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Patent Searching and Data


Matches 751 - 800 out of 22,708

Document Document Title
WO/2001/022095A1
The invention relates to a method for regulating the rotational speed of a motor, to which a digital governor is assigned and which during operation generates an actual value signal for the rotational speed in the form of a rotational sp...  
WO/2001/022569A1
A motor control circuit for a direct current electric motor has a pair of direct current inputs supplied respectively from negative and positive current sources. The direction of travel of the rotor of the motor (10) is determined by the...  
WO/2001/018340A1
The invention relates to a method for regulating an actual speed of the working stroke of a motor-vehicle window-pane, during its displacement from a closed position into an open position and vice versa and to a device which is suitable ...  
WO/2001/013510A1
The invention relates to a device (10) for personal use such as tooth brushes, mouth rinsers, shavers and kitchen equipment which are powered by an electric motor (12) with a control/regulator stage (14) for supplying electricity (16) to...  
WO/2001/010011A1
A permanent magnet DC variable length driven electric motor (not shown) is typically used to actuate the mechanism of a vehicle rear view mirror (not shown). When the rotating portion of such a motor is rotating as a result of the applic...  
WO/2001/001556A1
The method for controlling a motor driving a load holds the speed of the output shaft to the motor substantially constant as the torque imposed upon the shaft by the load varies, then regulates the rate of change of the output torque del...  
WO/2000/079676A1
A safety circuit system for a DC driven device for use with a fluid delivery system includes a first voltage potential DC power line, a second voltage potential DC power line, a controller and a safety circuit. The first voltage potentia...  
WO/2000/079683A1
The invention relates to a device for operating an electrical load (16) which is located on the diagonal (17) of a bridge circuit (10). A control circuit (18) powers respective transistors (T1, T4; T2, T3) which lie diagonally opposite e...  
WO/2000/074222A1
An H-type bridge circuit for the drive of a position control actuator, which is capable of controlling minute current. The H-type bridge circuit includes a load connected between the outputs of first and second output circuits that produ...  
WO/2000/070738A2
The invention relates to a method for controlling at least one inductive consumer by means of a pulse width modulated control signal using a PWM control unit, wherein the control pulses of the PWM control signals connect and disconnect t...  
WO/2000/067254A1
The invention relates to a motion control system for driving a motor-driven device precisely to a predetermined position in a short time. More particularly, this invention relates to a CD-carousel loader having a precise and short access...  
WO/2000/064040A1
Disclosed is an electronic pulse width modulation (PWM) regulator of a low frequency rectangular wave signal serving to control the speed of a direct current motor. The invention aims at simplifying the design of said regulator by elimin...  
WO2000021188A3
The invention relates to a device for controlling engine speed, comprising a speed sensor that enables a voltage pulse signal with a pulse sequence dependent on engine speed to be obtained directly from a sensor signal or by means of int...  
WO/2000/060422A1
A door operator (10) for an upward acting sectional or one piece, California-type, garage door includes a DC variable speed motor (34) directly connected to a drive mechanism for moving the door (21a) between open and closed positions. A...  
WO/2000/059114A1
A pulse width modulation scheme allows the creation of a unipolar pulse width modulated output signal. Two switching circuits (104, 204), preferably different legs of an inverter circuit, can operate to not only modulate an input voltage...  
WO/2000/059102A1
The invention relates to a circuit for the pulse width-modulated control of an electrical consumer, comprising a circuit part with a switching element for connecting and disconnecting the consumer to or from the source of the operating v...  
WO2000029902A3
A method for removing spurious signals in a process of motor current signature analysis of an electric motor includes creating an electronic model of the motor, acquiring simultaneous measurements of voltage and current at the motor, app...  
WO/2000/038311A1
A motor control chip (62) for asserting the control signals used to regulate the energization of the windings of a DC motor. The motor control chip includes a tachometer (94) that receives pulsed signals that vary with the rotation of th...  
WO/2000/035689A2
The invention relates to a method for operating an actuating drive of a motor vehicle with different vehicle electric system voltages, whereby the actuating drive is connected to the vehicle electric system in order to operate an actuati...  
WO/2000/029902A2
A method for removing spurious signals in a process of motor current signature analysis of an electric motor includes creating an electronic model of the motor, acquiring simultaneous measurements of voltage and current at the motor, app...  
WO/2000/026862A1
A sheet transport system comprises a plurality of separately driven transport sections (1, 2; 4, 5, 6), each transport section being driven by a respective motor or motors (7-12). A control system (22-27, 50) controls operation of the mo...  
WO/2000/021188A2
The invention relates to a device for controlling engine speed, comprising a speed sensor that enables a voltage pulse signal with a pulse sequence dependent on engine speed to be obtained directly from a sensor signal or by means of int...  
WO/2000/019213A1
In a device for determining the position of a battery operated control motor (2) with commutator, a pulse voltage is deflected from the current outages caused by the commutator in the supply line (3) of the control motor (2), which pulse...  
WO/2000/019595A1
A current compensation system for an electrical brush motor senses the amount of current by the electrical motor and generates a signal quantifying the amount of current drawn by the motor so that the amount of current drawn can be re-su...  
WO/2000/014843A1
The invention relates to a method for moving a movable vehicle part between at least two positions, wherein the vehicle part is driven by an electric motor (10), a pulse signal corresponding to the rotational movement of the electric mot...  
