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Patent Searching and Data


Matches 701 - 750 out of 22,665

Document Document Title
WO/2002/097448A1
This invention relates to a method for determining the frequency of the current ripple contained in the armature current signal of a commutated d.c motor. Said frequency is determined by calculating the difference between the result obta...  
WO/2002/097962A1
The invention relates to a method for determining the rotational position of the drive shaft of a commutated DC motor by evaluating the digitized current ripples contained in the armature current of the DC motor. The inventive method is ...  
WO/2002/097449A1
A method for correcting the determination of the rotational position of a commutated d.c. motor drive shaft, by evaluating the current ripple contained in the armature current signal when double or missing ripples occur. The method is ch...  
WO/2002/095924A1
A method for determining the rotating position of the drive shaft of a commutated direct current motor by evaluation of the current ripple contained in the armature current signal when erroneous ripples occur; if no other current ripple ...  
WO/2002/094636A1
The invention relates to a method of interrupting the stator winding circuit of a synchronous electric motor (1) with n phases (n $m(G) 2) comprising at least n 1 relays (2a, 2b) which are each connected to a different phase. According t...  
WO/2002/095925A1
A method for determining the rotating position of the drive shaft of a commutated direct current motor by evaluation the current ripple contained in the armature current signal, wherein the metered result of the detected current ripple i...  
WO/2002/091560A1
The invention relates to a drive unit, particularly for a blower in motor vehicles. The drive unit comprises an electric motor (12), which operates on a d.c. mains (U¿Bat?), and comprises a device (13) for controlling the rotational spe...  
WO/2002/089308A1
The invention relates to a control for a half-bridge, particularly for actuating the electric motors, which comprises a first electronic switch arranged between a supply and a phase tap and a second electronic switch arranged between the...  
WO/2002/086647A2
The invention relates to an arrangement for automatically influencing a mains supply. A voltage transformer is provided as a pilot transformer which detects the real value of the voltage which is to be adjusted and which transmits said v...  
WO/2002/071593A1
The invention relates to a circuit arrangement for supplying a direct current machine, comprising an armature winding (14) and a field winding (11). According to the invention, the field winding (14) is connected to a phase (7) of the sa...  
WO2002050618A3
A power generation system is disclosed having several embodiments such as in one embodiment, the power generation system includes a fuel source to provide fuel, a turbogenerator (200), coupled to the fuel source, to generate AC power, an...  
WO/2002/051591A1
A control module (18) advantageously reduces cost and enhances reliability, design flexibility, ease of assembly, and performance of a flywheel operated hand tool (10). The control module (18) includes a thin film printed circuit with no...  
WO/2002/051592A1
A speed controller operates a DC-powered fastener drive assembly to efficiently drive fasteners from a DC power supply (22), thereby achieving a fully portable hand tool. In particular, the speed controller accelerates a flywheel (28) wi...  
WO/2002/050618A2
A power generation system is disclosed having several embodiments such as in one embodiment, the power generation system includes a fuel source to provide fuel, a turbogenerator (200), coupled to the fuel source, to generate AC power, an...  
WO/2002/049202A1
A PWM control unit which outputs to a power supply unit a PWM signal matching a PWM target value for the servo-control of a dc motor, and which comprises a synchronous control unit, a PWM operation unit, a PWM target value selection unit...  
WO/2002/043236A2
A circuit to bypass the Zener diodes in the flyback circuit of a DC brush motor actuator which uses a voltage sensitive device to detect when the power to the motor is de-activated to control a switch that short circuits the Zener diodes.  
WO/2002/037662A1
The invention relates to the circuit arrangement of an electromotor comprising two terminals, in which the electromotor can be actuated for operation in both rotational directions. When no current is supplied to the electromotor, one of ...  
WO/2002/037646A1
A closed loop control system for a electromagnetic clutch or brake (312) has a motor to provide force, a transducer (304) to read the force and produce an error signal, and an amplifier (311) to compare the error signal to a reference si...  
WO/2002/034587A1
The invention relates to a contact washer system, comprising a rotatable contact washer (10) and several contact elements (12, 14, 16, 18), the contact washer (10) having a plurality of paths (20, 22) and each contact element (12, 14, 16...  
WO2000070738A3
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/2002/027955A1
Disclosed is a circuit and method for preventing erroneous opening and closing caused particularly, by use of a DC motor in an automatically/manually foldable portable radio terminal having a main body and a sub-body rotatable with respe...  
WO/2002/023710A1
