| 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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| 07/07/1994 | DE4344557A1 Speed controller for commutator motor |
| 06/28/1994 | US5325035 Control device for intermittent operation of an induction motor |
| 06/28/1994 | US5325034 Emergency power system for capacitor start motors |
| 06/28/1994 | US5325030 Voice coil motor driving circuit with retracting function |
| 06/28/1994 | US5325026 Microprocessor-based commutator for electronically commutated motors |
| 06/23/1994 | WO1994014235A1 Controller for energization of reluctance motor |
| 06/22/1994 | EP0603071A2 Sensorless switched reluctance motor |
| 06/15/1994 | EP0601189A1 Reluctance motor capable of regenerative braking and direct current motor |
| 06/15/1994 | CN1025065C Operation control circuit for pump motor |
| 06/14/1994 | US5321635 Synchro drive stabilization system |
| 06/09/1994 | DE4341135A1 Control of synchronous motor used e.g. in machine tool - controlling magnitude and phase of currents in winding carrying both field and armature current components |
| 06/08/1994 | EP0600706A1 Voice coil driver with variable gain in seek and track-follow modes |
| 06/07/1994 | US5319297 Driving system for reluctance type motor |
| 06/01/1994 | EP0599334A2 Method for driving a reluctance motor |
| 05/24/1994 | US5315224 Method and an arrangement for starting an electrical machine having varying reluctance |
| 05/18/1994 | EP0597413A1 Tool turret |
| 05/18/1994 | EP0597118A1 Control method for synchronous motor |
| 05/17/1994 | US5313149 Current supply control apparatus for inductance load |
| 05/04/1994 | EP0594907A1 Speed limiting circuit for universal type series or compound electric motor |
| 05/04/1994 | EP0594906A1 Governor circuit for universal series (or compound) motor |
| 04/19/1994 | US5304882 Variable reluctance motors with permanent magnet excitation |
| 04/14/1994 | WO1994008391A1 Circuit and method for driving variable reluctance motor |
| 04/14/1994 | WO1994008390A1 Sensing of rotor position of a switched reluctance motor without a shaft position sensor |
| 04/14/1994 | DE4233804A1 Control of permanent magnet synchronous machine - adjusting pilot angle between armature current and voltage in proportion to output of phase current regulator |
| 04/14/1994 | CA2145282A1 Sensing of rotor position of a switched reluctance motor without a shaft position sensor |
| 04/12/1994 | US5302884 Power supply system and method for linear stator motor |
| 04/06/1994 | EP0590377A2 Braking circuit for an electric motor |
| 03/31/1994 | WO1994007301A1 Process and device for regulating a converter-powered, permanently excited synchronous motor |
| 03/31/1994 | DE4232133A1 Supply circuit for two=phase asynchronous electric motor - with common supply voltage at one end of each winding and 180 degree offset voltages at opposite winding ends |
| 03/30/1994 | EP0589525A1 Switching device for driving an asynchronous two-phase motor |
| 03/30/1994 | EP0388464B1 Control device |
| 03/23/1994 | EP0588057A2 Method for optimizing the operation of an electric hand tool |
| 03/23/1994 | EP0587818A1 Fan installation. |
| 03/22/1994 | US5297024 Voice coil driver with variable gain in seek and track-follow modes |
| 03/22/1994 | US5296793 State observer for synchronous motors |
| 03/17/1994 | WO1994006114A1 Process and device for controlling with pulsed signals |
| 03/15/1994 | US5294856 Shifted pole single phase variable reluctance motor |
| 03/15/1994 | US5294850 Electromagnetic accelerator in flat coil arrangement |
| 03/10/1994 | DE4229342A1 Verfahren und Vorrichtung zur Ansteuerung mit gepulsten Signalen Method and apparatus for driving with pulsed signals |
| 03/08/1994 | US5293137 Digital transducer system including two reactive transducers forming resonant oscillator circuits |
| 03/03/1994 | DE4229045A1 Commutator motor speed, direction and angle sensor for vehicle sliding roof or electric window - extends segment of commutator to L=shaped track which runs along circumference of commutator, and has sliding contact for sensing voltage of extended track |
| 03/01/1994 | US5291115 Method and apparatus for sensing the rotor position of a switched reluctance motor without a shaft position sensor |
| 02/22/1994 | US5289089 Motor drive circuit and motor drive system using the circuit thereof |
| 02/09/1994 | EP0582516A1 Electronic speed control device of a motor |
| 02/02/1994 | CN1023667C Method and system for controlling a machine tool such as a turning machine |
| 01/26/1994 | EP0579694A1 Process and circuits for determining machine-related electromagnetic and mechanical state variables on electrodynamic induction machines supplied via converters. |
