| 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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| 09/30/1992 | EP0506408A2 Switched reluctance motor control circuit with energy recovery capability |
| 09/24/1992 | DE4109507A1 Longitudinal stator linear electric motor for high-speed train - uses movement of vehicle acting as rotor to couple successive stator sections to frequency regulator |
| 09/17/1992 | WO1992016047A1 Apparatus for controlling load numerically |
| 09/17/1992 | WO1992016046A1 High-speed motor |
| 09/16/1992 | EP0503980A1 Elevator driven by a flat linear motor |
| 09/16/1992 | EP0503879A2 Synchronous motor with permanent magnets and motor system |
| 09/16/1992 | CN1064575A Ac motor drive system |
| 09/15/1992 | US5148070 Apparatus for commutation of an electric motor |
| 09/09/1992 | EP0502578A1 Optical lithographic device having a machine frame with force compensation |
| 09/09/1992 | CN1064378A Ac motor drive system |
| 09/08/1992 | US5146147 Ac motor drive system |
| 09/08/1992 | US5145252 Kneading wing sensing apparatus of microwave oven for baking a bread |
| 09/02/1992 | EP0501634A2 AC motor drive system |
| 09/02/1992 | EP0500963A1 Three-phase reluctance motor |
| 09/02/1992 | EP0500950A1 Reluctance-type motor driving system |
| 09/01/1992 | US5144215 Current supply control apparatus for an inductance load |
| 08/26/1992 | EP0500295A1 Switched reluctance motor position by resonant signal injection |
| 08/20/1992 | WO1992014297A1 High-speed reluctance-type electric motor |
| 08/20/1992 | DE4102263A1 Single phase impedance electromotor with light limiting control - with stator current from semiconductor only switched on when light from LED is not blocked |
| 08/19/1992 | EP0499470A2 AC motor drive system |
| 08/18/1992 | US5140244 Lock detector for switched reluctance machine rotor position estimator |
| 08/18/1992 | US5140243 Discrete position estimator for a switched reluctance machine using a flux-current map comparator |
| 08/12/1992 | EP0498500A1 Appliance at least comprising an electric motor and a circuit for driving the electric motor |
| 08/11/1992 | US5138244 Reluctance-type electric motor |
| 08/11/1992 | US5137428 Ventilating device |
| 08/04/1992 | US5136217 Method for switching current to successive sections of the stator of a long linear motor |
| 08/04/1992 | US5136216 Ac motor drive system |
| 07/29/1992 | EP0148269B1 Servo driving unit |
| 07/21/1992 | US5132599 Velocity control apparatus |
| 07/09/1992 | WO1992011688A1 Phase-control circuit |
| 07/02/1992 | DE4041711A1 Phasenanschnitt-steuerschaltung Phase-angle control circuit |
| 06/23/1992 | US5124604 Disk drive motor |
| 06/17/1992 | EP0490670A2 Induction motor control apparatus |
| 06/16/1992 | US5122697 Hybrid single-phase variable reluctance motor |
| 06/11/1992 | WO1992010025A1 Current controller for inductive load |
| 06/10/1992 | EP0287607B1 A motor energizing circuit |
| 06/09/1992 | US5120983 Device for starting automatically an auxiliary unit when switching on a main unit |
| 06/03/1992 | EP0488805A2 Linear motor device having vibration reduction unit |
| 06/02/1992 | CA1302485C Polyphase machine fed by a pulse-controlled a.c. converter |
| 06/02/1992 | CA1302482C Short-circuit protection device for an electrical machine fed by a pulse-controlled a.c. converter |
| 06/02/1992 | CA1302479C Method and apparatus for controlling the carriage of a linear motor |
| 05/29/1992 | WO1992009139A1 Reluctance type motor |
| 05/26/1992 | CA1301830C Open loop motor control with both voltage and current regulation |
| 05/21/1992 | DE4036565C1 Electronic drive system using variable reluctance electric motor - slows down variations in magnetic induction of stator by electronic control of winding current |
| 05/19/1992 | US5115181 Power converter for a switched reluctance motor |
| 05/19/1992 | US5115172 Phase locked loop speed control circuit for controlling speeds and relative positions of objects |
| 05/14/1992 | WO1992008277A1 Synchronous motors |
| 05/13/1992 | EP0318484A4 System for using synchronous secondaries of a linear motor to biaxially draw plastic films |
| 05/13/1992 | CN1016658B Method and apparatus for controlling ac current resulator of singl-phase or polyphase |
| 05/12/1992 | US5113125 AC drive with optimized torque |
| 05/12/1992 | US5113113 Constant current reluctance motor drive systems |
| 05/06/1992 | EP0483852A2 Power source circuit |
| 05/05/1992 | US5111091 Reluctance type electric motor |
| 04/30/1992 | DE4135276A1 Current supply circuit for universal motor - has circuit which detects effective value of supply AC voltage applied also power determination circuit |
| 04/28/1992 | CA1299641C Cycloconverter drive utilizing a dual stator motor |
