Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02P - Control or regulation of electric motors, generators, or dynamo-electric converters; Controlling transformers or reactors or choke coils › H02P 29 - Arrangements for regulating or controlling electric motors, appropriate for both ac- and dc-motors
Patents for H02P 29 - Arrangements for regulating or controlling electric motors, appropriate for both ac- and dc-motors (5,779)
10/1990
10/23/1990US4965497 Control circuit for an electric drive motor
10/17/1990EP0392367A2 Load state decision apparatus of servomotor
10/16/1990US4963806 Servo positioning apparatus
09/1990
09/26/1990CN1045566A Method for controlling speed of elevator
09/25/1990US4959733 Motor rotation control apparatus with motor rotational frequency memory
09/20/1990WO1990010494A1 Chlorine-resistant semipermeable membranes
09/18/1990CA1274295A1 Adaptive blower motor controller
09/18/1990CA1274275A1 Setting and dialogue device, particularyl for a speed changer
09/12/1990EP0262120B1 Control circuit for an electric motor
09/11/1990US4956593 Servo motor controlling method
08/1990
08/21/1990US4950968 DC motor driving apparatus with function for compensating for drive voltage change
08/21/1990US4950967 Servomotor control apparatus
08/21/1990US4950090 Method for the detection and regulation of a spring moment and a difference speed in rotationally driven two-mass systems
08/21/1990CA1273056A1 Turbine helper drive apparatus
07/1990
07/26/1990WO1990008353A1 Anomaly detecting method in a servo system
07/25/1990EP0379227A2 Method of obtaining optimum load value for a user of an exercise device
07/04/1990EP0375786A1 Motor controller
07/03/1990US4939440 Friction-compensating mass motion controller
06/1990
06/27/1990EP0374255A1 Method of controlling servo motor
06/27/1990EP0230470B1 System for switching and controlling unit amount of torque limit value of servo motor for injection molding machine
06/19/1990US4935643 Device for the limitation of torque in a hair treatment device
06/14/1990WO1990006622A1 Method of controlling the speed of a servomotor
05/1990
05/15/1990US4926077 Resistance compensation in a motor using a thermally variable resistive network
05/08/1990US4922869 Torque controlling apparatus for internal combustion engine
05/03/1990WO1990004882A1 Servo control apparatus
04/1990
04/18/1990CN1007689B Printer-driving motor and its control device
04/17/1990US4918443 Method for determining a rotational angle of a rotary body
04/10/1990US4916375 Servomotor control apparatus
04/04/1990EP0361222A2 An automatic servo gain calibration system for a disk drive
04/04/1990CN1007415B Method for restricting rotating speed of drived motor of offset printer
04/03/1990US4914365 Control device for servo motor
03/1990
03/14/1990EP0358590A1 Actuator two-fault tolerance apparatus
03/14/1990EP0358149A2 Load drive circuits
03/14/1990EP0357778A1 Method of speed control for servomotor
02/1990
02/28/1990EP0355442A2 Method and device for reducing the couple of a system driven by an electric motor
02/27/1990US4904915 Velocity control apparatus
02/21/1990CN1006947B Arrangement for controlling motor speed
02/20/1990USRE33167 Circuit arrangement for monitoring speed of a drive motor
02/20/1990US4903283 Phase determining circuit to generate a phase control signal, and method for generating said signal
02/20/1990US4903191 Centrifuge control system having dual processors
02/20/1990US4902946 Software servo for a rotary head drum of VTR
02/14/1990EP0354790A2 Method and apparatus for controlling power generation in internal combustion engines
02/08/1990WO1990001231A1 Resistance compensation in a motor using a thermally variable resistive network
01/1990
01/30/1990CA1265186A1 Apparatus for compensating a quantization error
01/17/1990EP0350511A1 System for protection servo amplifier
01/10/1990EP0349923A2 A control means for a universal electric motor
12/1989
12/27/1989EP0347465A1 Method controlling servomotor
12/26/1989US4890172 Automatic servo gain calibration system for a disk drive
12/26/1989US4890046 Numerical control apparatus
