| Patents for H02P 8 - Arrangements for controlling dynamo-electric motors rotating step by step (4,097) |
|---|
| 04/12/1989 | EP0310858A2 Circuit for controlling current switching in multiple inductive loads, with single current detector, particularly for windings of step motors |
| 04/11/1989 | US4820963 Driving device for step motor |
| 04/05/1989 | EP0309999A2 Method and apparatus for driving stepping motor |
| 03/22/1989 | EP0308126A2 A drive circuit for an actuator |
| 03/14/1989 | US4812727 Stepping motor drive device |
| 03/08/1989 | EP0306437A2 Chopper circuit for the control of coils of electromagnets or step motors, particularly for a matrix printer |
| 03/08/1989 | EP0305876A2 Stepper motor shaft position sensor |
| 03/01/1989 | EP0304704A1 Method and apparatus for driving a stepper motor with multiple voltages |
| 02/28/1989 | US4807548 Electric motor drive for a sewing machine, especially an industrial sewing machine |
| 02/07/1989 | US4803415 Stepper motor control circuit and apparatus |
| 02/07/1989 | US4803414 Method of controlling a step motor |
| 02/07/1989 | US4803389 Stepping motor, method of driving the same and drive circuit therefor |
| 01/24/1989 | US4800334 Method of analyzing the voltage induced in an exciter coil of a stepping motor |
| 01/17/1989 | US4799002 Method of driving a five-phase stepping motor |
| 01/11/1989 | CN2030774U New-type electric driving means for bicycle |
| 01/10/1989 | US4797757 Servo head positioner with pulse adjusting circuitry |
| 12/28/1988 | CN86210255U Micro step driver for full digitized step motor |
| 12/13/1988 | US4791345 Driving device for a stepping motor |
| 12/13/1988 | US4791343 Stepper motor shaft position sensor |
| 12/13/1988 | US4790233 Method and apparatus for controlling hydraulic systems |
| 12/13/1988 | CA1246663A1 Method for detecting step losses in stepping-motor- driven adjusting devices |
| 12/06/1988 | US4789909 Method and apparatus for placing servo information at predetermined locations on a disc |
| 12/06/1988 | US4789816 Stepping motor drive control apparatus |
| 12/06/1988 | US4789001 Operating system for a valve |
| 12/01/1988 | DE3716826A1 Electromagnetic converter |
| 11/29/1988 | US4788484 Method and apparatus for driving a stepper motor with multiple voltages |
| 11/17/1988 | EP0290927A1 Duty factor control method |
| 11/03/1988 | WO1988008641A1 Stepping motor controller |
| 11/01/1988 | US4782406 Data transfer apparatus with a disklike record medium and a method of operation therefore |
| 11/01/1988 | US4782277 Method of driving and controlling a stepping motor |
| 11/01/1988 | US4782276 Electric signal generator system and its application |
| 10/25/1988 | US4779592 Stepping motor and intake control apparatus therewith |
| 10/18/1988 | US4779033 Device for driving stepping motor |
| 10/12/1988 | EP0285868A1 Device for regulating the intake air in a combustion engine |
| 10/04/1988 | US4775825 Positioning method and apparatus therefor |
| 09/21/1988 | CN88100738A Dirving circuit of step motor |
| 09/20/1988 | US4772841 Stepping motor and driving method thereof |
| 09/20/1988 | US4772840 Method and arrangement for controlling a stepping motor |
| 09/20/1988 | US4772815 Variable refluctance position transducer |
| 09/20/1988 | US4772022 Apparatus for stopping the reels of a slot machine |
| 09/06/1988 | US4769585 Method of controlling a line-feed stepping motor in a printer and a driver circuit therefor |
| 09/06/1988 | US4769582 Low vibration pulse drive device for an electric motor |
| 07/26/1988 | US4760320 Stepping-motor driving circuit |
| 07/20/1988 | EP0274623A1 Electric motor driving device for a sewing machine |
| 07/19/1988 | CA1239439A1 Multiple phase stepper motor torque control apparatus and method |
| 07/14/1988 | WO1988005185A1 Multiple stepper motors simultaneously driven by a single stepper motor controller |
| 07/12/1988 | US4757247 Single step stepping motor controller |
