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Match Document Document Title
7323835 Brushless DC motor actuator having remote commutation sensing apparatus  
A brushless DC motor and Hall Effect commutation sensors are mounted on a common circuit board, and ferromagnetic elements partially embedded in the motor stator in proximity to the periphery of...
7295907 Recovery of calibrated center steering position after loss of battery power  
The steering angle of a vehicle is monitored using position sensors of an electric motor of an electric power assisted steering (EPAS) system. A position of the electric motor corresponding to the...
7268502 Method and arrangement for controlling the synchronous running of a plurality of electronically commutated motors  
A method of controlling synchronous running of a plurality of electronically commutated motors ( 22, 24, 26 ), each of which includes a stator having a stator winding ( 40, 42, 44 ), a...
7262570 Motor controller with enhanced noise immunity unbuffered hall sensors  
A method and apparatus of interfacing a Hall sensor to a commutation circuit comprises receiving output signals from the Hall sensor; detecting when the Hall sensor output signals are within a...
7262568 Brushless DC motor coupled directly to AC source and electric apparatus using the same motor  
A brushless DC motor is disclosed, in which a commercial AC source is full-wave rectified by a rectifier and then converted into a generally flat and low DC voltage not more than 45V by a DC...
7259531 Speed control of brushless DC motors  
The speed control apparatus comprises a plurality of Hall sensors, a plurality of switches, a turn-on control circuit, and a gate drive logic. The Hall sensors are configured to detect magnetic...
7196485 Universal low-power ceiling fan controller  
A universal low-power ceiling fan controller includes a brushless DC motor in a ceiling fan casing, a microprocessor connected to a power supply that operates with a remote-control device and has a...
7170253 Automotive door latch control by motor current monitoring  
Latch control methods and systems are disclosed, including a latch that receives power from a motor associated with a latch. A sensor can be provided for monitoring the current consumption of the...
7095194 Method for operating an electronically commutated (EC) motor  
In a method for operating an electronically commutated (EC) motor that has a primary part having a coil and a secondary part having magnet segments, a measuring sequence is determined that has a...
7095193 Brushless DC motors with remote Hall sensing and methods of making the same  
A brushless DC motor apparatus includes a housing and a stator assembly coupled to the housing. The apparatus further includes a magnetic rotor assembly rotatably coupled to the housing. The...
7005812 Commutation converter for a brushless servo motor  
An apparatus that allows a non-standard brushless motor to be driven with a standard drive amplifier. The motor rotation angle signal from a custom feedback device is converted to a standard format...
7002307 Single phase motor unit, method of driving single phase motor and integrated circuit  
A single phase motor driving unit comprises a first driving transistor supplying a single phase coil with a driving electric current in a certain direction, a second driving transistor supplying...
6998813 Device for generation of a signal dependent on rotational speed for an electric motor, in particular for an electronically-commutated DC motor  
The invention provides a device to generate an rpm-dependent signal, or a tachogenerator, having a plurality of magnet elements with alternating polarity which are arranged and distributed around...
6957641 Adjustment device for an internal combustion engine  
The invention relates to an adjustment device ( 1 ) for an internal combustion engine, particularly for adjustment of shafts with adjusting members. Heretofore known open/close switches are...
6954042 Three-phase BLDC motor system and circuit and method for driving three-phase BLDC motor  
A motor driving circuit is described for three-phase brushless DC motors, which have a three-phase-coil and first and second Hall sensors to detect the magnetic field of a rotor. The motor driving...
6924609 Control device/mechanism for a motor for adjusting a control unit  
The invention relates to a control device for a motor for adjusting a control unit. A motor ( 5 ) that serves for adjusting a control unit ( 20 ) is shut off in a known control device with at least...
6879119 Positioning controller  
A positioning controller includes a gear mechanism having a rotating gear for positioning a movable member, a brushless motor to drive the rotating gear, and a motor control circuit to rotate a...
6856110 Low pin counted D-C motor integrated drive circuit  
A DC motor drive circuit includes a switching circuit that drives the coils of a small permanent magnetic DC motor. The drive circuit is preferably implemented in an integrated circuit device, such...
6819068 Brushless DC motor having dual hall sensor  
A brushless dc motor mainly comprises a stator, a first Hall sensor, a second Hall sensor, and a rotor. The stator, which comprises a plurality of magnet poles, is axially combined with the rotor...
6747425 System for sharing power and signal pins on a motor controller  
The invention in the simplest form is a technique to provide for sharing of power and signal pins on a motor controller. The switching simply follows the magnetic switching detected by the Hall...
6744230 Method and apparatus for fine resolution brushless motor control  
A motor controller ( 30 ) includes three analog Hall-effect sensors ( 42, 44, 46 ) for forming continuous-time signals proportional to the sine and cosine of the position of the rotor ( 24 ) of a...
6741048 Pulse-controlled electronically commutated motor  
The invention relates to an electronically commutated motor ( 1 ) comprising P phases and N pairs of poles, in which a circular multipole encoder ( 12 ) is associated with the rotating ring ( 6 a )...
6731083 Flux feedback control system  
An electrical machine includes a rotor, a stator operably coupled with the rotor, at least one phase winding operably coupled with the rotor and stator and arranged to establish flux in a magnetic...
6731082 DC motor constant speed PWM control  
A pulse width modulated (PWM) output signal controller circuit is provided for controlling operation of an electronically commutated, direct current (DC) motor. This DC motor may be used for...
