Matches 1 - 50 out of 114 1 2 3 >


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US20150256111 CYCLE-BY-CYCLE CURRENT LIMIT FOR POWER TOOLS HAVING A BRUSHLESS MOTOR  
A handheld AC power tool is provided. The power tool is comprised generally of: a brushless DC motor; a power cord connectable to an AC power socket; a converter circuit configured to receive...
US20140055066 BRUSHLESS MOTOR CONTROL DEVICE AND BRUSHLESS MOTOR CONTROL METHOD  
After a rotor of a three-phase brushless motor is previously moved by a simple control method to a predetermined rotary position, a motor is started-up. A brushless motor control device (10) moves...
US20110234134 PM BRUSHLESS MOTOR DRIVE CIRCUIT TOPOLOGY AND CONTROL  
An inverter for a permanent magnet brushless do machine, having a permanent magnet rotor and a set of stator windings, applies the full dc voltage provided to the inverter to each phase of the...
US20120074886 BRUSHLESS MOTOR DRIVING CIRCUIT  
A brushless motor driving circuit includes a battery for supplying a power to the brushless motor driving circuit; a driver circuit; a bridge circuit including a plurality of N-channel FETs; a...
US20130038258 MOTOR CONTROL DEVICE  
A power supplied by an AC power supply is used as an input to a rectifying circuit, and an output of the rectifying circuit is used as an input to a smoothing capacitor having a capacitance of...
US20130119907 Power Module with Current Routing  
According to an exemplary embodiment, a bondwireless power module includes a common output pad coupling an emitter/anode node of a high side device to a collector/cathode node of a low side...
US20120262100 Bondwireless Power Module with Three-Dimensional Current Routing  
According to an exemplary embodiment, a bondwireless power module includes a common output pad coupling an emitter/anode node of a high side device to a collector/cathode node of a low side...
US20110309779 VEHICULAR ELECTRICAL SYSTEM AND METHOD FOR CONTROLLING AN INVERTER DURING MOTOR DECELERATION  
Methods and systems for operating an inverter coupled to an electric motor are provided. The inverter has a plurality of high switches and a plurality of low switches coupled to the electric...
US20110031917 Motor drive circuit and a method for driving a motor  
A motor drive circuit includes an H-bridge circuit, voltage difference detection circuit, calibration circuit, back electromotive voltage detection circuit, control circuit, and calibration value...
US20130200830 MOTOR-DRIVING SYSTEM  
The invention includes a three-phase full-bridge power converter, a motor generator driven by the power converter, a pulse number generator which determines the number of pulses included in the...
US20150249406 Driving Device for Electric Motor  
The present invention relates to a driving device for an electric motor, including an inverter circuit and a power-supply relay disposed in a power-supply line of the inverter circuit, the...
US20080278102 ROTARY ELECTRIC SYSTEM DESIGNED TO UTILIZE ZERO-PHASE CIRCUIT  
In a rotary electric system, a rotary electric machine is provided with an armature core and star-connected multiphase windings with a neutral point wound in the armature core. Each of the...
US20130234638 POWER CONVERTER FOR DRIVING SWITCHED RELUCTANCE MOTOR  
An upper bridge of the power converter drives a half of phase windings. A lower bridge of the power converter drives the other half of the phase windings. For example, an upper neutral point of a...
US20110163706 DRIVE DEVICE FOR ELECTRIC POWER CONVERSION CIRCUIT  
A drive device has a break circuit. The break circuit inputs phase-current values transferred from phase-current sensors mounted on an electrical path of a motor generator. A power switching...
US20140139160 SWITCH DRIVING CIRCUIT  
A switch driving circuit has: a switch signal generator adapted to generate switch signals to complementarily turn on and off switches connected in parallel between a node to which an input...
US20110204835 SWITCHING CIRCUIT FOR SERIES CONFIGURATION OF IGBT TRANSISTORS  
A switching circuit includes two power transistors (22, 24) connected in series and a circuit (26, 28) for exciting each transistor suitable for simultaneously switching the two transistors. The...
US20130264984 Power Converting Apparatus  
Provided is a power converting apparatus which suppresses noise caused by a square wave voltage that is sharply changed according to switching of the power converting apparatus. The invention has...