| 07/12/1988 | US4757246 Step motor drive circuit |
| 07/12/1988 | US4757245 Control system for a plurality of stepper motors |
| 07/06/1988 | EP0273767A1 Control device for a stepping motor |
| 07/06/1988 | EP0273506A1 Two lead bidirectional stepping motor control |
| 07/06/1988 | EP0273052A1 Device for detecting the rotational position of rotor of motor |
| 07/05/1988 | US4755732 Microangle drive system for stepping motor and microangle drive circuit therefor |
| 07/05/1988 | CA1238964A1 Peristaltic pumps |
| 06/28/1988 | US4754210 Method of and a device for controlling a stepping motor |
| 06/22/1988 | CN87107357A Electric motor drive for sewing machine, especially industrial sewing machine |
| 06/22/1988 | CN85108798B Head positioning control system in magnetic disk device of index servo system |
| 06/21/1988 | US4752867 Control circuitry for electric drives |
| 06/15/1988 | EP0271030A2 Stepping motor and intake control apparatus therewith |
| 06/14/1988 | US4751445 Image sensing apparatus |
| 06/08/1988 | EP0269908A2 Drive circuit for a five-phase stepper motor and triggering method |
| 06/07/1988 | US4749931 Coil current control device |
| 05/24/1988 | US4746998 Method for mapping around defective sectors in a disc drive |
| 05/24/1988 | US4746849 Two lead bidirectional stepping motor control |
| 05/24/1988 | US4746847 Control system for a stepping motor |
| 05/18/1988 | EP0267777A2 Bipolar motor control |
| 05/18/1988 | EP0267527A1 Self-adjusting homing for a stepping motor |
| 05/18/1988 | EP0267417A2 Phase sequencer for stepping motor |
| 05/10/1988 | US4743848 Method of testing a stepping motor |
| 05/10/1988 | US4743824 Method and apparatus for controlling a motor |
| 05/03/1988 | US4742287 Motor driving device for printer |
| 04/27/1988 | EP0265138A2 Position control system for information storage system |
| 04/27/1988 | CN87106108A Electromechanical actuator |
| 04/26/1988 | US4740737 Constant-current control circuit for a stepped motor of single-pole type, particularly for use in motor vehicles |
| 04/19/1988 | US4739346 Drive system and method for ink jet printer |
| 04/19/1988 | US4738209 Work material feeding device for sewing machine |
| 04/12/1988 | US4737700 Method and circuit for driving a stepping motor |
| 04/12/1988 | CA1235173A1 Stepping motor of hybrid multi-phase type and device for its control |
| 04/05/1988 | US4735183 Apparatus for controlling angular displacement of a throttle valve for an automotive vehicle |
| 03/30/1988 | CN87104760A Evergy-saving driving circuit for step motor |
| 03/29/1988 | US4734632 Driving device for a stepping motor |
| 03/29/1988 | US4734631 Step motor control |
| 03/10/1988 | DE3629186A1 Power output stage |
| 03/09/1988 | EP0259089A2 Drive apparatus |
| 03/08/1988 | US4730164 Device for detecting abnormal conditions in a stepping motor |
| 03/02/1988 | EP0257473A2 A method of controlling a step motor |
| 02/24/1988 | EP0256769A1 Electromechanical actuator |
| 02/24/1988 | CN86105807A Driving circuit used for the motor with switch style reluctance |
| 02/24/1988 | CN85204764U Anti-high-tension breakdown driving circuit for power step-by-step motor |
| 02/23/1988 | US4727304 Phase sequencer for stepping motor |
| 02/10/1988 | EP0255736A1 Automatic tool exchange apparatus |
| 02/09/1988 | CA1232656A1 Method and apparatus for normalizing the speed of an element positionable by a servomechanism |
| 01/27/1988 | EP0254085A2 Method of testing a stepping motor |
| 01/20/1988 | EP0253153A1 Method and device for controlling a stepping motor |
| 01/19/1988 | US4720726 Shutter driving apparatus |
| 01/12/1988 | US4719368 Power supply control arrangement for a watch stepping motor |
| 01/07/1988 | EP0252011A1 Stepmotor drive with feedback |
| 01/07/1988 | EP0251776A2 Method of controlling a line-feed stepping motor in a printer and a driver circuit therefor |
| 01/07/1988 | EP0251350A2 Electric motor |
| 01/07/1988 | EP0250862A1 Method and device for controlling a stepper motor |