| Patents for H02P 8 - Arrangements for controlling dynamo-electric motors rotating step by step (4,097) |
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| 09/12/1990 | EP0386292A1 Method and device to control stepper motors |
| 09/11/1990 | US4956595 Driving circuit for a five-phase stepping motor |
| 09/06/1990 | DE3906838A1 Method for driving, in particular, a 5-phase stepping motor |
| 08/23/1990 | DE3904441A1 Chopper circuit for driving the coils of electromagnets and/or stepper motors, especially for a matrix printer |
| 08/22/1990 | EP0382887A1 Stepper motor motion sensor |
| 08/14/1990 | US4949027 Arrangement for and method of operating an electric step motor |
| 08/08/1990 | EP0381519A2 Stepper motor torque variance compensation using varied applied voltage |
| 08/07/1990 | US4947097 Automatic switching of motion control with tactile feedback |
| 08/03/1990 | CA2009154A1 Stepper motor torque variance compensation using varied applied voltage |
| 06/20/1990 | CN1008497B Efficiently driving source for step motor |
| 06/20/1990 | CN1008496B Driving circuit used for the motor with switch style reluctance |
| 06/12/1990 | US4933619 Stepping motor servo control system for a floppy disk drive |
| 06/06/1990 | CN1008315B Driving power supply for step electric motor |
| 05/30/1990 | EP0370105A1 Digital follow-up system |
| 05/29/1990 | US4929879 To control the amount of torque output |
| 05/23/1990 | EP0369954A1 Multipurpose, internally configurable integrated circuit for driving in a switching mode external inductive loads according to a selectable connection scheme |
| 05/22/1990 | US4928051 Electric motor |
| 05/22/1990 | US4928050 Recorder |
| 05/22/1990 | US4928049 Circuit for controlling current switching in multiple inductive loads, with single current detector, particularly for windings of step motors |
| 05/22/1990 | CA1269435A1 Mechanism for positioning an output member |
| 05/15/1990 | US4926270 Driving method for a stepping motor and sheet conveying apparatus using the driving method |
| 05/15/1990 | US4926077 Resistance compensation in a motor using a thermally variable resistive network |
| 05/09/1990 | EP0367693A1 Method to stop stepping motors |
| 05/08/1990 | US4924167 Rotor movement warning device for use in stepper motors |
| 05/03/1990 | DE3836531A1 Stepper motor controller |
| 05/02/1990 | EP0366620A1 A circuit for controlling a direct-current motor |
| 04/17/1990 | US4918365 Electromechanical actuator having control and drive circuit |
| 04/10/1990 | US4916378 Inductive load discharge current recirculation circuit with selectable "fast" and "low" modes |
| 04/04/1990 | EP0361209A1 Process and device for detecting the instant a rotor of a stepper motor passes a predetermined position, and process for controlling this motor |
| 04/03/1990 | US4914369 Disc drive with improved storage capacity |
| 03/27/1990 | US4912389 Rotary position detector for stepping motor |
| 03/14/1990 | EP0358057A2 Drive arrangement for an oscillating polarizer |
| 03/14/1990 | CN1007195B Driving circuit for slepping motor |
| 03/14/1990 | CN1007194B Driving circuit for energy saving steping motor |
| 03/13/1990 | US4908562 Method and apparatus for controlling the magnitude and direction of a current through a winding |
| 03/06/1990 | US4906910 Drive circuit for a stepping motor control device |
| 02/27/1990 | US4904917 Drive apparatus |
| 02/13/1990 | US4901000 Variable rate stepper motor driver circuit and method |
| 02/08/1990 | WO1990001231A1 Resistance compensation in a motor using a thermally variable resistive network |
| 02/06/1990 | CA1265568A1 Linear stepping motor |
| 01/24/1990 | EP0352238A2 Inductive load discharge current recirculation circuit with selectable "fast" and "slow" modes |
| 01/24/1990 | EP0351888A2 Disk unit |
| 01/03/1990 | EP0349447A1 Motor control circuit with a step or self-commutation mode |
| 12/26/1989 | US4890048 Low torque ripple stepping motor controller circuit |
| 12/21/1989 | DE3819825A1 Motor drive device |
| 12/20/1989 | CN2049845U Changeable fine dividing type electric source for driving step motor |
| 12/19/1989 | US4888542 Driving method of a stepping motor |
| 12/19/1989 | US4888541 Method and apparatus for controlling stepmotor mechanical drives |
