Matches 1 - 50 out of 194 1 2 3 4 >


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US20110095714 ELECTRIC PUMP DEVICE  
Provided is an electric pump device that can continue to supply hydraulic pressure to hydraulically actuated equipment and that is also of reduced size. An electric pump device is provided with an...
US20110163704 METHOD AND APPARATUS FOR MONITORING A SYSTEM INCLUDING A SENSORLESS ELECTRIC MOTOR  
A multiphase alternating current permanent magnet synchronous electric motor is coupled to an actuator. A sensorless electric motor drive control system controls operation of the electric motor....
US20150130379 GROUND FAULT DETECTING CIRCUIT AND POWER CONVERTING DEVICE INCLUDING THE SAME  
In the ground fault detecting circuit, one terminals of first to third resistance elements are connected to first to third AC lines, respectively, the other terminals of the first to third...
US20130193885 METHOD FOR OPERATING A BRUSHLESS ELECTRIC MOTOR  
A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring...
US20110227521 METHOD OF STARTING A FAN  
A fan starting method including following steps is provided. A fan module including a control unit and a fan is provided, wherein the control unit and the fan are electrically connected with each...
US20120070168 LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY  
A load abnormality detection apparatus detects a load abnormality in first and second rotational members acting on each other. An inclination calculation part calculates an inclination of a second...
US20140184117 METHOD AND DEVICE FOR OPERATING A BRUSHLESS MOTOR  
A method and device for operating a brushless electric motor, having windings controlled by an inverter using six switches. The inverter includes three outputs that are associated with the...
US20150008849 Motor Control for Stability and Power Supply Protection  
A method and apparatus for controlling a motor. The motor comprises windings. A switch bridge comprising a plurality of switches is configured to couple a power source to the windings. A motor...
US20110080126 MOTOR DRIVE DEVICE  
A motor drive device has a drive unit for driving a motor based on an ON/OFF operation of a switching element by a PWM (Pulse Width Modulation) signal. The motor drive device uses a PWM control...
US20120074883 ELECTRIC POWER TOOL  
An electric power tool includes a three-phase bridge motor circuit including upper and lower switching units of U, V and W phases arranged in upper and lower rows; a brushless motor rotationally...
US20130141026 MOTOR WITH CIRCUITS FOR PROTECTING MOTOR FROM INPUT POWER OUTAGES OR SURGES  
A DC motor is provided. The DC motor prevents rush or overload of current in the DC motor during and/or after power input irregularities to the DC motor. A control circuit of the DC motor is...
US20120286709 MOTOR WITH CIRCUITS FOR PROTECTING MOTOR FROM INPUT POWER OUTAGES OR SURGES  
A DC motor is provided. The DC motor prevents rush or overload of current in the DC motor during and/or after power input irregularities to the DC motor. A control circuit of the DC motor is...
US20150263655 REVERSE ROTATION BRAKING FOR A PM MOTOR  
A system includes a motor, an inverter bridge, a voltage detection circuit, and a controller. The motor has a stator and a rotor. The inverter bridge is configured to provide a voltage to the...
US20140265959 MOTOR DRIVE DEVICE  
The present invention relates to a motor drive device having a drive circuit for driving a power supply relay and a phase relay providing a fail-safe function. The motor drive device includes: an...
US20140300303 SYSTEMS AND METHODS FOR ARC DETECTING AND EXTINGUISHING IN MOTORS  
A system and method for arc detecting and extinguishing in motors includes a power input interface to a power source; an output interface to a motorized load to deliver power to the motorized...
US20090211822 Method and Apparatus for Stall Detection  
Stall detection apparatus for an electric motor controller has an input for receiving a drive error flag indicating if the controller is unable to achieve the required motor velocity and an input...
US20150097502 Method For Estimating Motor Parameter In A Load Commutated Inverter Arrangement, And A Load Commutated Inverter Arrangement Therefor  
A method for estimating a motor parameter in a load commutated inverter arrangement, including the steps of: measuring a motor side ac-voltage; detecting commutation interval information of the...
US20140084825 METHOD FOR CHECKING OUT-OF-STEP OF SYNCHRONOUS MOTOR  
A method for checking an out-of-step of a synchronous motor includes detecting electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree...
