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Patent Searching and Data


Matches 801 - 850 out of 22,569

Document Document Title
WO/1996/034541A1
The invention relates to a device for fitting rivets, buttons or the like in textiles or the like with a ram driving the rivets, the upward and downward movement of which is controlled by the co-operation of the upper end of the ram with...  
WO/1996/033891A1
A multi-functional apparatus (43) employs a plurality of intermittent motion mechanisms. A single electromagnetic device selectively causes movement of the intermittent motion mechanisms thereby moving mechanical devices coupled thereto....  
WO/1996/033892A1
A control system for an automotive vehicle multi-functional apparatus employs an electronic control unit (251) operably controlling a rear window wiper assembly. In another aspect of the present invention, an electronic control unit is o...  
WO/1996/028883A1
A circuit for driving an electric motor (10) has a triac (24) connected in parallel to the electric motor (10). The triac (24) receives a first control signal (28) that depends from the voltage at a first terminal (11) of the electric mo...  
WO/1996/027229A1
The invention concerns a method for monitoring and controlling the opening and closing process of an electrically powered unit comprising various mechanical components. The unit has an electrical servomotor which can be influenced throug...  
WO/1996/021967A1
A PWM speed regulating apparatus for a DC elevator comprises a rectifier and filter (1), voltage suppressor (2), chopper voltage regulator (3), system controller (4) and a driving protector (5). The speed of DC motor is regulated by a pu...  
WO/1996/020529A1
A controller for DC motor is provided with an FET (206) which is connected between one end of a motor (201) and the positive electrode of a battery EB, a diode (203) through which the electric current having flown through the motor (201)...  
WO/1996/019859A1
In step Sb3, the duty ratio calculated in step Sb2 based on feedback control is compared with the limit value of the duty ratio corresponding to the limit battery current. When the duty ratio is smaller than the limit value, the PWM wave...  
WO/1996/019038A1
The invention concerns a rotational speed control device for an electric motor (11) fed by a direct voltage source (13). The device has a controlled switch device (23) by means of which the motor voltage is alternately switched on and of...  
WO/1996/018848A1
The invention concerns a control circuit for a vehicle heater fan drive motor. The control circuit comprises a voltage divider which emits a signal (S) representative of the supply voltage to a microcomputer (12) where the measuring sign...  
WO/1996/016466A1
A window blind actuator (400) has a motor powered by dc batteries and is mounted in the head rail (404) of a vertical blind (406) and coupled to a rod element (416) for rotating the slats (410) of the blind (406). Alternatively, a window...  
WO/1996/016467A1
An electric drive has a direct voltage electric motor that is mounted in a housing (11) and has motor windings. An electric motor controlling circuit with a switching regulator is connected to the motor windings, is arranged on a printed...  
WO/1996/009688A1
The proposal is for a process and circuit for controlling fans fitted, for example, in power supplies to cool the components therein, which provide control operations on the basis of control pulses (Ust) derived from the fan input curren...  
WO/1996/003798A1
A rotation speed controlled multi-pole pair d.c. motor (1) is to be operable at least two working points (10, 20). Upstream of the pole pairs of the motor (7) is an electronic circuit which connects or disconnects the individual pole pai...  
WO/1995/033304A1
A DC motor control system reduces power demands imposed upon a DC power source (10) energizing a utilizing device (74) by varying the time during which power application occurs, but not the magnitude of the power which remains constant. ...  
WO/1995/033303A1
In order to control the stoppage, acceleration, deceleration, reverse rotation, etc., of a motor (1) based on the signal obtained from a detecting means which detects the torque of the stator (3) of the motor (1), the stator (3) is suppo...  
WO/1995/031853A1
A commutator circuit includes a bridge (1), which may have a half-bridge or full-bridge topology, and a switched resonant arm (3, L, C). The resonant arm is coupled to the midpoint of the bridge, directly, or via a current buffer, or via...  
WO/1995/028762A1
The low cost speed governor for internal combustion engines may be completely powered by the ignition coil. The governor receives a periodic signal from the primary ignition winding (W1) that is indicative of the actual speed of the engi...  
WO/1995/017038A1
A light beam, which scans in opposite directions across a bar code (24), is controlled in velocity and scan angle by monitoring the voltage across a winding (12) of a motor (10), such as one of the phase windings (12) of a two phase step...  
WO/1995/012840A1
The invention pertains to a switched-mode power supply with a primary clocked flyback converter for a controlled supply to an electrical consumer (6; 61, 62) from an input voltage supply of optionnaly variable voltage type and level, whe...  
WO/1995/009478A1
In a braking circuit for a universal motor, the field coil or coils are connected in series to the armature during braking by means of a semiconductor switch, preferably a field effect transistor or a thyristor. As the semiconductor swit...  
WO/1995/007572A1
Proposed is a device for controlling a power consumer in a vehicle. The device has at least two switching elements for controlling the current flowing through the consumer, the current flowing through each of the switching elements being...  
WO/1995/006974A1
In an embodiment, the invention provides a motor control system comprising an adjustable frequency driver (10) coupled between the motor (14) and a power supply (12), a programmable controller (16) coupled to the driver and operative to ...  
WO/1995/005704A1
A device for driving a power controlling element of a vehicle driving unit has a full bridge end stage and a direct current motor arranged in the bridge diagonal. The current through the direct current motor is limited to at least one pr...  
WO/1994/029943A1
