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 7 - Arrangements for regulating or controlling the speed or torque of electric dc-motors
Patents for H02P 7 - Arrangements for regulating or controlling the speed or torque of electric dc-motors (10,217)
12/1981
12/16/1981EP0041829A2 Motor speed control system
12/15/1981US4306180 Directional control system
12/15/1981US4306179 Electric power control system
12/08/1981US4305026 Device for driving a DC motor with feedback control
12/02/1981EP0040936A1 DC Motor control system and method of DC motor control
12/01/1981US4303874 Motor speed control system
12/01/1981CA1113592A1 D.c. motor speed controller
12/01/1981CA1113590A1 Vehicle power seat adjuster control system
11/1981
11/24/1981US4302711 DC Servomotor circuit having drive current controlled as a function of motor speed
11/10/1981US4300081 Motor voltage feedback for a servo motor control system
11/10/1981US4300079 DC Motor control system
11/10/1981CA1112297A1 Motor control system
11/03/1981CA1111958A1 Digital motor control method and apparatus for measuring-while-drilling
11/03/1981CA1111939A1 Washing machine motor speed control
10/1981
10/28/1981EP0038722A1 Method and apparatus for reducing the loss of power in an electromechanical energy conversion device
10/27/1981US4297623 System for controlling a separately excited constant load DC electric motor
10/27/1981EP0029846A4 Digital velocity servo.
10/21/1981EP0038214A2 Pulse control circuit for permanent magnet D.C. motor
10/13/1981US4295082 Pulse width modulated servo circuit
10/13/1981US4295080 System for controlling rotational direction switchover and for variably controlling rotational speed of motor
10/07/1981EP0037114A2 Circuit arrangement for regulating the number of revolutions of commutator motors
10/06/1981US4293905 Method and apparatus for controlling power and optimizing power factor in an AC-to-DC converter
09/1981
09/30/1981EP0036827A1 Electric traction means with series direct current motor power supplied by a chopper which can be controlled into continuous conductivity
09/30/1981EP0036744A1 Fail-safe system for pulse-controlled three-terminal D.C. motor
09/29/1981US4292578 Combination field chopper and battery charger
09/29/1981US4292574 Personal air sampler with electric motor driven by intermittent full-power pulses under control, between pulses, of motor's back electromotive force
09/23/1981EP0036327A1 Field weakening system for pulse-controlled three-terminal D.C. motor
09/23/1981EP0036326A1 Regenerative braking system for three-terminal D.C. motor
09/23/1981EP0036248A1 Motor voltage feedback for a servo motor control system
09/23/1981EP0036234A1 Automatic sector scan control system for an in both directions rotated main shaft out of a predetermined angular position which is fixed in the course of time
09/22/1981US4291260 Motor velocity control servo amplifier
09/22/1981US4291259 Control apparatus for controlling transistor chopper for use in current supply for electric motor
09/22/1981CA1109551A1 Electric vehicle traction motor control
09/16/1981EP0035608A1 A circuit and system for controlling the operation of a separately excited DC motor and method of operating such system
09/16/1981EP0035491A1 Directional control system.
09/15/1981CA1109122A1 Speed regulator
09/08/1981US4288729 Control system for D.C. electric motor
09/08/1981CA1108784A1 Elevator system
09/08/1981CA1108734A1 Electric vehicle traction motor control
09/08/1981CA1108733A1 Electric vehicle traction motor control
08/1981
08/25/1981US4286222 Timing waveform generator
08/25/1981US4286199 Helical scan recorder having capstan motor speed responsive to a frequency of a command signal
08/18/1981US4284939 Device for detecting opposite phase and open phase
08/18/1981US4284938 Chopper with adaptive energy commutation
08/18/1981US4284937 Load current detecting apparatus of direct current motors
08/18/1981US4284936 Chopper type propulsion system with low speed electrical braking capability for traction vehicles
08/18/1981US4284935 Vehicle power seat adjuster control system
08/18/1981US4284934 Motor control apparatus with an improved thyristor chopper circuit
08/18/1981US4284933 Control circuit for reducing field voltage in D.C. motors
08/18/1981US4284932 System for driving DC motor
08/18/1981US4284930 Motor control apparatus and method
08/11/1981US4283668 DC Motor control with alternate action solenoid drive circuit
08/11/1981US4283667 Motor field exciter
08/11/1981US4283666 Speed control device for a home sewing machine
08/11/1981US4283665 Method and apparatus for eliminating ripple component from motor control loop
08/04/1981US4282466 Transit vehicle motor effort control apparatus and method
07/1981
07/21/1981US4280082 Digital DC motor speed control circuit
07/21/1981US4280081 Motor drive system with inertia compensation
07/21/1981US4279490 Electric driving device
07/09/1981WO1981001831A1 Time controlled elevator door motion
07/07/1981US4277733 Slip recovery system for wound rotor motor
07/01/1981EP0031119A1 Electronic control device for a separately excited direct current machine
06/1981
06/23/1981US4275341 Electronic power supply circuit for a series connected DC motor
06/23/1981US4275340 Control circuit for a final control element, in particular an electric motor
06/23/1981CA1103789A1 Control apparatus for electric car
06/23/1981CA1103754A1 D.c. motor position control
06/16/1981US4274037 Motor speed control system
06/16/1981US4274036 Rotational speed control circuit for a D.C. motor
06/10/1981EP0029846A1 Digital velocity servo.
06/09/1981US4272709 Circuit for controlling the drive of motor
06/09/1981US4272707 Motor control techniques
06/09/1981CA1102902A1 Method and apparatus for providing a stable, high gain servo system
06/09/1981CA1102868A1 Battery fed d.c. motor control system
06/02/1981US4271383 DC Motor control circuit
06/02/1981US4270868 Digital pulse-width modulated printer escapement control system
06/02/1981CA1102408A1 Digital motor speed regulator and control system
05/1981
05/19/1981US4268782 Control system for a DC motor
05/19/1981US4268781 DC Motor drive system
05/13/1981EP0028433A1 Drive means for an apparatus requiring an intermittent drive
05/12/1981US4267500 Control cooling means
05/12/1981US4267492 Control circuit for a D.C. motor
05/05/1981US4266168 D.C. Motor speed control
05/05/1981CA1100575A1 Torsional protective device for power system stabilizer
04/1981
04/28/1981US4264847 Speed control for a four pole motor
04/28/1981US4263988 Speed control system for a motor
04/21/1981US4263537 Controlled positioning of a motor shaft
04/14/1981US4262238 Controlled current supply circuit from a battery to a motor
04/14/1981US4261273 Pneumatic speed control for an electric sewing machine
04/14/1981CA1099331A1 Arrangement for tapping battery bank alternately from opposite ends
04/07/1981US4260938 Control circuits for electrically driven vehicles
04/07/1981US4260937 Speed sensitive field weakening control for traction motors
04/07/1981US4260936 Master-slave power amplifiers
04/07/1981CA1099001A1 Electronic circuit controller for windshield wiper drive motor
04/01/1981EP0026048A1 Method of and means for controlling operation of electric devices
03/1981
03/31/1981US4259623 Series-wound electric motor and control system for governing the speed thereof
03/25/1981EP0025575A1 Dosage device
03/24/1981CA1098193A1 Switching motor control system
03/19/1981WO1981000795A1 Method of and means for controlling electrical devices
03/17/1981US4256998 Electrical control arrangement
03/17/1981US4256983 Voltage-to-frequency converter having a constant frequency mode of operation
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