| 01/06/1998 | US5705904 Frequency converter device which adaptively responds to a power failure |
| 12/31/1997 | WO1997049920A1 Well pumping equipment |
| 12/31/1997 | CN1169056A Variable speed controller for AC motor |
| 12/31/1997 | CN1169049A Capacity judging apparatus of capacitor in power converter outputting three level voltage |
| 12/31/1997 | CA2257173A1 Well pumping equipment |
| 12/30/1997 | US5703459 Driver for an induction motor |
| 12/29/1997 | EP0814473A2 Harddisk spindle motor controller with either PWM or linear current control output |
| 12/24/1997 | WO1997049170A1 Multiplex pulse-width modulation power converter |
| 12/23/1997 | US5699609 Method of making power substrate assembly |
| 12/23/1997 | CA2008127C Method and apparatus for controlling a single-or polyphase a.c. controller |
| 12/17/1997 | EP0616417B1 Method for control of ac motor |
| 12/16/1997 | US5698823 Elevator control system |
| 12/16/1997 | CA2068155C Electric current measurement apparatus for a solid state motor controller |
| 12/10/1997 | EP0812059A1 Control process for a rotary machine, servosystem for carrying out this process and rotary machine with such a system |
| 12/06/1997 | CA2208008A1 Process for mechanical control of a rotating machine, system of control for operating the said process, rotating machine equipped with such a system |
| 11/26/1997 | CN1166086A Vector control method and vector control inverter of motor |