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Matches 851 - 900 out of 22,564

Document Document Title
WO1990008996A3  
WO/1991/014327A1
A circuit is disclosed for the separate potential transmission of pulses of any length and frequency for driving transistor circuits. The circuit has an additional demodulator unit (ZUMO) on the lower voltage side (KSS) and a magnetic, h...  
WO/1991/011052A1
A motor controller (10) for a single or multiphase induction motor (51) with control loop (59a, 59b, 59c) including auxiliary winding (61), capacitor (63) and saturable reactor (65). Auxiliary winding (61) is electro-magnetically coupled...  
WO/1991/009198A1
A drive device for movable components, e.g. window winders in motor vehicles, has a reversible electric motor (10) and a control device (16) for switching the motor (10) on in a predetermined direction of rotation of its rotor spindle (1...  
WO/1991/009461A1
A solid state DC power control circuit to efficiently use DC battery power without the normally associated energy waste which includes an input control signal filtering, amplifying, and conditioning circuit (133), a triangular waveform g...  
WO/1991/005402A1
A power controller (30) comprising a plurality of MOSFET transistor switches (Q5, Q6, Q13, Q14) adapted to control the current flow through a load such as a DC motor (M), gated charge pump circuits (32a, b) are provided to control the co...  
WO/1991/004607A1
A control system for a d.c. commutated motor (10) is arranged to move a driven element (11) along a predetermined path. The control system includes means (16) for deriving a control signal by producing an electrical signal proportional t...  
WO/1991/003870A1
A power supply control apparatus of an inductance load which makes power supply control such that a power supply current having a specified waveform is supplied to an armature coil during the high-speed revolution of a motor. Since a lar...  
WO/1990/013172A1
Disclosed is a control circuit in which a pulse width-modulated signal (3) actuates a changeover switch (4) whose output is switched between two d.c. voltages of different sizes (+U, -U) and gives, via a low-pass filter (5), an analog co...  
WO/1990/012446A1
A controller for an electric motor comprises a voltage controlled oscillator circuit (10) the output of which is transformed into a triangular waveform by a waveform generator (12). The output of the generator is applied to one input of ...  
WO/1990/010974A1
An actuator device for an electric window winder (101) comprising an electric motor (104) driving a recirculating ball worm screw unit for movement of a pre-compressed screw (112) for displacing the window, and comprising a specific elec...  
WO/1990/008996A2
In a preferred embodiment, a high-frequency, pulse-width-modulated, power-transistor, DC motor speed controller having current limiting in both drive and regenerative modes, essentially constant ramping rates regardless of whether or not...  
WO/1990/008423A1
A motor (30) and manual actuated switch (26) includes a motor control circuit (10) for controlling the motor to rotate in either a clockwise or counterclockwise direction to actuate a mechanical switch between the open circuit and short ...  
WO/1990/006403A1
A linkage system for loading machines is mounted on two lift-arms (14) supporting a pallet-lifting fork or a bucket (22) at the ends of the lift-arms. The linkage system is so designed that when using a bucket (22) or pallet-lifting fork...  
WO/1990/002063A1
A drive, in particular for windscreen wiper systems in motor vehicles, has a d.c. motor (10) which can rotate at at least two different speeds and which has a collector (11), a first and a second brush (12, 13) which rest essentially dia...  
WO/1989/011816A1
A battery-operated surface treatment apparatus having a booster function, preferably a vacuum cleaner, comprises an electric motor (10) which drives a treatment unit, such as a suction fan. Further, the apparatus comprises a battery-powe...  
WO/1989/010030A1
There is disclosed an actuator device adapted to be in the form of a transponder for influence by a magnetic powering field, the device having an inductive means to receive a magnetic field to provide a signal to be rectified for supplyi...  
WO/1989/009511A1
A digital motor control system includes a flip-flop and latch (20, 24) for receiving motor circuit drive data from a microprocessor, a counter (34, 36) for counting to a predetermined value representing the total duration of a motor driv...  
WO/1989/008349A1
Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus capable of high speed, high current switching over a duty factor range of 0 % to 100 % includes a single-wire connector (104) to a source (101) of swi...  
WO/1989/002672A1
Apparatus for using an a.c. power supply to bidirectionally drive a d.c. motor includes a first silicon controlled rectifier (SCR) having a cathode connected to a terminal of the motor and an anode connected to a circuit common junction....  
WO/1989/000360A1
A programmable switching transistor circuit has at least one pair of semi-conductor devices (12, 14) of opposite types, e.g., pnp and npn types, interconnected with the gate terminal of the first device (12) connected to the anode termin...  
WO/1988/010532A1
A load control system (10) generates a periodic failsafe signal (CO) and two load control signals. The failsafe signal (CO) is used to drive a charge (20) pump which acts as a voltage multiplier to generate an enable signal. A DC bridge ...  
WO/1988/010379A1
A gearbox for small gears comprises a switch for reversing the direction of rotation of an engine. The shaft of the engine imparts a rotary motion to a gear drive shaft which, in one direction of rotation, imparts a rotary motion in the ...  
WO/1988/009583A1
Apparatus (10) for controlling the supply of power to an electric drive motor (12) normally controls the duty cycle of a power switching element (88) to produce a variety of vehicle speeds. The apparatus typically controls the rate of ch...  
WO/1988/009086A1
The motor speed control circuit senses average back EMF as a measure of motor speed. The back EMF charges a capacitor (Cf) circuit which accumulates charge and develops a voltage indicative of the motor speed. A sample and hold circuit (...  