US20130207582 METHOD FOR CONTROLLING AN INVERTER  
Provided is a method for controlling an inverter, the method comprising calculating an optimal speed, determining a final speed as the optimal speed when a command speed is higher than a rated...
US20110169437 ONE-PHASE ELECTRONICALLY COMMUTATED MOTOR  
An electronically commutated one-phase motor (20) has a stator having at least one winding strand (30, 32) and a permanent-magnet rotor (22). The rotor, as it rotates, induces a voltage (uind) in...
US20150200614 MAGNET TEMPERATURE ESTIMATING SYSTEM FOR SYNCHRONOUS ELECTRIC MOTOR  
A magnet temperature estimating system for a synchronous electric motor having a permanent magnet includes: a superimposing unit configured to superimpose a voltage or current of a frequency...
US20150054431 CONTROL DEVICE OF AC MOTOR  
A control device of a three-phase AC motor includes: an inverter that drives the AC motor; a current sensor that senses a current flowing in a sensor phase of the AC motor as a sensor phase...
US20120313564 RECONFIGURABLE INVERTER HAVING FAILURE TOLERANCE FOR POWERING A SYNCHRONOUS POLY-PHASE MOTOR HAVING PERMANENT MAGNETS, AND ASSEMBLY INCLUDING SAID INVERTER AND MOTOR  
Reconfigurable fault-tolerant inverter for powering a multi-phase synchronous permanent-magnet motor, and assembly of the said inverter and motor. The inverter includes: N switching cells (B1, B2,...
US20130220726 MOTOR DRIVE APPARATUS  
A power transducer failure detection device detects a failure on a power transducer, making a power transducer control device stop driving the power transducer. A first switching control device...
US20120074878 METHOD AND SYSTEM FOR PREVENTION OF MOTOR REVERSAL  
A power tool includes a brushless DC motor housed inside a tool housing, an input unit, and a control unit. The motor includes a rotor, a stator, and at least one sensor positioned to sense a...
US20120019181 Power converter for rotating electric machine  
A power converter for converting power supplied to a rotating electric machine that includes windings of N-phase (N≧2), includes an inverter section, a voltage detecting portion, one or more...
US20120133312 METHODS AND SYSTEMS FOR AUTOMATIC ROTATION DIRECTION DETERMINATION OF ELECTRONICALLY COMMUTATED MOTOR  
A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower...
US20110285334 METHOD FOR OPERATING A BRUSHLESS MOTOR  
The present invention relates to a method for operating a brushless electric motor whose windings are driven by an inverter with the aid of six switches, having an identification unit being...
US20110266984 POWER DRIVE CONTROL DEVICE AND POWER DEVICE  
A power drive control device is provided, in which, even if drive of a synchronous motor becomes impossible due to abnormalities of a control circuit for controlling the synchronous motor, it is...
US20140346986 PARALLEL HARNESS CURRENT IMBALANCE AND FAILURE DETECTION  
Current imbalance may be detected in a 3-phase power system by monitoring current output between two points of a phase signal provided along wire pairs from an inverter to a motor. In some...
US20150054439 METHOD AND DEVICE FOR OPERATING AN ELECTRONICALLY COMMUTATED ELECTRICAL MACHINE IN THE EVENT OF A FAULT  
The invention relates to a method for operating a multiphase electrical machine (2) in the event of a fault, wherein the electrical machine (2) is driven with the aid of a driver circuit (3),...
US20110193506 MOTOR DRIVER AND METHOD OF CONTROLLING THE SAME  
A controller controls switching of IGBT devices of an inverter according to the desired output of the permanent magnet motor. The controller includes: a magnet temperature detection device that...
US20130271050 MULTI-PHASE BRUSHLESS DC MOTOR CONTROL INTEGRATED CIRCUIT HAVING MAGNETIC SENSOR AND BAND-GAP TEMPERATURE SENSOR FORMED THEREON  
An integrated circuit for implementing brushless DC motor control includes a substrate, a band gap temperature sensor, and a magnetic sensor. The substrate has a temperature output pin for...
