| Patents for H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control (5,487) |
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| 07/27/1999 | US5928366 Microcomputer based system for the fail-safe control of an electric motor or the like |
| 07/22/1999 | WO1999037014A1 A driver circuit for a synchronous, alternating-current electric motor |
| 07/22/1999 | WO1999029029A3 A method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine with permanent magnet rotor |
| 07/21/1999 | EP0930696A1 A driver circuit for a synchronous, alternating-current electric motor |
| 07/20/1999 | US5926386 Configuration based cooling fan speed control |
| 07/07/1999 | CN1222005A Method and circuit arrangement for commutation of multiple winding electric motor |
| 07/06/1999 | CA2115852C Overvoltage protection circuit |
| 06/30/1999 | CN1221184A Direct access storage device (DASD) with variable spindle rotation speed |
| 06/24/1999 | WO1999031660A1 Direct access storage device (dasd) with a variable spindle rotation speed |
| 06/23/1999 | EP0924847A2 Method and circuit arrangement for commutation of a multiple winding electric motor |
| 06/23/1999 | EP0791240B1 Economical wide range speed control system |
| 06/22/1999 | US5915070 Motor driving apparatus for pulse-width modulation controlling a DC voltage according to a rotation speed setting information |
| 06/22/1999 | US5914583 Motor control for box printing equipment |
| 06/16/1999 | EP0923192A1 Induction motor |
| 06/16/1999 | EP0922325A1 Method for controlling an asynchronous machine |
| 06/15/1999 | US5912543 Circuit having a digital controller for operation of a synchronous T motor |
| 06/10/1999 | WO1999029034A1 A method and a system for speed control of a rotating electrical machine with flux composed of two quantities |
| 06/10/1999 | WO1999029029A2 A method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine with permanent magnet rotor |
| 06/10/1999 | CA2315622A1 A method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine with permanent magnet rotor |
| 06/03/1999 | WO1999027644A2 Current regulated multiphase motor driver with a common current sense element |
| 05/25/1999 | US5907228 Rotating machine control command method, servocontrol system for implementing said method, rotating machine provided with a system of this kind |
| 05/12/1999 | EP0915348A2 Ground fault detection and protection method for a variable speed ac electric motor |
| 05/06/1999 | EP0913923A2 Servo-motor driving method |
| 04/27/1999 | US5898287 Slip controlled induction motor using variable frequency transducer and method for controlling slip |
| 04/22/1999 | WO1999019781A1 Method and circuit for monitoring the operating condition of electric motors |
| 04/22/1999 | DE19745490A1 Electric motor operation monitoring method |
| 04/20/1999 | US5896019 Motor control device |
| 04/14/1999 | EP0909014A1 Closed loop and open loop synchronization of the phase switchings in driving a DC motor |
| 04/14/1999 | CN1214156A Frequency converter for electromotor |
| 04/06/1999 | US5892349 Control circuit for two speed motors |
| 03/31/1999 | CN1042779C Controller for transducer |
| 03/16/1999 | US5883489 High speed deep well pump for residential use |
| 03/11/1999 | WO1999012254A1 Electric motor controller |
| 03/11/1999 | WO1998057878A3 Procedure for regulating the velocity of an elevator, and an elevator system |
| 03/10/1999 | CN1210354A Apparatus and method for controlling electric motor |
| 03/09/1999 | US5880573 Low-cost phase-lock motor control method and architecture |
| 03/03/1999 | EP0899864A1 Induction motor controller |
| 03/03/1999 | EP0759224B1 Method for controlling the power to be transferred via a mains inverter |
| 03/03/1999 | CN1209686A Electric control device |
| 03/02/1999 | US5877608 Current regulated multiphase motor driver with a common current sense element |
| 02/24/1999 | EP0898293A2 Apparatus and method for controlling an electric motor apparatus |
| 02/24/1999 | EP0898292A2 Electric control apparatus |
| 02/23/1999 | US5874873 Electric control apparatus |
| 02/23/1999 | US5874818 Method and apparatus for sensing load current in a motor controller |
| 02/16/1999 | US5872439 Motor control device |
| 02/10/1999 | EP0896263A2 Method and circuit for determining optimal control parameters for rotational speed control |
| 02/10/1999 | CN1042080C Inverter apparatus |
| 02/04/1999 | DE19725786C1 Controller for an asynchronous motor supplied by an inverter and in a control drive |
| 02/03/1999 | CN1206885A Pulse width modulator |
| 01/13/1999 | EP0803968B1 Motor speed controller |
| 01/07/1999 | WO1999000890A1 Induction motor |