12/14/1989WO1989012349A1 Motor controller
12/13/1989EP0345556A1 Counter circuitry for motor rotation speed control circuitry
12/05/1989US4885515 Velocity control apparatus
11/1989
11/30/1989DE3818212A1 Electric drive system for a chain-driven winning plough for use in underground winning operations
11/21/1989CA1263166A1 Conveyer brake control
11/15/1989EP0341445A1 Method of and apparatus for measuring revolution speed
11/07/1989US4879503 Blower motor control for an air conditioner
11/07/1989US4879501 Constant speed hydrostatic drive system
11/07/1989US4879497 Method and device for measuring the temperature of a brushless d-c motor
11/07/1989CA1262763A1 Method and apparatus for the synchronization of a moveable material web and an optical deflection path
11/02/1989WO1989010590A1 Method of controlling servo motor
11/02/1989EP0339096A1 Motor driving method in industrial robot
10/1989
10/26/1989DE3812771A1 Drehzahlvorgabe fuer elektrohandwerkzeug Speed ​​control for electromechanical hand tools
10/25/1989EP0338485A2 Torque controlling apparatus for internal combustion engine
10/25/1989EP0252948A4 Motor system.
10/24/1989US4875541 Electric power steering system
10/03/1989US4872123 Commutation compensation device for a DC machine
09/1989
09/26/1989CA1260115A1 Process for limiting the rotational speed of a drive motor of a rotary offset printing press
09/26/1989CA1259885A1 Power drive unit and control system therefor
09/13/1989EP0332568A1 Operating method and control circuit to monitor the start of electric high-voltage motors using asynchronous starting
09/13/1989EP0332200A2 Servo positioning apparatus
09/05/1989US4864200 Motor speed control apparatus
08/1989
08/30/1989EP0329796A1 Servo motor controller
08/30/1989CN1035179A Core monitor that uses rotor shaft voltage
08/29/1989US4862045 Method and apparatus for controlling the number of revolutions of a rotor
08/22/1989US4859918 Method and apparatus for producing a speed control voltage for direct current motors in typewriters or similar office machines
08/15/1989US4857814 Electronic motor controls, laundry machines including such controls and/or methods of operating such controls
08/08/1989US4855661 Motion control apparatus for induction motor
08/08/1989US4854183 Cyclic electromechanical program control for controlling elements, such as for example openable roofs of vehicles
08/02/1989EP0326255A2 Motor control apparatus
07/1989
07/27/1989WO1989006892A1 System for controlling servo motor
07/25/1989US4851171 Method and apparatus for controlling back pressure in injection molding machine
07/19/1989EP0324388A2 Speed control method and circuit of a rotor
07/13/1989WO1989006455A1 Servomotor controller having internal data display function
07/13/1989WO1989006452A1 System for protection servo amplifier
07/11/1989US4847541 Door actuating system
06/1989
06/29/1989WO1989006066A1 Method of speed control for servomotor
06/28/1989EP0321920A2 Centrifuge control system having dual processors
06/14/1989CN1004531B Control circuit for electric printing machine drive motor or similar device
06/06/1989US4837490 Control method for an injection motor of an injection molding machine
06/01/1989WO1989005060A1 Method of protecting a motor from overload
05/1989
05/31/1989EP0211011B1 Circuit for regulating the rotational speed of a series motor
05/18/1989WO1989004514A1 Motor driving method in industrial robot
05/16/1989US4831317 Method for controlling a servomotor
05/16/1989US4830885 Chlorine-resistant semipermeable membranes
05/10/1989EP0314800A1 Device for controlling speed of servo motor
05/03/1989EP0313928A1 Detection and control method for a moment of torsion and the speed difference of a rotational two-mass system
05/03/1989EP0313798A2 Device for limitimg the turning moment of an apparatus for hairdressing
04/1989
04/20/1989WO1989003611A1 Method controlling servomotor
04/18/1989US4823059 Control apparatus for a compartment panel pull down mechanism
04/12/1989EP0311127A2 Control device for servo motor
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