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Match Document Document Title
8089231 Electric motor, method for correcting sensor output for the same, and control circuit  
The electric motor includes a coil array having a plurality of magnetic coils; a magnet array having a plurality of permanent magnets; a magnetic sensor outputting an output signal that changes in...
8089233 Physical quantity conversion sensor and motor control system using the same  
A first sensor element outputs a first output signal in correspondence to a direction of the magnetic flux lines acting from the outside. A second sensor element outputs a second output signal...
8078425 Device for detecting the angular position of a rotor of a polyphase rotary electrical machine and rotary electrical machine containing such a device  
A device for detecting the angular position of a rotor of a polyphase rotary electrical machine contains a stator and a plurality of magnetic field sensors (200) delivering first signals...
7999496 Method and apparatus to determine rotational position of an electrical machine  
A control system and method to determine position of a rotor relative to a stator for a synchronous multipole electrical machine is presented, including one for application on a fuel/electric...
7973503 Motor system employing analog encoded hall effect sensor position information for reduced wiring  
A system has a sensor assembly mounted adjacent to a moving magnetic member such as a motor rotor to sense its position. The sensor assembly includes Hall-effect sensors each having a binary...
7915888 Systems and methods for detecting angular position  
Methods and systems for detecting an angular position of an electric motor are disclosed, including sending an electrical pulse through a stator coil of the electric motor, determining an...
7859105 Power converter, power system provided with same, and mobile body  
To provide a power converter equipped with a current detector which is small and can carry out highly accurate current detection, in the power converter equipped with a power module 16 having a...
7800326 Brushless D.C. motor with RFID rotor magnet position sensing  
A brushless D.C. motor has a rotor with a plurality of magnets secured to a mounting surface. Each magnet has an RFID tag secured to a magnet surface, with each RFID tag having stored therein a...
7705551 Switching flap device  
An actuating device for actuators, such as switching, throttle or swirl flaps, in internal combustion engines for motor vehicles comprises a shaft connected with an actuating motor. The shaft is...
7615949 Motor control apparatus  
A motor control apparatus includes a fan motor, a hall IC, a first power generator, and a second power generator. The hall IC is coupled with the fan motor for detecting the status of the fan...
7589485 Motor control circuit, fan motor, electronic device, and notebook personal computer  
A motor control circuit comprising: a rotation control circuit configured to control rotation of a motor based on a rotation control signal for controlling rotation of the motor and a rotational...
7542879 Virtual sensor based control system and method  
A method for a virtual sensor system corresponding to a target physical sensor is provided. The method may include selecting a plurality of measured parameters provided by a set of physical sensors...
7285931 Brushless motor commutation and control  
A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more...
7151349 Fan speed control  
A method of synchronizing a pulsed drive signal applied to a DC fan motor to the TACH output of the motor is described. DC motors include a rotor that rotates in a path defined by a plurality of...
7141950 Fan control utilizing bi-directional communication  
A system and method for bi-directional communication between a system controller and a fan controller: The system operates in two modes and there are two communication paths between the system...
7092623 Method and apparatus to achieve accurate fan tachometer with programmable look-up table  
A system and method for measuring the speed of a fan is presented. The duty cycle of a pulse width modulated (PWM) power signal may control speed of the fan. The fan may generate tachometer pulses...
6891346 Commutation and velocity control system for a brushless DC motor  
A commutation and velocity control system of a brushless DC motor receives a velocity command signal and provides command signals to drive the brushless DC motor. The system includes a summer that...
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 (6a) of an...
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...
6683427 Device for controlling an electronically commutated motor  
The invention relates to a device for controlling an electronically commutated motor (1) comprising P phases and N pairs of poles (5), said device comprising: a circular multipole encoder (4)...
6650074 Fan speed controller with conditioned tachometer signal  
The speed of a fan motor is controlled by varying a DC voltage to the fan motor. A series pass transistor is used to vary the DC voltage to the fan motor. A power management controller sets the fan...
6570351 Sensorless motor driving apparatus  
When a rotor of a brushless motor 1 is at rest, excitation is performed three times such that excitation phase is switched each time an excitation is performed thereby to ensure that the rotor...
6404152 Motor control device  
In order to reduce undesired sound caused by circular ring oscillation in the diametric direction of the stator by an electromagnetic force, electromagnetic force drift memory stores a drift...
6211634 Method and apparatus for initialization and operation of field-commutated motors and machines incorporating field-commutated motors  
Methods and apparatus are disclosed for calibrating a field-commutated motor (10) when under load, wherein initializing the motor (10) refers to relating data representative of the angle of the...
6150778 Sensorless rotor position detection for switched reluctance machines having irregular poles  
A system for detecting the position of a rotor for a switched reluctance (SR) machine having an irregular pole configuration. The system does not require the use of a conventional sensing device,...
6107760 Non-stop variable AC motor  
As stated earlier, the technical purpose of the present invention is to solve inconvenience in use and installation of the AC motor with a controller, and to provide the AC motor available for mass...
5770933 Blower motor with adjustable timing  
A brushless DC motor with an adjustable timing feature is provided. The timing adjustment allows a specific motor's performance to be optimized by compensating for individual variations both in the...