6686713 Pulse-controlled electric power-assisted steering system  
The invention relates to an electric power-assisted steering system making it possible to apply an assist torque for the angular displacement of the wheels of a vehicle, said torque being applied...
6593715 Single-phase motor with a conversion circuit  
A single-phase motor comprises a [US79KUA] two-phase motor driver IC, a conversion circuit, and a coil for a motor. The driver IC includes two outputs that are serially connected to the conversion...
6437526 Commutation system for torque ripple minimization  
A system for reducing torque ripple in an electric motor, comprising an electric motor having a stator and a rotor, a first set of N Hall sensors, a second set of N Hall sensors, a controller, and...
6362581 Device and method for starting a brushless motor  
Device and method are provided for starting a brushless motor easily enables reliable motor starting, and prevents overcurrent supply when starting the motor. The permanent magnet rotor is firstly...
6359406 Three-phase direction-current (DC) brushless motor with hall elements  
Disclosed is an improved three-phase direct-current (DC) brushless motor with Hall elements, in which two Hall elements instead of three Hall elements are placed upon the driving circuit of the DC...
6335598 DC brushless motor system with capacitors  
The present invention relates to a brushless motor system. The brushless motor system has a brushless motor, a motor driver, and at least one sensing circuit. The brushless motor has a rotor, and...
6310450 Drive system of a brushless motor equipped with hall sensors self-discriminating the actual phasing of the installed sensors  
A method is for decoding three logic signals produced by three Hall effect sensors installed in an electronically-switched three-phase brushless motor according to a sequence of six driving phases...
6166501 Index signal generating circuit  
An index signal generating circuit for generating a precise index signal free from time shifting even under ambient temperature changes. An index signal generating circuit includes a magnet...
6140781 Control method and apparatus for driving a head drum assembly of a video cassette recorder  
A control method and an apparatus for precisely driving a motor of a head drum assembly by using impulse generation magnets in a video cassette recorder is disclosed. While a displacement of a hall...
6020700 DC brushless motor drive circuit having input signal compatability to hall effect ICs and hall sensors  
A motor drive circuit includes an amplifying and comparing circuit, a multiplexer, an input control circuit and a drive pulse generator. The amplifying and comparing circuit receives an output...
5982122 Capacitively powered motor and constant speed control therefor  
A capacitively powered motor having a power switching circuit adapted to be connected between a power source and its winding for selectively energizing the winding to generate a magnetic field...
5969489 Motor driving system for driving brushless motor  
A motor driving system for a brushless motor is comprised of a drive magnet, a rotor provided with the drive magnet and supported by the shaft, 3-phase stator coils provided on a substrate and...
5892339 Three-phase brushless DC motor driving circuits and methods using one hall signal  
A three-phase brushless dc motor driving circuit can use only one Hall signal. The magnitude and phase of the Hall signal is used for commutation in order to perform soft switching, and an index...
5874814 Brushless motor driven by applying varying driving signals  
A brushless motor driving device includes a comparator. The comparator compares a control voltage with a control signal in proportion to a control current of each Hall element. An output of the...
5859510 Commutation board for brushless motor  
A board for commutation of a brushless motor having an encoder comprising a plurality of Hall-effect sensors operative for providing commutation information to a motor controller including an...
5804936 Motor controlled surgical system  
A surgical system, adapted to operate with at least one surgical device, has a handpiece containing a motor which is adapted to receive the surgical device. The surgical device is driven through a...
5552682 Device for detecting rotational position of brushless motor  
A signal of one pulse per turn of a motor is obtained by using an m-phase driving coil (L) to be reciprocally electrified in positive and negative directions; a driving magnet which faces the...
5493187 Method and apparatus for controlling brushless motor  
The rotation speed of a brushless motor is detected to generate a signal synchronizing with the rotation of the motor, and, on the basis of the synchronizing signal, a plurality of duty signals...
5469030 Direct current motor drive apparatus  
A direct current motor drive apparatus generating low levels of heat is described. A pulse width modulation signal, generated by a pulse width modulator corresponding to a torque command signal, is...
5414331 Drive circuit for brushless motor  
A drive circuit for a brushless motor having a rotor formed of a permanent magnet and stator coils includes a plurality of magnetic sensors each for sensing a rotational position of the rotor of...
5382890 Integrated circuit driver having current limiter for brushless motor  
An integrated circuit driver for a brushless motor having an encoder which includes a plurality of Hall-effect sensors operative for providing commutation information to a motor controller includes...
5319291 Brushless motor utilizing FET drivers  
A programmable logic device for commutating a brushless motor having an encoder with a plurality of Hall-effect sensors operative for providing commutation information to a motor controller for...
5291104 DC commutatorless motor  
A DC commutatorless motor in which one pulse is generated per one revolution is disclosed. The motor comprises: three-phase stator windings; a rotor having 2n magnetic poles (where n is a natural...
5289099 Direct current motor  
A three-phase Y-connection direct current motor, which is not only capable of operating at a high efficiency and at high speeds but also small-sized and inexpensive. A position detection device...
5287009 Circuit module fan assembly  
An electronic circuit module fan assembly is disclosed including a circuit module housing, circuit modules, and a fan module. The fan module has a fan unit for cooling the circuit modules. The fan...
5281903 Method for drivingly controlling a variable reluctance type motor  
A drive control method for a variable reluctance type motor capable of improving the motor efficiency by preventing generation of a disturbance torque. In function generators (8A to 8C) of a...
Matches 1 - 50 out of 165 1 2 3 4 >