| 12/06/1989 | EP0345224A1 Power supply method for a monophased stepping motor for a time piece |
| 11/29/1989 | CN1037612A Fast drive circuit of electromagnetic winding |
| 11/21/1989 | US4882530 Stepping motor control apparatus |
| 11/16/1989 | DE3915576A1 Control circuit for a pulse motor (impulse motor) |
| 11/15/1989 | EP0341582A1 Control method for a bidirectional step motor, and bidirectional step motor controlled by this method |
| 11/07/1989 | CA1262763A1 Method and apparatus for the synchronization of a moveable material web and an optical deflection path |
| 10/19/1989 | DE3911478A1 Motorantriebseinrichtung Motor drive means |
| 10/18/1989 | CN1036488A Pulse-synchronizing speed-regulated dc motor |
| 10/17/1989 | US4874993 Sensorless brushless motor |
| 10/10/1989 | US4873477 Driving circuit for actuator |
| 10/04/1989 | EP0335568A2 Stepping motors |
| 10/04/1989 | CN1036111A Efficiently driving source for step motor |
| 09/27/1989 | EP0334160A2 Device for load angle adjustment of an electric stepper motor |
| 09/26/1989 | US4869610 Carriage control system for printer |
| 09/26/1989 | CA1259837A1 Phase locked stepper motor controlled light chopper |
| 09/08/1989 | WO1989008349A1 Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus and power supply means for such electronic power switching apparatus |
| 09/05/1989 | US4864199 Electronically controlled electric motor with variable power output |
| 08/29/1989 | US4862051 Stepping motor's negative-phase braking control device |
| 08/24/1989 | WO1989007859A1 Microstepping of a unipolar d.c. motor |
| 08/24/1989 | WO1989007789A1 Digital follow-up system |
| 08/22/1989 | US4859923 Microprocessor controlled dual channel closed loop controller for stepper motors used in servo systems |
| 08/16/1989 | EP0327989A1 Stepper motor control circuit, especially for watches |
| 08/15/1989 | US4857817 Drive circuit for stepping motor |
| 08/15/1989 | CA1258483A1 Microprocessor stepper motor drive |
| 08/08/1989 | US4855660 Microstepping of an unipolar stepping motor |
| 07/26/1989 | CN2041868U Driving system of stepmotor with dynamic regulating |
| 07/25/1989 | US4851755 Low power stepper motor drive system and method |
| 07/19/1989 | EP0324531A2 Brake-initiated release of an electric motor driven cruise control apparatus |
| 07/18/1989 | US4849651 Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus and power supply means for such electronic power switching apparatus |
| 07/11/1989 | US4847544 Microcomputer control of stepper motor using reduced number of parts |
| 07/04/1989 | US4845417 Driver for stepping motor |
| 06/28/1989 | EP0322386A1 Method and apparatus for controlling the magnitude and direction of a current through a winding |
| 06/20/1989 | US4841214 Control device for a stepping motor |
| 06/15/1989 | WO1989005539A1 Driving motor |
| 06/14/1989 | EP0320163A1 Position control system |
| 06/06/1989 | US4837493 System for driving drum |
| 05/30/1989 | US4835451 Switching circuit for five-phase stepping motor and method of switching |
| 05/23/1989 | US4833593 Method for preparing information tables for a digital valve control apparatus |
| 05/23/1989 | US4833385 Method for the phase synchronization of step-drive controlled equipment |
| 05/23/1989 | US4833372 Control circuit for electric motor |
| 05/17/1989 | EP0316077A1 Brushless motors |
| 05/17/1989 | CN2037900U Synchronous-compensation pulse-power driving system |
| 05/16/1989 | US4831471 System for positioning a magnetic head at a center line of a floppy disk track |
| 05/16/1989 | US4831320 Duty factor control method |
| 05/09/1989 | US4829222 Stepper motor driver control circuit |
| 05/05/1989 | WO1989004085A1 Method and apparatus for determining shaft loading and shaft position of a stepmotor |
| 05/02/1989 | US4827203 Rotor rotational position detector for a motor |
| 04/26/1989 | EP0313046A1 Motor control apparatus |
| 04/26/1989 | EP0312553A1 Stepping motor controller |
| 04/25/1989 | US4825133 Electromechanical actuator control system |
| 04/25/1989 | US4823749 Device for controlling the intake air in an internal combustion engine |
| 04/12/1989 | EP0311095A2 Pulse motor control apparatus |