Patents for H02P 7 - Arrangements for regulating or controlling the speed or torque of electric dc-motors (10,217)
11/1994
11/08/1994US5363024 D.C. fan control circuit device for linearly variable cooling
10/1994
10/26/1994CN1094196A Digitally controlled linear motor with hollow shaft
10/19/1994EP0518911B1 Circuits for the separate potential transmission of pulses of any length or frequency for driving transitor circuits
10/19/1994CN1093840A Motor control arrangement, and shaver comprising such a motorl control arrangement
10/18/1994US5357392 Motor drive device comprising a tacho-generator that can be configured as a back-up motor
10/18/1994US5357219 Pulse width modulator including incrementer/decrementer
10/12/1994EP0619200A1 Stepped compound voltage control circuit of battery in combination with field-control DC motor driving circuit
10/11/1994US5355060 Load impact controller for a speed regulator system
10/11/1994US5355043 Brushless polyphase DC motor
09/1994
09/29/1994WO1994022212A1 Power driven venting of a vehicle
09/29/1994DE4410061A1 Circuit arrangement for a power steering system with motor drive
09/29/1994CA2135069A1 Power driven venting of a vehicle
09/27/1994US5351336 Motor control having improved speed regulation under intermittent loading
09/21/1994EP0616414A1 Controllable compound voltage DC/AC transforming circuit
09/21/1994EP0447422B1 A linkage system for loading machines
09/15/1994WO1994020890A1 Automatic venting system for a vehicle
09/14/1994EP0615081A1 Control of two or more electric motors
09/14/1994CN1092220A System for controlling the speed of dc motor using pulsewidth modulation
09/13/1994US5347214 Method and device for setting the short circuit moment in electric motors, particularly in servomotors
09/13/1994US5347205 Speed and mode control for a blender
08/1994
08/31/1994EP0613237A1 Bidirectional chopper transconductance amplifier
08/31/1994EP0613235A1 Driving method of a reversible electric apparatus
08/30/1994US5343382 Adaptive current control
08/25/1994DE4405515A1 System and method for reversing the polarity of permanent magnet DC motors
08/25/1994DE4405482A1 Semiconductor component
08/25/1994DE4305477A1 Rotation speed control circuit
08/24/1994EP0504153B1 Drive device for movable components
08/23/1994US5341454 DC motor control in electronic sewing machine
08/23/1994US5341286 Current detecting method
08/17/1994EP0611143A2 Apparatus and method for controlling the introduction of chemical foamant into a water stream in fire-fighting
08/10/1994EP0609964A2 Adjustable reactance device and method
08/10/1994EP0609407A1 Fail safe switch.
08/02/1994US5335307 Precision electric motor speed
07/1994
07/27/1994CN1090100A Method for driving of electric motor
07/26/1994US5332954 Optimal DC motor/controller configuration
07/21/1994WO1994016372A1 Low loss recirculation apparatus
07/21/1994DE4301203A1 Controlling revolution speed of washing machine drive
07/19/1994US5331258 Synchronous-rectification type control for direct current motors and method of making
07/13/1994EP0605438A1 Battery-operated device.
