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)
06/1989
06/28/1989EP0321543A1 Load control system
06/22/1989DE3838367A1 Electric motor for operation in an apparatus which can resonate
06/21/1989EP0320737A2 Slow start power supply
06/20/1989US4841207 Pulse width modulated control method and means
06/20/1989US4841205 Control device for a movable part, designed for opening and closing an opening, especially a sliding/tilting roof for a vehicle
06/14/1989CN1004531B Control circuit for electric printing machine drive motor or similar device
06/13/1989US4839570 Current limiting control circuit for d.c. motors
06/07/1989EP0318530A1 An apparatus for interactively accelerating an electric drive vehicle.
06/06/1989US4837486 DC motor speed stabilizing method and apparatus
06/06/1989CA1255378A1 Pulse width modulation dc motor speed control
05/1989
05/24/1989EP0317538A1 Hose clamp
05/24/1989EP0316324A1 Speed control unit for direct current electric motor with intrinsic feed-back.
05/24/1989DE3738341A1 Stromversorgungsschaltung fuer einen motor A power supply circuit for an engine
05/23/1989US4833379 Motor control fail-safe circuit
05/23/1989US4833376 Motor drive circuit
05/23/1989US4833375 Digital motor control system
05/17/1989CN2037697U Speed adjuster for two-seater electric tricycle
05/16/1989US4831344 IC output circuit for use in pulse width modulator
05/16/1989US4831312 Speed control device for d-c motors
05/10/1989EP0315597A2 Analog multiplex for sensing the magnitude and sense of the current through a H-bridge stage utilizing a single sensing resistance
05/10/1989EP0314681A1 Final stage of a bridge circuit.
05/09/1989US4829230 Motor control circuit for accurate speed control with capacitor leakage compensation
05/09/1989US4829218 Direct current adjusting device
05/03/1989EP0313637A1 Direct current motor speed control.
05/03/1989CN2037121U Power saving device for three-phase asynchronous motor
04/1989
04/26/1989CN2036727U Thyristor type speed-regulating controller for industrial vehicles
04/18/1989US4823056 Pulse-width modulation drive circuit
04/18/1989US4823055 Electronic control circuit for command systems
04/12/1989EP0311355A2 Electric motor controllers
04/05/1989EP0310116A2 Motor driving power supply apparatus including switching regulator control loop
04/05/1989EP0168502B1 Reel tension controlling method and apparatus
04/04/1989US4818926 Tachometric device driven by an electric motor
03/1989
03/29/1989CN2035157U Silicon controlled trigger controller for cascade speed controlling and smooth starting
03/28/1989US4816726 Method of and arrangement for controlling and h-bridge electric motor
03/23/1989WO1989002672A1 Apparatus for utilizing an a.c. power supply to bidirectionally drive a d.c. motor
03/22/1989EP0308358A2 Method of and arrangement for controlling an H-bridge electric motor
03/21/1989US4814678 Speed control apparatus for motor
03/16/1989DE3824419A1 Electronic drive device for DC motors with constant excitation field
03/15/1989EP0306950A2 Device for actuating movable parts for closing vehicle openings
03/15/1989EP0306795A1 Electromotive driving device for the operation of windows, sliding roofs or the like, especially for motor vehicles
03/15/1989CN2034350U Energy-saving device for ac motor speed regulating
03/15/1989CN2034349U Stepless speed regulating device
03/15/1989CN2034348U Dc motor speed regulator with duty ratio 0%-100%
03/07/1989US4810955 Measuring apparatus for determining the countervoltage of electric motors
03/02/1989DE3728006A1 Blower drive for the regenerating device of a soot filter
03/02/1989DE3726423A1 Circuit for a direct current series-characteristic motor
03/01/1989CN2033559U Telecontrolled excitation regulator
02/1989
02/16/1989DE3726123A1 Circuit for operating a DC load
02/15/1989CN1031040A Speed-changing device for electrical shaver
02/14/1989US4804895 Charge balancing current sampler for a digital motor control