5663619 Sensor intended to detect the rotational position of a rotatable device  
A sensor which is intended to detect the rotational position of a rotatable device, e.g. a shaft or a rotatable hatch, which is rotatable, preferably by a motor, incorporates a position detector...
5574342 Brushless motor  
A brushless motor comprises a stator having a drive coil and a stator core, and a rotor. The stator has a plurality of main teeth and a plurality of auxiliary teeth arranged between the plurality...
5469032 Electric motor control with malfunction detection  
A motor for an electromobile includes a rotor having permanent magnets and a stator coil for generating an output torque when fed with a motor current. A rotor position detector or resolver is...
5382889 Self-commutating, back-EMF sensing, brushless DC motor controller  
A method and apparatus to commutate the drive voltages of a brushless DC motor. The present invention determines rotor position and velocity by detecting the polarity reversal of the Back-EMF of an...
5317242 Motor-driving circuit and wire-bonding apparatus  
A motor-driving circuit is used for driving a motor which is of a type including a rotor whose rotating shaft has a permanent magnet used for generating magnetic flux, and an armature having...
5278482 Three-phase reluctance type motor  
The present invention relates to a three-phase reluctance type motor with a large output torque which can be used as a driving source of various industrial apparatus. There are provided adjacent...
5146145 Electric drive system for submarine machinery  
An electric drive system that is used in submarines, for powering or contling towed arrays handling systems and other machinery, which has at least one submersible brushless direct current motor...
5041773 Drive circuit for stepping motor  
A drive circuit for a stepping motor which seeks the read/write head of an FDD or the like to a predetermined track. The drive circuit includes a plurality of exciting coils for providing exciting...
5006768 Synchronous motor control  
The problem of efficiently starting a motor (16) which is used to start an engine (12) during engine start is solved with a motor control unit (30) which includes a resolver (34) having a primary...
4899093 Circuitry for electronically commutating a direct-current motor  
A circuit arrangement for electronically commutating a multi-phase direct-current motor, in which a predetermined number of markers are distributed around the circumference of the rotor. A sensor...
4896089 Fault management system for a switched reluctance motor  
A fault management system for a switched reluctance motor detects faults through phase current differential sensing and phase flux differential sensing and isolates any fault by deactivating any...
4868468 Screened inductance sensors for brushless d.c. motors  
In a screened inductance sensor for a brushless d.c. motor, a sensor rotor carrying conductive screens is mounted on an extension of the motor shaft. A single solenoidal drive winding on a stator...
4862045 Method and apparatus for controlling the number of revolutions of a rotor  
A method of controlling the number of revolutions of a motor using the output of a tachogenerator, which determines the number of revolutions of the rotor, to regulate the motor. To improve the...
4862044 Method for adjusting encoder in a brushless motor-encoder combination  
A method for adjusting an encoder directly coupled with a brushless motor, wherein a set of sensor match marks are provided on a sensor base plate mounting a number of sensor elements, while...
4847540 Circuit for controlling the switching of a motor and application to the variation of speed of the control circuit  
The disclosed control circuit for switching a brushless direct current motor comprises and energizer element (95) rotationally integral with the rotating element of the motor, said energizer...
4777414 Driving arrangement for a drive motor  
The disclosure is related to a driving arrangement for a drive motor which is provided with an electronic power stage (9) which is controlled by a current controller (13). During the commutation...
4763052 Method and means for driving a brushless D.C. motor  
A brushless D.C. motor drive circuit provides full available D.C. bus voltage to the motor during periods of motor speed acceleration and deceleration and modulated D.C. voltage to the motor during...
4743813 Direct current motor with electronic commutation circuit and encoder-controlled winding power  
The commutation of the motor which has no commutator is by electronic commutation, the excitation being carried out by p pairs of permanent magnets (12) carried by the rotor (10). The powering of...
4740733 Autosynchronous motor comprising a device for determining the position of the rotor relative to the stator, and method of starting such motor  
An autosynchronous motor comprises a control and power circuit for the windings of a stator generating a rotating field the angular direction of which is a function of the magnetizing direction of...
4723100 Brushless motor with a rotor pole position detector associated with each armature winding and electrically connected to another armature winding  
A brushless motor includes a plurality of stator armature windings having winding frames with spaces defined therein, respectively, a rotor mounted on a rotatable shaft and having field poles...
4703235 Brushless DC motor  
A brushless DC motor employs a set of coils positioned around the motor axis to respond to an aximuthal pattern of changing eddy current sensitivity. Rf voltage is frequency-multiplexed on the...
4700115 Method of starting an electronically commutated direct-current motor  
Process for starting an electronically switched d.c. motor with n coils cyclically activated by pulses which are derived from the rotation of the motor. First, each time motor is switched any...
4642539 Torque motor with unlimited angular excursion  
A bidirectional DC motor having a rotatable permanent magnet rotor structure within a ring core bearing helical windings is arranged to provide smoothly continuous torque over very wide excursion...
Matches 1 - 50 out of 120 1 2 3 >