| 01/25/1994 | US5281956 Heater diagnostics and electronic control for a clothes dryer |
| 01/25/1994 | US5281903 Method for drivingly controlling a variable reluctance type motor |
| 01/20/1994 | WO1994001919A1 Fault-tolerant reluctance motor |
| 01/19/1994 | EP0579015A2 Switching device for the generation of a speed-proportional pulse train |
| 01/18/1994 | US5280227 Motor control for a refuse compact having a refuse receptacle |
| 01/18/1994 | US5280222 Apparatus and method for controlling brushless electric motors and position encoders and indicating position thereof |
| 01/13/1994 | DE4222370A1 Fehlertoleranter Reluktanzmotor Fault-tolerant reluctance motor |
| 01/12/1994 | EP0577843A1 Reluctance motor and rotor of high-speed reluctance motor |
| 01/12/1994 | CN1023530C Synchronous motor controlling system |
| 01/11/1994 | US5278482 Three-phase reluctance type motor |
| 01/06/1994 | WO1994000909A1 Reluctance motor capable of regenerative braking and direct current motor |
| 01/04/1994 | US5276392 Single phase AC motor speed control system |
| 12/29/1993 | EP0575911A2 Speed control device of an electric motor and method of operation |
| 12/28/1993 | US5274541 Parallel circuit module including a diode and an IGBT |
| 12/28/1993 | US5274287 High-speed motor |
| 12/22/1993 | EP0407590B1 Servo control apparatus |
| 12/21/1993 | US5272424 Generating device of phase current instruction value for alternating current servomotor and the generating method thereof |
| 12/15/1993 | EP0394268B1 Motorised faders |
| 12/14/1993 | US5270633 Ternary energy supply circuit with a high frequency rejection filter |
| 12/09/1993 | WO1993024992A1 Digital transducer system |
| 12/09/1993 | WO1993024990A1 Control method for synchronous motor |
| 12/09/1993 | DE4311597A1 Measuring linear or rotary motion of electric motor - ascertaining rotor or secondary part speed, position, torque or force and deriving transfer model parameters |
| 12/08/1993 | EP0573198A1 Sensorless rotor position measurement in electric machines |
| 12/07/1993 | US5268627 Start assisting device for high speed reluctance motor |
| 12/01/1993 | EP0363416B1 Power system for supplying power to a motor |
| 11/30/1993 | US5266854 Electromagnetic transducer |
| 11/25/1993 | WO1993023918A1 Variable reluctance drive system |
| 11/25/1993 | CA2134896A1 Variable reluctance drive system |
| 11/24/1993 | EP0570672A1 Variable speed asynchronous induction motor |
| 11/23/1993 | US5264772 Numerically controlled load actuating apparatus |
| 11/18/1993 | EP0569588A1 Device for controlling current application to inductance coil |
| 11/14/1993 | CA2095669A1 Synchronous machine |
| 11/11/1993 | WO1993022717A1 Motor driven step switch |
| 11/11/1993 | DE4214431A1 Motorantrieb für Stufenschalter Motor drive for tap changers |
| 11/09/1993 | US5260635 Reluctance motor |
| 10/28/1993 | WO1993021686A1 Circuit arrangement for mitigating power switch capacitance |
| 10/19/1993 | US5254913 Speed limiting circuit for universal type series or compound electric motor |
| 10/13/1993 | EP0564663A1 High speed motor |
| 10/12/1993 | US5252907 Circuit arrangement for mitigating power switch capacitance |
| 10/12/1993 | US5252905 Driving system for single phase A-C induction motor |
| 10/06/1993 | EP0564378A1 Low speed regulation method for a motor |
| 09/30/1993 | DE4210273A1 Power driver, for nut running, with torque limiting function - uses comparison of motor load with preset reference as input to phase gate control circuit of motor |
| 09/29/1993 | EP0562673A2 Asynchronous motor speed control method and device |
| 09/21/1993 | US5247230 Unilateral diac for motor speed control |
| 09/16/1993 | WO1993018577A1 Method and apparatus for correcting hysteresis synchronous motor hunting |
| 09/15/1993 | EP0560186A2 Pilot circuit of an electric motor, of the type used for producing the rotation of a drum of a laundry washing machine |
| 09/14/1993 | US5245260 Motor drive circuit with electronic fault protection |
| 09/08/1993 | EP0458794B1 Process and device for controlling single-phase or multiphase a.c. controllers |
| 09/07/1993 | US5243268 Electric machine system |
| 08/31/1993 | US5241254 Dc feedback firing control circuit for a dc/three-phase current converter |
| 08/25/1993 | EP0557242A1 Drive system for a woollen card and a card |
| 08/24/1993 | US5239252 Method and apparatus for controlling single or multiphase a.c. power controllers |
| 08/19/1993 | DE4204645A1 Current limiting circuit for electromotors - has light source, rotor-mounted shutter disk and phototransistor triggering RC circuit discharge to limit stator current duration |
| 08/18/1993 | EP0556117A2 Start assisting device for high speed reluctance motor |