| Patents for H02P 8 - Arrangements for controlling dynamo-electric motors rotating step by step (4,097) |
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| 09/17/2009 | US20090230339 Valve Control Apparatus and Flow Rate Controller |
| 09/17/2009 | CA2718027A1 Stepper motor driven proportional actuator |
| 09/16/2009 | CN201312279Y Electric displacement platform and electric displacement platform controller |
| 09/16/2009 | CN101534089A Asynchronous control stepping motor array |
| 09/16/2009 | CN101533260A Method for generating pulse of digital differential analyzer |
| 09/16/2009 | CN100542006C Motor control device |
| 09/16/2009 | CN100542005C Motor driver and recording apparatus incorporating the same |
| 09/11/2009 | WO2009111155A1 Stepper motor driven proportional fuel metering valve |
| 09/11/2009 | WO2009110602A1 Electronic watch |
| 09/11/2009 | CA2716570A1 Stepper motor driven proportional fuel metering valve |
| 09/10/2009 | US20090224719 Image Sensing Apparatus |
| 09/09/2009 | EP1433248B1 Stepper motor controller |
| 09/09/2009 | CN100538559C Analog electronic clock and motor control circuit |
| 09/08/2009 | CA2646565C Integrated enclosure and controller for video surveillance camera |
| 09/01/2009 | US7583045 Stepping motor control apparatus, stepping motor control method and stepping motor control program product |
| 08/26/2009 | EP1597642B1 Pulse output function for programmable logic controller with linear frequency change |
| 08/26/2009 | CN101515779A Apparatus and method of driving stepping motor of analog electronic clock |
| 08/20/2009 | WO2009101676A1 Motor drive device |
| 08/20/2009 | US20090206789 Device and method of driving stepping motor of analog electronic clock |
| 08/20/2009 | US20090206788 Motor driver supplying drive current while adjusting decay rate thereof |
| 08/19/2009 | CN201294477Y Stepper motor subdivision drive circuit |
| 08/19/2009 | CN201290231Y Automatic variable fertilizer distributor controlled by stepping motor |
| 08/06/2009 | WO2008084500A3 A method for noise reduction in stepper motors during homing and system thereof |
| 08/06/2009 | US20090193923 Motor control apparatus |
| 08/05/2009 | CN201286079Y Step motor time clock computer timing control apparatus |
| 08/05/2009 | CN101499764A Monitoring system and method for stepping motor |
| 08/05/2009 | CN101498251A Control method for idle speed step motor |
| 08/05/2009 | CN100525065C Vibration generation stepping motor stop control method and stop control device |
| 07/30/2009 | US20090190280 Current limiter circuit and motor drive circuit |
| 07/29/2009 | EP2082476A2 A method and apparatus for eliminating stall and cogging in multi-phase stepping motors |
| 07/29/2009 | EP2082475A2 Wireless rotisserie |
| 07/23/2009 | WO2009071267A3 Method and device for detecting step losses of a step motor |
| 07/23/2009 | US20090184677 System and method for using a stepper motor as a rotary sensor |
| 07/16/2009 | US20090179635 System and Methods for Determining Motor Position |
| 07/16/2009 | DE102008055077A1 Verfahren und Vorrichtung zur Hochgeschwindigkeitserkennung eines Blockierzustands in einem Schrittmotor Method and apparatus for high-speed detection of a stall condition in a stepping motor |
| 07/09/2009 | WO2009086114A1 System and methods for determining motor position |
| 07/09/2009 | US20090174358 Method and apparatus for high speed stepper motor stall detection |
| 07/08/2009 | CN201270492Y Step motor used in automobile combined instrument |
| 07/02/2009 | US20090167232 Drive control device for a stepper motor and drive control method of the stepper motor |
| 07/02/2009 | DE102008054545A1 Verfahren und Vorrichtung zur Blockierzustandserkennung in einem Schrittmotor Method and device for locking state recognition in a step motor |
| 07/01/2009 | CN101471621A Drive circuit board for hard disk assembly line corner stepper motor and method of processing the same |
| 07/01/2009 | CN101471620A Drive control device for a stepper motor and drive control method of the stepper motor |
| 06/25/2009 | US20090160390 Method and apparatus for stepper motor stall detection |
| 06/18/2009 | WO2009034252A3 Method for powering an electromagnetic actuator according to two powering configurations and corresponding actuation device |
| 06/18/2009 | US20090153093 Method and controller for detecting a stall condition in a stepping motor during micro-stepping |
| 06/17/2009 | EP2071718A1 Stepping motor drive control device and drive control method |
| 06/17/2009 | CN101459403A Drive signal generation circuit |
| 06/11/2009 | WO2009071267A2 Method and device for detecting step losses of a step motor |
| 06/11/2009 | CA2703609A1 Method and device for detecting step losses of a step motor |
| 06/10/2009 | EP2068436A1 Method and device for identifying step loss in a stepper motor |
| 06/10/2009 | DE102007040166A1 Motor control device for application of motor with multiple independent phase coils, has multiple operating units of inverter type for operation of appropriate phase coils, and has multiple pulse width modulated control unit |