A mini blind actuator has a motor and a housing (30) that holds the motor (60) and a dc battery (40). The rotor of the motor is coupled to the baton (22) of the mini-blind for rotating the baton and thereby opening or closing the slats o...  
WO/1994/027349A1
The proposal is for an electric motor drive with overload protection for the electric motor (10) which receives input (18) predetermining a reference position for a moving part. When the overload protection responds, the reference positi...  
WO/1994/022212A1
An obstruction detection apparatus (44) is provided for use in closing a power driven vent, such as a window, that is located in an opening. The vent includes a first closing edge that moves as the vent is closed and the opening includes...  
WO/1994/020890A1
A motor control system (10a) for controlling operation of a vehicle. The system monitors and stores data relating to the operating current and detects occurrences of abnormal loads applied to the vent by determining whether the monitored...  
WO/1994/016372A1
A low loss recirculation apparatus for recirculating current through an inductive load (101) includes an active recirculation circuit. The low loss recirculation apparatus includes a control device (201) with a drive output (203) that pr...  
WO/1994/014232A1
A converter for generating direct current with selectable polarity and voltage from two-phase alternating current or threephase current has at its input side a rectifier arrangement with a transformer (1) whose secondary side (1b) is des...  
WO/1994/014229A1
A circuit arrangement for automatic load current back regulation consists of a series circuit connected to a d.c. voltage source (U) and consisting of a load (2) and a first electronic switch (1) which is controlled by a driver (3) and w...  
WO/1994/005031A1
A free-wheeling safety switch (10) is intended for controlling a power supply (74) for a motor (76) and includes a linked single-throw conductor (14) and a double-throw conductor (40). A fusible link is located between the poles of the c...  
WO/1994/003968A1
During a blanking period from the actuation of the motor driving to a given time T, the motor current is not compared with its threshold value. During the latter stage Tm of the blanking period, a catching of anything in the window is de...  
WO/1994/003969A1
A drive circuit for a resonant reciprocating motor, particularly for driving compressors and the like. This circuit provides a drive signal with a substantially constant amplitude having a frequency of substantially the resonant frequenc...  
WO1993020611A3  
WO/1993/023920A1
A control circuit, in particular for a direct current motor control in positioning systems, has a differential circuit (1), control logic (2) and a full bridge (3) connected between a supply voltage V¿S? and a reference potential GND. T...  
WO/1993/019949A1
Optimal constructions for two motor/controller configurations (20) are disclosed. The controller structure includes an H-bridge (48) for controlling field current using synchronous-rectification of MOSFET (58, 60, 62, 64) devices, and a ...  
WO/1993/020611A2
A MOSFET (50, 51) control topology and a physical structure for a motor control which provide a more efficient and economic DC motor control are disclosed. The control topology introduces a synchronous-rectification technique wherein fre...  
WO/1993/019406A1
A control apparatus (10) controlling the operation of a pulse width modulator for an electric clutch (32) in portable spray painting equipment (13) having a pressure transducer (18) for sensing the pressure, a manually adjustable pressur...  
WO/1993/019458A1
An active attenuation system for a DC motor (11) which yields global vibration reduction of slot or other motor induced tonals at the plate on which the motor is mounted without modifying the construction of the motor. The system compris...  
WO/1993/014559A1
A pulse width modulation speed control for a d.c. motor (12). A control input (26) corresponding to a motorist setting or a sensed condition is coupled to pulse width modulation circuit (16) that generates a variable duty cycle signal. T...  
WO/1993/007675A1
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, amplifying and conditioning circuit (133), a triangular waveform generator ci...  
WO/1993/006643A1
In an electrical device, an electricity consumer (2) is powered by a battery (B) via an electronic switch (21). To indicate the state of charge of the battery there is a display (9) and a timer (5) ascertains the period for which the con...  
WO/1993/005524A1
Two transistors provided in one arm of an H-bridge circuit for driving a rotary solenoid are prevented from burning by switching them on simultaneously. A CPU issues a first command signal, which commands the rotary solenoid to turn in t...  
WO/1993/003538A1
A solid-state motor power control (40) for portable paint pumps having a MOSFET power control device (50) operated from a solid-state electronic control circuit wherein the control circuit utilizes an operational amplifier (62, 68) to se...  
WO/1992/019038A1
The invention concerns the determination of machine-related electromagnetic and mechanical state variables on electrodynamic induction machines supplied via converters, such as asynchronous machines, synchronous machines and reluctance m...  
WO/1992/008267A1
Disclosed is a control circuit for a servomotor (M), the circuit using current pulses and supplying a current-controlled final stage (1). The growth in current is monitored, when the final stage (1) is driven, to detect a possible short-...  
WO/1992/008275A1
An impact load controller (28) compensates for the speed drop of a drive motor (12), which speed drop is caused by a load disturbance applied to the drive motor (12). A change in the dynamics of a speed controller (30, 34) in a speed reg...  
WO/1992/007421A1
The present invention proposes a process for controlling electric motors with independent excitation and pulse-length modulated drive in which the efficiency of the motor on parking is relatively high and the point of the deflection mano...  
WO/1992/006533A1
Motor (10) built for direct current with separate excitation fed with alternating current through a rectifying electronic circuit and having, in the input conductor (13) for direct current in the motor (10), a diode (15) associated to an...  

Matches 801 - 850 out of 22,569