02/08/1989EP0302477A2 Voltage control for battery powered motor or the like
02/07/1989US4803410 Variable duty ratio speed controller for DC motors
02/07/1989US4803409 Acceleration signal corrected motor speed control system
01/1989
01/31/1989US4801854 Adjustment and dialogue device more particularly for speed variators
01/24/1989US4800324 Brush motor amplifier with overspeed protection
01/12/1989WO1989000360A1 Programmable switching transistor circuit
01/05/1989DE3719987A1 Getriebe fuer kleinantriebe Gear for small drives
01/03/1989US4795314 Condition responsive pump control utilizing integrated, commanded, and sensed flowrate signals
12/1988
12/29/1988WO1988010532A1 Load control system
12/29/1988WO1988010379A1 Gearbox for small gears
12/28/1988EP0296444A1 Speed control circuit for a DC miniature motor
12/20/1988US4792735 Apparatus for adjusting torque and speed of a dentist handpiece D.C. motor
12/20/1988US4792734 Stepless speed change electric chain block
12/08/1988DE3709005C1 Circuit arrangement for D.C. chopper convertor-operated D.C. series-wound motors
12/06/1988US4789791 Rotary drive mechanism
12/06/1988CA1246193A1 Electro-mechanial shower oscillator for papermaking machine
12/01/1988WO1988009583A1 An apparatus for interactively accelerating an electric drive vehicle
12/01/1988DE3810589A1 Single-knob (button) operation electronics controller
12/01/1988DE3717481A1 Circuit arrangement for driving a DC machine with a plurality of DC controllers
12/01/1988DE3716814A1 Device for temperature compensation of semiconductor switches for rotation-speed stabilisation
11/1988
11/29/1988US4788480 Voltage control for battery powered motor or the like
11/29/1988US4788479 Control mechanism for a separately excited DC drive motor and method for control of a DC drive motor
11/29/1988US4788478 Speed control system for DC motor
11/23/1988EP0291813A2 MOS-transistor bridge circuit
11/23/1988EP0291803A2 Drive pulse circuitry for semiconductor switches
11/22/1988US4786822 Load control system
11/17/1988WO1988009086A1 Direct current motor speed control
11/09/1988EP0148260B1 Controlled electric current supply unit
11/08/1988US4783693 Driver element for inductive loads
11/08/1988US4783616 Device for slowing down the rotational speed of the sheet transfer and printing cylinder for single-sheet silk screen printing machines
11/03/1988DE3708479A1 Binary armature current monitor for DC drives
10/1988
10/25/1988US4779431 Drive system for automatic washer
10/19/1988EP0287147A2 Monolithic integrated power circuit in semibridge configuration, particularly for piloting electric motors
09/1988
09/28/1988EP0283945A2 Power supply device for electric tools
09/27/1988US4774444 Speed control circuit for an electric motor
09/27/1988US4774443 Driving mechanism for a switch
09/27/1988US4774441 Motor control system
09/20/1988US4772829 Apparatus for interactively accelerating an electric drive vehicle
09/15/1988DE3645016A1 Method and circuit arrangement for limiting the rotation speed of an electric motor, especially in the case of a model railway
09/06/1988US4769582 Low vibration pulse drive device for an electric motor
08/1988
08/30/1988US4768142 Power-supply circuit
08/24/1988EP0279427A2 Commutation compensation device for a dc machine
08/17/1988EP0278536A1 Control device for a movable part, designed for opening and closing an opening, especially a sliding/tilting roof for a vehicle
08/09/1988US4763219 Overload protection for DC motor-driven linear actuator
08/04/1988DE3702380A1 Circuit arrangement for direct current actuator-operated direct current shunt motors
08/02/1988US4761593 Device for controlling motor driven antennas for vehicles
07/1988
07/28/1988DE3806086A1 Single-button operation electronics controller
07/27/1988CN87208743U Pulse modulation type governor for electric bicycle
07/13/1988EP0274036A1 Motor control
07/13/1988EP0273978A1 Regeneration control system for a servo motor
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