US20130106331 MOTOR OPERATION FAILURE DETECTION  
Systems and methods of detecting a failure of a permanent magnet synchronous motor system. A current of each phase coil of the motor is monitored. A value indicative of the power of the motor is...
US20150054432 CONTROL DEVICE OF AC MOTOR  
A control device of a three-phase AC motor includes: an inverter for driving the motor; a current sensor for sensing a sensor phase current of the motor; and a controller for controlling the...
US20110181217 METHOD AND DEVICE FOR ASCERTAINING THE ROTOR TEMPERATURE OF A PERMANENT-MAGNET SYNCHRONOUS MACHINE  
A method for ascertaining the rotor temperature of a permanent-magnet synchronous machine (10), in which a first estimate (TR1) for the rotor temperature is ascertained as a function of a remanent...
US20090322267 MOTOR CONTROLLER WITH HALL SENSOR OUTPUT MISALIGNMENT COMPENSATION USING DELAYED OR SHIFTED COMMUTATION  
In a normal operating mode, a motor controller provides motor drive current to windings of a motor based on sensor signals to drive the windings in a normal commutation sequence, and monitors for...
US20080211439 DRIVE DEVICE FOR A BRUSHLESS MOTOR  
A drive device for a brushless motor executes an abnormality diagnosis (disconnection/short-circuit) of a motor side circuit. In detecting abnormality of the motor side circuit, the drive device...
US20090302792 AC rotating machine with improved drive for its stator coil  
In an AC rotating machine, a stator is provided with N-phase stator windings and located relative to the rotor. The N is an integer equal to or greater than 3, and the N-phase stator windings are...
US20150130380 MOTOR CONTROL DEVICE  
A ripple current that flows into a main-circuit capacitor is estimated based on a system impedance and output power to a motor, thereby making it possible to always perform ripple-current...
US20120161681 MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING EQUIPMENT HAVING THE SAME  
A motor control device detecting short-circuit and disconnection faults of a power relay includes: a drive circuit of a motor; the power relay having first and second switching elements; a...
US20130207581 DRIVING CONTROL DEVICE OF BRUSHLESS MOTOR  
A driving control device of a brushless motor includes an inverter circuit having: first arm-side switching elements that are connected between respective phases of respective armature coils of...
US20130063062 ELECTRIC POWER STEERING SYSTEM  
An electric power steering system includes short-circuit determination means for determining whether a short-circuit between an energization failure phase and one of the two phases other than the...
US20100001669 Error recognition by evaluation of parameters of the field oriented regulation  
A drive device having an electric motor with a device for field oriented control of the electric motor and a method for operation thereof is disclosed. An error monitoring of a transducer on the...
US20130141025 MOTOR DRIVE CIRCUIT  
A motor-drive circuit includes a detection circuit to detect a reverse current to flow in a direction from a first sink-side transistor to a second source-side transistor or in a direction from a...
US20130320894 PROTECTION CIRCUIT FOR A D.C. BRUSHLESS MOTOR PUMP  
A protection circuit for a D.C. brushless motor pump in the present invention is to be installed on a driving circuit. The driving circuit is installed on a motor of the D.C. brushless motor pump....
US20130043815 PROTECTION CIRCUIT FOR A D.C. BRUSHLESS MOTOR PUMP  
A protection circuit 30 for a D.C. brushless motor pump in the present invention is to be installed on or connected to a driving circuit 40. The driving circuit 40 is installed on a motor 100 of...
US20120187878 METHOD FOR DETECTING DETERIORATION OF PERMANENT MAGNET IN ELECTRIC MOTOR AND SYSTEM FOR THE METHOD  
A method for detecting deterioration of a permanent magnet in an electric motor is characterized by peak current measuring steps and a determination step. In the first peak current measuring step,...
US20090088294 THERMAL PROTECTION OF AN ELECTRIC DRIVE SYSTEM  
Temperature of an electric drive is regulated to prevent undesirable thermal effects. Temperature conditions of the electric drive system are monitored and torque of the electric drive system is...
US20090134825 Static switch for motors of climate control units and climate control unit comprising the switch  
A static switch for DC motors of climate control units, comprising a signal side and a power side, which are mutually separated by means of optoisolators, the side comprising in input at least one...

Matches 1 - 50 out of 194 1 2 3 4 >