| 04/28/1992 | CA1299640C Cycloconverter control system with var regulator |
| 04/22/1992 | EP0481773A1 Improvement of series-excitation motor speed control circuit |
| 04/21/1992 | US5107195 Rotor position estimator for a switched reluctance machine using a lumped parameter flux/current model |
| 04/16/1992 | DE4031708A1 Differential pressure regulation for pump system - shifts pump motor operating point to bring motor current into required range |
| 04/15/1992 | EP0480549A1 AC magnetic floating conveyor and operation method thereof |
| 04/15/1992 | EP0480509A1 Arrangement for supplying energy to a load, as well as a drive system and a sound reproduction system comprising such an arrangement |
| 04/15/1992 | EP0480309A1 Electronic speed regulation device for a universal motor of the collector type used in a food treatment domestic electro-appliance |
| 04/09/1992 | DE4031709A1 Control for capacitor-start motorised pump - employs three comparators of main winding impedance with separate reference values for logic control of triacs |
| 04/02/1992 | WO1992005627A1 Three-phase reluctance motor |
| 03/25/1992 | EP0476751A2 Commutating circuit for a reluctance motor |
| 03/25/1992 | EP0476152A1 Device for driving variable reluctance motor |
| 03/24/1992 | US5099185 Alternating current motor control method |
| 03/17/1992 | US5097192 Controller of a synchronous motor |
| 03/17/1992 | US5097191 Reluctance type electric motor |
| 03/17/1992 | US5097190 Rotor position estimator for a switched reluctance machine |
| 03/17/1992 | US5097161 Linear actuator |
| 03/17/1992 | CA1297528C Electrical machine driven by a pulse-controlled a.c. converter |
| 03/11/1992 | CN1015849B Pulse width modulation type inverter having temp. compensation |
| 03/05/1992 | WO1992003872A1 Reluctance-type motor driving system |
| 03/05/1992 | DE4027135A1 Variable speed electric hand saw - has knob with touch surface(s) used for raising or lowering motor speed |
| 02/25/1992 | US5091684 Servo-control apparatus |
| 02/25/1992 | US5091665 Linear motors |
| 02/25/1992 | US5090516 Elevator linear motor bus bar |
| 02/12/1992 | EP0470685A1 Reluctance motor |
| 02/12/1992 | EP0470672A2 Reluctance motor commutating circuit assembly |
| 02/11/1992 | US5086881 Elevator driven by a flat linear motor |
| 02/06/1992 | DE4125892A1 Microprocessor control system for angular step synchronous motor - includes voltage controlled frequency generator connected with three=phase generator by ramp control across mixing stage |
| 02/06/1992 | DE4023166A1 RPM regulator for AC fan motor - has resistance tapping arranged in load circuit and step switching unit contg. rectifiers |
| 02/04/1992 | US5086491 Electronic control circuit for a/c motors |
| 02/04/1992 | US5086265 Electrical circuit for a centrifuge |
| 01/28/1992 | US5084663 Control arrangement for a reluctance motor |
| 01/28/1992 | US5084662 Unipolar converter for variable reluctance machines |
| 01/23/1992 | WO1992001331A1 Process and circuit for the sensor-less detection of the angle of rotation in a synchronous machine without a damper and preferably excited by a permanent magnet and powered via a converter |
| 01/16/1992 | DE4033737A1 Starting and operating circuit for single phase electromotor - includes first capacitor for starting only and second capacitor with another capacitance only for motor running |
| 01/14/1992 | US5081593 Method and apparatus for monitoring and controlling linear motor robot apparatus and the like |
| 01/14/1992 | US5079924 Circuit for controlling a free-piston engine in particular of a refrigerator compressor |
| 01/02/1992 | DE4120100A1 Three=phase current regulator for synchronous electrical machine - has current for each phase controlled independently with defined band |
| 12/31/1991 | US5077512 Energy conserving electric motor control method and apparatus |
| 12/31/1991 | CA1293768C Power supply systems for reluctance motors |
| 12/26/1991 | WO1991020123A1 Position sensor elimination technique for the switched reluctance motor drive |
| 12/24/1991 | US5075611 Single phase ac motor control device |
| 12/24/1991 | US5075610 Switched reluctance motor control circuit with energy recovery capability |
| 12/12/1991 | DE4017442A1 Separate spindle drive - has a two=phase synchronous motor with two coil groups for synchronised running through switches and frequency converter |
| 12/10/1991 | US5072166 Position sensor elimination technique for the switched reluctance motor drive |
| 12/05/1991 | DE4021559C1 Hand-held electrical power tool with triac controlling motor - has current detecting circuit releasing reset pulse for counter during each half wave of mains voltage |