| Patents for H02P 25 - Arrangements or methods for the control of ac-motors characterised by the kind of ac-motor or by structural details (7,591) |
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| 05/26/1998 | US5757596 Motor control assembly and method of controlling same |
| 05/26/1998 | US5757162 Method and apparatus for operating an electric induction motor with a long and lossy extension cord |
| 05/20/1998 | EP0843405A2 An electric machine |
| 05/20/1998 | EP0719473B1 Pulse width modulating motor controller |
| 05/19/1998 | US5754024 Control device for switched reluctance motor |
| 05/19/1998 | US5754019 Method and circuit arrangement for operating an electric motor |
| 05/13/1998 | EP0841293A1 Optimization of magnetizing current in linear induction motors |
| 05/13/1998 | CN1181657A Speed control apparatus for switched reluctance motor |
| 05/13/1998 | CN1038378C Single-phase induction motor, its control method and use in refrigerator |
| 05/07/1998 | WO1998019388A2 Speed control for the fan motor of a hot-air appliance |
| 05/07/1998 | WO1998019386A1 Two-wire brushless dc motor control system |
| 05/06/1998 | EP0840438A2 Switched reluctance motor driving circuit |
| 05/06/1998 | EP0840437A1 Control circuit for two speed motors |
| 05/06/1998 | EP0840436A1 Control circuit for two speed motors |
| 05/06/1998 | EP0840435A2 Motor control circuit |
| 05/05/1998 | US5747962 Method and apparatus for increasing the starting torque of a two-phase switched reluctance motor |
| 05/05/1998 | US5747958 Circuit arrangement for powering a two-phase asynchronous motor |
| 05/05/1998 | US5747953 Cordless, battery operated surical tool |
| 05/05/1998 | US5747952 Linear motor, apparatus, armature coil current supply circuit for linear motor, and method of supplying current to armature coil of linear motor |
| 04/29/1998 | EP0788678B1 Method and device for load power control via a phase adjustment system |
| 04/28/1998 | US5743351 Method and apparatus for controlling an electric assist steering sysem by linearizing system input-output torque gain |
| 04/23/1998 | DE19748647A1 Electromagnetic drive system with integral travel signal generation |
| 04/23/1998 | DE19641713A1 Method of switching off torque of electric motor |
| 04/22/1998 | EP0836763A1 Switched reluctance electric machine system |
| 04/22/1998 | EP0836761A1 Doubly salient permanent magnet machine with field weakening (or boosting) capability |
| 04/21/1998 | US5742146 Drive circuit for a switched reluctance motor with improved energy recovery using a common dump capacitor and recovering phase circuit |
| 04/21/1998 | US5742139 Method and apparatus for reducing noise in a variable reluctance motor |
| 04/16/1998 | DE19642098A1 Drive for oil-tight vacuum pump esp rotary disc vacuum pump |
| 04/16/1998 | DE19642097A1 Drive for oil-tight vacuum pump, esp. a rotary disc vacuum pump |
| 04/15/1998 | EP0836269A1 Speed control device for motors with collectors |
| 04/14/1998 | US5739663 Phase energization controller and method for controlling switched reluctance machines using simple angular position sensors with improved angle interpolation |
| 04/14/1998 | US5739662 Low cost drive for a reluctance machine having fully-pitched windings |
| 04/14/1998 | US5739613 Flat three-phase reluctance type motor |
| 04/09/1998 | WO1998015052A1 Pulse duration modulated switched reluctance motor control |
| 04/08/1998 | EP0834789A1 Self-regulating motor-driven pump unit |
| 04/07/1998 | US5737164 Switched reluctance machine capable of improved fault operation |
| 04/07/1998 | US5736884 Device for generating a control signal dependent on a variable resistance value and apparatus comprising such device |
| 04/07/1998 | US5736829 High-speed constant-horsepower motor |
| 04/07/1998 | US5736828 Electric machine controller |
| 04/07/1998 | US5736827 Motor driven step switch |
| 04/02/1998 | WO1998013283A1 Transportation system and apparatus for remote handling |
| 04/01/1998 | EP0833434A1 Synchronous motor synchronising method and device |
| 04/01/1998 | EP0833432A2 Speed control to supply DC universal motors |
| 03/26/1998 | WO1998012737A1 Magnetically levitated robot and method of increasing levitation force |
| 03/25/1998 | EP0830832A2 Vacuum cleaner driven by an electric motor |
| 03/18/1998 | EP0829130A1 Switched reluctance motor with indirect position sensing and magnetic brake |
| 03/17/1998 | US5729112 Phase current sensing in a bifilar-wound switched reluctance motor drive topology |
| 03/17/1998 | US5729067 Method and apparatus for closed loop position control in a linear motor system |