| 06/10/2009 | CN101453186A Control circuit for synchronous operation of two or more stepping motors |
| 06/10/2009 | CN100498495C Stepping motor control circuit, electronic camera, and stepping motor control method |
| 06/03/2009 | CN201252512Y Stepper motor driving power supply |
| 06/03/2009 | CN201252511Y Novel stepper motor drive controller |
| 06/02/2009 | US7541768 Step motor control circuit and method of generating step motor control signal |
| 06/02/2009 | US7541763 Servo control device |
| 05/27/2009 | CN201248025Y Control card for step-by-step motor |
| 05/27/2009 | CN201246022Y Control drive circuit of electric rolling door linkage control lock |
| 05/27/2009 | CN100492867C Coutrol device for electric booster steering system |
| 05/26/2009 | US7538513 Step motor drive circuit and analog electronic timepiece |
| 05/12/2009 | CA2512707C Automatic closure of containers |
| 05/07/2009 | WO2009057407A1 Conveying apparatus and printer apparatus |
| 05/06/2009 | CN101425772A Dynamic data collection system and accurately positioning method for collection position |
| 05/06/2009 | CN101424946A Pulse positioning system and method for compensating pulse positioning error thereof |
| 05/05/2009 | US7528567 Safety interlock system and method for disrupting stepper motor control signals |
| 04/30/2009 | DE102008051610A1 Schrittmotor-Antriebsvorrichtung Step motor driving device |
| 04/29/2009 | CN201230202Y Synchronous electric machine step failing out detection device |
| 04/29/2009 | CN101420200A General speed controller for electricity generator |
| 04/29/2009 | CN100483274C Drive unit for digital control pointer type meters in cars, and drive method |
| 04/23/2009 | DE102007050710A1 Inductive load e.g. stepper motor, operating method, involves detecting voltage between control connection of transistor and bridge center, and terminating switching operation of transistor when voltage exceeds predetermined value |
| 04/15/2009 | EP2048029A1 Car-mounted head light control device, car-mounted head light control system and car-mounted head light, and, high-brightness discharge lamp control device, high-brightness discharge lamp control system and car-mounted head light |
| 04/15/2009 | CN101409525A Driving device of stepping motor |
| 04/09/2009 | US20090091288 Return-to-zero control method for a stepper motor |
| 04/08/2009 | EP1654800A4 A method and apparatus for improved low current accuracy in multi-phase step motors |
| 04/08/2009 | CN100477457C Fan motor |
| 04/02/2009 | WO2008155294A3 Method and circuit arrangement for operating a brushless dc motor |
| 04/02/2009 | US20090085509 Stepper motor device with compensating non-sinusoidal driving values and method of producing the driving values |
| 04/02/2009 | DE102004033399B4 Schaltung zur Ansteuerung mehrerer miteinander gekoppelter Schrittmotoren Circuit for driving a plurality of interlocking stepper motors |
| 04/01/2009 | EP2042842A1 Pointer measuring instrument |
| 04/01/2009 | CN100474756C Waveform output device and drive device |
| 04/01/2009 | CN100474190C Pulse output function for programmable logic controller |
| 03/26/2009 | WO2005043730A3 A method to reduce midrange resonance during operation of a multi-phase step motor |
| 03/26/2009 | DE102007043930A1 Control device for stepping motor, has computing unit for computing deviation between position instruction and rotor position, and another computing unit for computing rotor speed instruction on basis of position instruction |
| 03/25/2009 | EP2040134A1 Electronic clock |
| 03/19/2009 | WO2009034252A2 Method for powering an electromagnetic actuator according to two powering configurations and corresponding actuation device |
| 03/19/2009 | WO2008156541A3 Calibrating stepper motor by driving fractional ranges |
| 03/19/2009 | US20090072907 Electric circuit |
| 03/18/2009 | CN101388635A Stepping motor drive and stepping motor driving method |
| 03/18/2009 | CN101388634A Step motor controlling method |
| 03/17/2009 | US7504793 DC motor driving method for reducing adverse RF interferences and application to a vehicle lighting or signaling device |
| 03/17/2009 | US7504785 System for controlling an electrostatic stepper motor |
| 03/12/2009 | WO2009033080A2 System and method for generating a drive signal |
| 03/11/2009 | CN101383575A Determining device and method for step motor stop state |
| 03/11/2009 | CN100468180C Driving device and light-amount adjusting device provided with the same |
| 03/04/2009 | CN201202392Y Motor control device |
| 03/03/2009 | CA2411389C Integrated enclosure and controller for video surveillance camera |
| 02/25/2009 | CN101373947A Method, apparatus and system for controlling stepper motor speed |
| 02/25/2009 | CN100464492C Constant current driver for step motor |
| 02/19/2009 | DE102008034528A1 Schrittmotor-Steuerapparat Stepper motor control apparatus |