WO/1988/000771A1
It is foreseen to measure the rotational speed (v) of a motor by measuring the electromotive force (e.m.f.), calculated at any moment as the difference between the feeding voltage and the voltage drop across the armature resistance (Ri),...  
WO/1988/000770A1
A device for controlling and regulating the current flowing through an electromagnetic consumer has a bridge circuit, the consumer being located on one of the diagonals thereof. Four current control elements of the type logic-level power...  
WO/1987/007567A1
Switch (10; 20) for actuating an electric motor of a windscreen wiper from a voltage source, which has a switching element that can be set to several continuous-operation modes (D1, D2) as well as to an intermittent-operation mode (I). T...  
WO/1987/007451A1
Motor control circuits having fault protection devices are in commercial use today. Such devices typically include logic elements requiring a conditioned power supply, and are incapable of operation directly from the main motor power sup...  
WO/1987/006693A1
A solid state power amplifier for driving a shaker. The amplifier is comprised of a circuit which generates a pulse-width modulated drive signal for driving an armature of a shaker. The circuit includes an oscillator (91) (92) (93), powe...  
WO1987002527A3  
WO/1987/003753A1
In a D.C. motor control system, a D.C. motor drives a cooling fan for data processing equipment, the speed of the fan motor being controlled in accordance with the temperature sensed by a temperature sensor (50). A D.C. power supply (10)...  
WO/1987/002840A1
Circuit for suppressing interference from electricity users, the mean electrical power of which can be modified by phase control. Simple interference suppression can be achieved by connecting the earth (17) of the electrical equipment, a...  
WO/1987/002527A2
The device for automatic control of direct current motors is characterized in that one armature current control unit (10) is mechanically attached to the motor rotor so as to rotate along with it and receives positive and negative DC sup...  
WO/1987/000363A1
A control circuit for an electric motor, in which the rotation speed and direction of rotation depend on a control signal (Ue) at the input terminal (10). The direction of rotation is provided by overstepping or failure to reach a specif...  
WO/1986/005042A1
A revolution number control apparatus for motors is provided in a circuit for applying an electric current to a motor (13) with a thyristor (14) for controlling the revolution number of the motor by controlling the phase thereof. When th...  
WO/1986/000995A1
An orbital shaker apparatus which has a tray (14) for cyclic motion is flexibly suspended from a frame (61) which is flexibly suspended from a plurality of stationary supports (54, 56, 58, and 60). The flexible suspension constrains the ...  
WO/1985/004534A1
A speed control system for a servo motor has means (1) which presumes speed (Vl) at the tip of the machine load as well as torque stress or resilient displacement (d) in the load transmitting system, based upon a speed signal (v) and a t...  
WO/1985/003061A1
In conventional reel tension control, it has been impossible to control reel tension ratio over a wide range exceeding 1:10, with a single D.C. motor. Hitherto, therefore, various measures have been taken for attaining such a high ratio ...  
WO/1985/002727A1
System for controlling the speed of a motor receiving a feedback signal from the motor and sending a command voltage to the motor. It has been found that such systems, in the past, are often inaccurate and that speed drift can affect the...  
WO/1985/002305A1
A transistor chopper for controlling the power delivered to a DC load (10) from a DC source (12) includes two or more transistors (Q1, Q2) connected in series between the DC source and the load and means (30, 32) for controlling the volt...  
WO/1985/000477A1
Controlled electric current supply unit for an active inductive charge. Each of the connections (51, 52) of the charge (5) is connected to at least one pole (6, 7) of a voltage source by a circuit element (1, 2, 3, 4) which may be for ex...  
WO/1985/000147A1
A travel DC motor (12) and a loading DC motor (18) are connected to a common battery power source (10). The motor (12) is supplied with current through a transistor chopper (28) whose on/off operation is controlled, and the motor (18) is...  
WO/1984/004635A1
A MOSFET "H" switch circuit (30) for providing bidirectional control to a DC motor (32). The power MOSFET's (40, 42, 44, 46) employed have significant advantages over bipolar and darlington power transistors and allow for microcomputer i...  
WO/1984/004007A1
A switch mode control circuit for a motor comprises switching transistors of the same conductivity type arranged in the four arms of a bridge circuit which is connected to the motor and to a voltage supply. Drive circuits for applying ba...  
WO/1984/000450A1
In an intermittent windshield wiper system in which the time between wiping cycles depends upon the degree of dryness of the windshield and upon the speed of the wiper blades on the downstroke of the wiping cycle toward the dwell positio...  
WO/1983/003440A1
The proposed electric circuit to control the driving of a window pane of a motor vehicle is arranged so that the motor (M1 resp. M2) may be started by means of a service switch (S1 resp. S2) also after switching off the ignition (opening...  
WO/1982/003362A1
Chopper control unit for an electric car. Two first chopper devices (CH1), (CH2) control the current of the armatures (A1), (A2) in a shunt motor connected to a power supply (L) for driving an electric car, a second chopper device (FCH1)...  
WO/1982/003298A1
Battery-operated motor control circuit. An adjustable voltage reference (18, 26, 28) is coupled to the battery (10), with the output of the adjustable voltage reference being coupled to the positive input of an operational amplifier (34)...  
WO/1982/002127A1
A digital servo control system for a d.c. motor (20) to achieve stepping motor precision and a wider speed control range than either a conventional d.c. motor or a stepping motor, as may be typically utilized in an IV syring pump. Motor ...  

Matches 851 - 900 out of 22,564