| 03/12/1998 | DE19634449A1 Steuerungsvorrichtung für linearmotor-getriebene Einrichtungen Controller for linear-motor-driven equipment |
| 03/11/1998 | CN1175816A Method and apparatus for control of rotary magnet type polyphase synchronous motor |
| 03/11/1998 | CN1175815A Load control device |
| 03/05/1998 | WO1998008702A1 Controller for devices driven by linear motors |
| 03/03/1998 | US5724477 Compensation for input voltage variation in an electric motor drive |
| 03/03/1998 | US5723914 Device for preventing an electrical equipment from re-powering after recovery of service interruption |
| 03/03/1998 | US5723858 Position encoder with fault indicator |
| 03/03/1998 | US5722930 Reciprocating pump circulatory assist arrangement |
| 03/03/1998 | US5722429 Connecting arrangement for medical device |
| 02/17/1998 | US5720010 Control system for a linear actuator including magnetic bearings for levitating a robot arm |
| 02/10/1998 | US5717592 Method and system for engine throttle control |
| 02/05/1998 | WO1998005115A1 Method and apparatus for reducing noise in a variable reluctance motor |
| 02/05/1998 | WO1998005112A1 Electrical machines |
| 02/04/1998 | EP0822646A2 Load control device |
| 02/04/1998 | EP0822315A2 Circuitry for controlling electrically powered drives for roller blinds |
| 02/04/1998 | EP0821845A1 Method and apparatus for hybrid direct-indirect control of a switched reluctance motor |
| 02/03/1998 | US5714861 Variable speed control for a hand-held electric power tool |
| 02/03/1998 | US5714857 Current regulation process for a three-phase, static-converter-fed, permanently excited synchronous machine |
| 01/22/1998 | WO1998002957A1 Switched reluctance machine capable of improved fault operation |
| 01/22/1998 | CA2260030A1 Switched reluctance machine capable of improved fault operation |
| 01/21/1998 | EP0820142A1 Ac motor with reactor connected to power source |
| 01/21/1998 | EP0632572B1 Controller for energization of reluctance motor |
| 01/15/1998 | WO1998001943A1 Synchronous sampling circuit for a sensorless switched reluctance machine system |
| 01/15/1998 | WO1998001942A1 Absolute angle estimation apparatus for a sensorless switched reluctance machine system |
| 01/15/1998 | WO1998001932A1 Reluctance machine with fractional pitch winding and drive therefor |
| 01/15/1998 | CA2260112A1 Absolute angle estimation apparatus for a sensorless switched reluctance machine system |
| 01/15/1998 | CA2260036A1 Synchronous sampling circuit for a sensorless switched reluctance machine system |
| 01/14/1998 | EP0784884B1 Electric tool, in particular a screw-driving tool |
| 01/14/1998 | CN1170275A Driving circuit for switched reluctance motor |
| 01/07/1998 | CN1169620A Electric motor controller and method |
| 01/07/1998 | CN1169619A Microprocessor based motor control system with phase difference detection |
| 01/07/1998 | CN1036968C Device to regulate speed of electric motor and its operation method |
| 01/06/1998 | CA2088626C Load-control circuit for a mains-powered asynchronous single-phase capacitor motor |
| 12/31/1997 | CN1169214A Device for controlling speed of series motor |
| 12/30/1997 | US5703458 Capacitor-type motor speed controller |
| 12/30/1997 | US5703457 Power supply to a stator of a polyphase reluctance machine |
| 12/30/1997 | US5703456 Power converter and control system for a motor using an inductive load and method of doing the same |
| 12/30/1997 | US5702430 Surgically implantable power supply |
| 12/29/1997 | EP0769133A4 Switched reluctance machine having unbalance forces compensation coils |
| 12/29/1997 | EP0667009B1 Motor driven step switch |
| 12/23/1997 | US5701065 Method and apparatus for controlling synchronous motor |
| 12/23/1997 | US5701064 Rotor position sensing in a dynamoelectric machine using coupling between machine coils |
| 12/23/1997 | CA2008127C Method and apparatus for controlling a single-or polyphase a.c. controller |
| 12/18/1997 | WO1997048172A1 Reluctance machine with permanent magnet rotor excitations |
| 12/17/1997 | EP0813293A1 Electric motor controller and method |
| 12/17/1997 | EP0813289A1 Rotor position encoder for an electrical machine |
| 12/16/1997 | US5698910 Electromagnetic actuator with position sensor |
| 12/11/1997 | WO1997046924A1 Motor-regulating device and method |
| 12/11/1997 | DE19622699A1 Regeleinrichtung und -verfahren für Motoren Control system and procedures for engines |
| 12/10/1997 | EP0812057A1 Switched reluctance motor provided with rotor position detection |
| 12/10/1997 | EP0812056A1 Switched reluctance motor provided with rotor position detection |
| 12/10/1997 | EP0700594B1 Electric motor drive |