07/12/1994US5329214 Motor drive circuit
07/06/1994CN1089067A Numerically-controlled flat-out electrical/power unit
06/1994
06/29/1994EP0604394A1 Control circuit for a DC motor
06/23/1994WO1994014232A1 Converter
06/23/1994WO1994014229A1 Automatic load current back regulation
06/23/1994CA2151271A1 A converter circuit
06/22/1994CN2169948Y Frequency modulation speed governer for ac motor
06/22/1994CN1088165A Voltage compensation of a pulse-width-modulated servomechanism
06/15/1994CN1025065C Operation control circuit for pump motor
06/14/1994US5321344 Control circuit for model railroads
06/09/1994DE4241056A1 Control circuit for wipe-wash operation of windscreen wiper motor for motor vehicle - has push-button for activating washing medium wetting of screen and time limited re-wiping operation of screen wiping motor after end of supply of washing medium
06/08/1994EP0600552A1 Motor control arrangement, and shaver comprising such a motor control arrangement
06/07/1994US5319271 Pulse signal generating device
06/04/1994CA2110304A1 Motor control arrangement, and shaver comprising such a motor control arrangement
06/01/1994EP0599608A2 Method and apparatus for driving motor
06/01/1994EP0598893A1 Solid-state sensing and control transit car door system
05/1994
05/31/1994US5317669 Direct current motor speed control apparatus
05/24/1994US5315219 Driving circuit for direct-current (DC) motor
05/24/1994US5315218 Motor controls
05/24/1994US5315194 Actuator device for an electric window winder
05/18/1994CN2165569Y Brushless dc motor controlled by electronic brain
05/18/1994CN1086939A Method for rotor magnetic potential holographic control and motor
05/18/1994CN1024616C Procedure for selection of bridge or bridge section in rectifier bridge unit and bridge selector unit
05/17/1994US5313548 Direct current motor speed controller
05/11/1994EP0596472A2 Circuit arrangement for feeding an inductive load
05/11/1994EP0596170A1 Simultaneously operative multi-unit AC or DC series excitation motors or compound motors interlock driving circuit device
05/10/1994US5311615 Method of changing speeds in a multi-polar electric motor of the constant flux type, and a motorized fan unit with change of speed controlled by such a method
05/04/1994CN2164149Y Fireproof AC conversion speed-regulating device
05/04/1994CN1086330A A dual motor speed controller
05/04/1994CN1024441C Method and apparatus for optimization of thyristor power supply transport time delay
05/03/1994US5309077 Apparatus and method for loading a cassette tape in a video equipment
04/1994
04/26/1994US5306990 Electric motor control apparatus including an output stage protected against malfunction and damage
04/07/1994DE4333813A1 Pulse width modulator for control of DC motor - has incrementer-decrementer incrementing or decreasing data value held in timer in accordance with result of data comparison
03/1994
03/30/1994CN1084681A Stepless speed-regulating AC motor
03/29/1994US5298812 Regulating circuit as for controlling the speed of a motor
03/22/1994US5296792 Bidirectional chopper transconductance amplifier
03/10/1994DE4229440A1 Inductive load switching circuitry - uses two switches in series and in parallel with load supplied with inverse control signals
03/09/1994EP0585581A2 Carriage motor controller for printer
03/09/1994CN1083636A Method for the control of a motor
03/08/1994US5293518 Multiple two-node windings electrical motors controllers
03/08/1994US5293104 Drive device for movable structural component units
03/08/1994US5293103 Quiet fan speed control with linear adjustment actuator
03/03/1994WO1994005031A1 Fail safe switch
03/02/1994EP0585140A2 Motor drive circuit
03/02/1994EP0462169B1 An actuator device for an electric window winder
03/01/1994US5291107 Circuit for driving reel motor of videotape recorder
03/01/1994CA2104980A1 Motor drive circuit
02/1994
02/24/1994DE4227761A1 Regulating and/or limiting control current for electric motor, e.g. of video recorder - using pulse modulated signals with signal current value as measure of actual current supplied to electric motor and determined by given equation
02/23/1994EP0583724A2 Method and circuit for controlling a motor
02/22/1994US5289560 DC motor control using frequency and pulsewidth modulation
02/22/1994US5289092 Apparatus and method for d.c. motor control
02/17/1994WO1994003969A1 Drive circuit for a resonant reciprocating motor
02/17/1994WO1994003968A1 Power window driving controller
02/17/1994CA2141311A1 Apparatus for driving and controlling power window
02/16/1994CN2156619Y Electric rolling gear for water electric machine group
02/15/1994US5287046 Method and system for actuator control for direct access storage devices
02/15/1994CA1327055C Compartment panel control apparatus for a motor vehicle
02/09/1994EP0582467A2 The improvement of the shunt type series excitation field driving circuit
02/09/1994EP0582417A1 Method and circuit device for DC series or compound excitation type machine
02/09/1994EP0582415A1 Voltage compensation of a pulse-width-modulated servomechanism
02/08/1994US5285144 Generation of multi-phase multiple-order harmonics of a fundamental frequency source with adjustable phase angle capability
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