WO/2000/014846A1
The invention relates to a method for moving a vehicle part between at least two positions and to a drive device for implementing said method. The vehicle part is driven by an electric motor (10). A pulse signal corresponding to the rota...  
WO/2000/013554A1
The invention relates to a displacement device for displacing furniture, comprising -he following: a) a drive device (5) having at least one direct current positioning motor (3) to which a voltage source (33) connected to the mains is as...  
WO/2000/014845A1
The invention relates to a method for moving a vehicle part between at least two positions and to a drive device for implementing said method. The vehicle part is driven by an electric motor (10), a pulse signal corresponding to the rota...  
WO/2000/013283A1
A motor control circuit controls operation of a motor for making or breaking one or more pairs of contacts of a power switching device such as a circuit breaker. The motor control circuit includes a logic circuit responsive to a control ...  
WO/2000/010244A1
In order to regulate the rotational speed of a fan (L) without exerting any influence resulting from oscillation and interference effects, a circuit evaluating a commutating impulse on the supply lines of the fan (L) is provided. Said ci...  
WO1999054991A8
A hybrid DC motor controller is provided for driving a DC motor. A switch is connected in series with the DC motor, and a capacitor is coupled in parallel with the DC motor and the switch. The speed of the DC motor is controlled by the c...  
WO/1999/066633A1
A device with an electromotor (10) has a microcontroller (12) for influencing at least one motor function and a non-volatile storage element (14) for storing at least one variable as a specification for this motor function. The device al...  
WO/1999/062675A1
The invention relates to a method for driving an electric screwing device during which a control device supplies electric current in the form of pulse signals to an electric motor. In addition, the motor generates a torque which turns a ...  
WO/1999/062169A1
In order to avoid the occurrence of oscillations during regulation of electronically switched electric motors (M), e.g. of a ventilator whose supply voltage (Vb) is regulated depending on the momentary number of revolutions and the set n...  
WO/1999/061920A1
The invention relates to a circuit for detecting the speed of electronically controlled electric motors (M), comprising means for detecting the current rates of rise (TPV, C, OP, D, R1, R2b, R2a, T2, R3b, R3a, T3, à, Rnb, Rna, Tn) and m...  
WO1999049487A3
The invention relates to a drive unit for switching circuit breakers, especially disconnecting and/or grounding switches of medium-voltage switchgear, on and off. Said unit comprises a reversible d.c. motor and a switching device which c...  
WO/1999/055566A1
The invention relates to a method and device which serves to control a pump of a brake system according to demand. To this end, a total control is firstly (t0) carried out for the time TAnstMax (t1-t0) of the pump motor after the pump ha...  
WO/1999/054991A1
A hybrid DC motor controller is provided for driving a DC motor. A switch is connected in series with the DC motor, and a capacitor is coupled in parallel with the DC motor and the switch. The speed of the DC motor is controlled by the c...  
WO/1999/054992A1
An excitation circuit (3) is disclosed for balancing the phase voltages in a two phase motor. The excitation circuit (3) includes a first switch (S1) and second switch (S2) and a port (15) for receiving a signal to drive the switches. Th...  
WO/1999/049487A2
The invention relates to a drive unit for switching circuit breakers, especially disconnecting and/or grounding switches of medium-voltage switchgear, on and off. Said unit comprises a reversible d.c. motor and a switching device which c...  
WO/1999/043078A1
The present invention relates to a method and a device for measuring the rotation speed of electronically switched fans (L), wherein said method comprises measuring the maximal rates of current increase in the current fluctuations genera...  
WO1999027640A3
Electrical direct current actuators are frequently used in electronic control and regulation devices. Said actuators have a distinct low-pass behavior with respect to the actuating signal. Typical examples for such actuators are electric...  
WO/1999/035734A1
A motor actuator (10) for preventing a motor (m) from drawing excess current for longer than a predetermined time delay period including dynamic brakes for simultaneously braking motor rotation when motor (m) operation is terminated for ...  
WO1998058825A3
A window wiper motor system (14) for an automotive vehicle includes an incremental wiper position detection device. A window wiper feedback pattern (231) is disposed on a stationary circuit board (207) mounted within a gear enclosure wit...  
WO/1999/029033A1
A timing generating circuit (4A) generates and outputs two signals which do not temporally overlap with each other. One of the signals is a PWM signal for driving a first MOSFET (10) serving as a switching element; the other is a pulse s...  
WO/1999/029032A1
Method for eliminating torque vibrations in a frequency converter controlled a.c. motor used in an elevator system. In the method, the torque vibrations are minimised on the basis of the characteristic frequency of the motor supply curre...  
WO/1999/027640A2
Electrical direct current actuators are frequently used in electronic control and regulation devices. Said actuators have a distinct low-pass behavior with respect to the actuating signal. Typical examples for such actuators are electric...  
WO/1999/027642A1
The invention relates to a control system for a commutator motor control which is operated by phase-fired control. Allocation of a first and second control device in a single operating state without transition makes it possible to obtain...  
WO/1999/019966A1
A multi-functional apparatus (41) employs an intermittent motion mechanism (103; 105; 107). An electromagnetic device selectively causes movement of the intermittent motion mechanism (103; 105; 107) thereby moving a mechanical device (45...  
WO/1999/017436A1
A motor control system is provided comprising an electrically charged battery, an electrical motor, a battery voltage sensor, a motor speed sensor, an armature voltage sensor, an armature current sensor, and a microprocessor. The magnitu...  

Matches 751 - 800 out of 22,708