Disclosed is a pole-change type motor that provides a variable-speed (two-pole or four-pole type) operation system capable of reducing the load of the motor of the normal operation system and improving the cooling efficiency. In case of ...  
WO/2002/023736A1
A circuit (12) for recovering a current sense signal which is offset by a common mode displacement, such is the case when the signal is the voltage across a current sense resistor located on the high side bus or between the switches of a...  
WO2001084063A3
A cooling system for a vehicle includes a shroud attachable to a fixed portion of the vehicle. A stator assembly (23) for a brushless DC ring motor is attached to at least one mounting support of the shroud (16). A cooling fan (14) is pi...  
WO2001022095A8
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...  
WO2000035689A3
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/2001/095471A1
The invention relates to a method for detecting the rotational position of the drive shaft of a DC motor and especially the position of an element driven by the drive shaft within a predetermined path of movement by evaluating the curren...  
WO/2001/095474A1
The invention relates to a method for determining the position of an element driven by the direct current motor within a predetermined displacement trajectory between two block positions, by evaluating the current fluctuations contained ...  
WO/2001/094140A1
The invention relates to a method for determining the position of an element driven by the drive shaft of a direct current motor within a predetermined displacement trajectory between two block positions, by evaluating the current fluctu...  
WO/2001/095473A1
The invention relates to a method for providing a digital current fluctuation signal from the analogue armature current signal of a direct current motor that is supplied with current. The method is characterised in that, • the analogue...  
WO/2001/094733A1
The invention relates to a method for determining the rotational position of the drive shaft of a direct current motor by evaluating the current fluctuations contained in the armature current signal. The method is characterised in that i...  
WO/2001/095472A1
The invention relates to a method for determining the rotational position of the drive shaft of a direct current motor by evaluating the current fluctuations contained in the armature current signal. The method is characterised by the fo...  
WO2001054263A8
A motor control apparatus (104) for a railway switch machine (106) includes a power source (134) for a voltage; a selector (132) for providing the voltage to a reversible motor (105) of the switch machine (106) in a normal state, and for...  
WO/2001/084063A2
A cooling system for a vehicle includes a shroud attachable to a fixed portion of the vehicle. A stator assembly (23) for a brushless DC ring motor is attached to at least one mounting support of the shroud (16). A cooling fan (14) is pi...  
WO/2001/082454A1
The invention relates to a device for use in an electronic driving dynamics control system, comprising an electromechanical converter, especially an electromotor, a hydraulic pump (17), and an electric control device (4, 5, 16) for the c...  
WO2001041166A3
The invention relates to a changeover switch for changing between two current paths (1, 2; 3, 4) of a DC circuit that comprises in every current path a bridge contact system (110, 120; 230, 240) with two contact paths (111, 112; 121, 122...  
WO/2001/069755A1
A dual-mode system for inexpensively operating electrically powered double-insulated devices (12), such as hand-held power tools and appliances. The system includes a cordless battery power module (14) that supplies the power and current...  
WO/2001/059921A1
The invention relates to an arrangement for supplying a user (12) that consumes power in a non-continuous manner from a d.c. system (U¿B?). The arrangement comprises a d.c. link (14, 22). The user (12) can be connected to said link. A c...  
WO/2001/054262A1
A motor control apparatus (52) for a reversible motor (54) of a railway switch machine includes a conditional power source (50) having an output voltage (96). A motor control circuit includes inputs (+, -) for inputting the voltage from ...  
WO/2001/054263A1
A motor control apparatus (104) for a railway switch machine (106) includes a power source (134) for a voltage; a selector (132) for providing the voltage to a reversible motor (105) of the switch machine (106) in a normal state, and for...  
WO/2001/051302A1
The invention relates to an electric circuit arrangement for controlling a unit, such as an adjustment system for windows or a sliding sunroof, that is driven in an electromotoric manner and is situated in a motor vehicle. The aim of the...  
WO/2001/050587A1
A control system (10) for an electric vehicle/golf car having a shunt wound motor including an amarture coil (22) and a field coil (24). The system includes one MOSFET (34) connected in parallel across the armature coil, along with a fre...  
WO/2001/041166A2
The invention relates to a changeover switch for changing between two current paths (1, 2; 3, 4) of a DC circuit that comprises in every current path a bridge contact system (110, 120; 230, 240) with two contact paths (111, 112; 121, 122...  
WO1999062675B1
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/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...  

Matches 701 - 750 out of 22,665