| 01/07/1999 | DE19726586A1 Verfahren und Einrichtung zur Verringerung bzw. Kompensation von Drehzahleinbrüchen beim Einfädeln eines Walzgutes in ein Walzgerüst Method and apparatus for reducing or compensating for speed drops when threading a rolled into a roll stand |
| 12/30/1998 | WO1998058752A1 Method and device for reducing or compensating rotational speed losses during insertion of rolling stock in a roll stand |
| 12/29/1998 | US5854877 Economical wide range speed control system |
| 12/24/1998 | DE19725521A1 Elektronisch kommutierter Motor Electronically commutated motor |
| 12/23/1998 | WO1998058446A1 Rotating electric motor system capable of vibrating and method for operating a rotating electric motor capable of vibrating |
| 12/23/1998 | WO1998058442A1 Electronically commutated engine |
| 12/23/1998 | WO1998057878A2 Procedure for regulating the velocity of an elevator, and an elevator system |
| 12/17/1998 | DE4345315C2 Control of frequency converter for use with induction motor |
| 12/16/1998 | CA2208499A1 Electrically audible motorized wheel assembly and method thereof |
| 12/15/1998 | US5850131 Process for driving electric motor-operated awnings |
| 12/08/1998 | US5847525 Control device for asynchronous motor of shutter or roller blind |
| 12/02/1998 | CN1200596A Morotor control apparatus |
| 12/01/1998 | US5844388 Drive systems for a brushless motor employing predefined driving profiles stored in a nonvolatile memory |
| 11/26/1998 | WO1998053551A1 Method for controlling an asynchronous machine |
| 11/25/1998 | CN1199953A Process and control device for motor output suitable for being controlled through communication bus |
| 11/24/1998 | US5841358 Motor current status sensor |
| 11/19/1998 | DE19720697A1 Verfahren zur Steuerung einer Asynchronmaschine Method for controlling an asynchronous machine |
| 11/12/1998 | DE19820667A1 Motor starter control method |
| 11/11/1998 | EP0877470A2 Method and device for power control of an electric load connected to an AC supply network |
| 11/11/1998 | CN1198854A Mechanical vibration detector and vibration damping controller |
| 11/10/1998 | US5834918 Self-tuning tracking controller for permanent-magnet synchronous motors |
| 11/10/1998 | US5834912 Motor speed control device |
| 11/04/1998 | CN1198224A A control system with disturbance predictor and throttle device with electrical actuator |
| 10/27/1998 | US5828200 Motor control system for variable speed induction motors |
| 10/27/1998 | US5828196 Apparatus and method for controlling an electric motor |
| 10/20/1998 | US5825141 Motor control apparatus |
| 10/20/1998 | US5824975 Speed control apparatus for compensating vibration of elevator |
| 10/14/1998 | EP0871285A1 Feedback control system for producing PWM control signals |
| 10/13/1998 | US5821726 Balanced and synchronized phase detector for an AC induction motor controller |
| 09/23/1998 | EP0703344B1 Selfactuating stopping device for a roller blind, especially for a roller shutter |
| 09/17/1998 | WO1998040964A1 Induction motor controller |
| 09/17/1998 | DE19808671A1 Motor control circuit |
| 09/15/1998 | US5808431 Motor rotational speed control apparatus |
| 09/15/1998 | US5808429 Method of and apparatus for controlling motor |
| 09/09/1998 | CN1192607A Variable speed controlling device for induction motor |
| 08/27/1998 | WO1998037493A1 A microprocessor-controlled drive unit for electrically operated devices |
| 08/27/1998 | WO1998037297A1 An operating system for electrically operated devices such as doors, windows and the like, and drive unit for the use in such a system |
| 08/26/1998 | CN1191411A Motor drive |
| 08/20/1998 | DE19704939A1 Output shaft revs regulation method for servo-drive |
| 08/18/1998 | US5796248 Method and apparatus for commutating a three-phase variable reluctance motor |
| 08/18/1998 | US5796235 Process and circuits for determining machine-related electro-magnetic and mechanical state variables on electrodynamic induction machines supplied via converters |
| 08/11/1998 | US5793623 Air conditioning device |
| 08/11/1998 | US5793180 Fully digital drive system for brushless motor with voltage or current profiles read from a digital memory |
| 08/06/1998 | WO1998034332A1 Dynamo-electric machines and control and operating system for the same |
| 08/06/1998 | CA2279337A1 Dynamo-electric machines and control and operating system for the same |
| 08/05/1998 | EP0856846A2 Motor drive method and drive circuit |
| 07/28/1998 | US5786673 Electric motor |
| 07/23/1998 | WO1998032215A1 Balanced and synchronized phase detector for an ac induction motor controller |
| 07/14/1998 | US5780989 Method and apparatus for AC servo motor control |