US20140159630 CONVERTER FOR AN ELECTRICAL MACHINE AND METHOD FOR CONTROLLING A POWER CIRCUIT BREAKER  
The present invention specifies a converter for an electrical machine. A power circuit breaker (T1) comprises at least two semiconductor elements (9, 10) connected to one another to form said...
US20110241587 DIRECT-CURRENT TO THREE-PHASE ALTERNATING-CURRENT INVERTER SYSTEM  
A direct-current to three-phase alternating-current inverter system includes a three-phase motor, a plurality of switching elements, an inverter circuit for the three-phase motor, a capacitor, a...
US20120235614 PARALLEL POWER INVERTER MOTOR DRIVE SYSTEM  
Multiple inverter motor drives are interconnected in parallel to provide a common output to a motor. Common control circuitry is coupled to all parallel drives via optical cables and provides...
US20140265967 Sine Modified Trapezoidal Drive for Brushless DC Motors  
A pulse width modulated (PWM) trapezoidal commutation drive to a brushless direct current (BLDC) motor is sine modified so that the applied drive voltage substantially matches the induced voltage...
US20150236624 CURRENT DETECTION CIRCUIT, MOTOR DRIVING DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPLIANCE  
A current detection circuit for detecting a maximum current value in a three-phase motor includes an identifier configured to identify a maximum current phase having the maximum current value...
US20110074326 ELECTRICAL MOTOR/GENERATOR DRIVE APPARATUS AND METHOD  
The present disclosure includes electrical motor/generator drive systems and methods that significantly reduce inverter direct-current (DC) bus ripple currents and thus the volume and cost of a...
US20110133679 TWO-PHASE BLDC MOTOR  
A two-phase BLDC motor comprises a stator and a rotor. The stator has a stator core and a two-phase winding wound on the stator core. The stator core comprises a plurality of teeth with slots...
US20140300992 MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC DEVICE  
A motor drive device has a spindle motor driver adapted to receive electric power from a power supply line to drive a spindle motor; an isolation switch adapted to connect and disconnect an...
US20140320050 POWER CONVERTER CIRCUIT  
A power converter circuit has at least two submodules connected in a series circuit and receiving electrical power from a power source outputting a DC voltage, via an inductance. Each submodule...
US20110175559 Motor Drive Based on III-Nitride Devices  
An inverter for driving a motor includes one or more power stages for producing one or more power signals for energizing the motor, each power stage including first and second III-nitride based...
US20140354201 SWITCHING CONTROLLER FOR ELECTRIC MOTORS AND RELATED METHOD OF CONTROLLING ELECTRIC MOTORS  
A switching controller of a poly-phase electric motor may generate, in a fully digital manner, a replica of the phase current and/or of the phase (star) voltage of one or more windings of the...
US20100127652 MOTOR DRIVING CIRCUIT  
A motor driving circuit includes a three-phase inverter circuit 8, including three upper-arm switching elements 56a to 56c for driving upper arms of different phases of a three-phase motor 3, and...
US20090284200 AC motor driving circuit and electric vehicle driving circuit  
In an AC motor driving circuit, a current source rectifier is provided on the output side of an AC generator and an AC motor is connected to the output side of the current source rectifier through...
US20090224711 ROTATING ELECTRICAL MACHINE WITH DECOUPLED PHASES  
A rotating electrical machine comprising an electromechanical group with n phases which is adapted in such a way as to convert electrical power into mechanical power, and a static converter...
US20060138981 Universal device for DC motor speed control  
There is provided a controller for a DC motor drive transistor which controls a parameter of a motor, the transistor being of PNP or NPN type, and the controller comprising a detection circuit,...
US20090128070 Brushless DC Motor with Reduced Current Ripple  
A commutation circuit for driving a brushless DC motor is controlled according to a commutation cycle composed of alternating primary steps and transitional steps. The commutation circuit includes...
US20090230907 Method and Circuit Arrangement for Continously Supplying Power to a Brushless Electric Motor  
The invention relates to a method for controlling a brushless electric motor comprising a plurality of winding branches (21, 22, 23) and a circuit arrangement (1) suitable therefor. The temporal...
US20120091935 METHOD AND APPARATUS TO DRIVE TWO-PHASE MOTORS FROM A THREE-PHASE BRIDGE  
A motor drive for driving two-phase motors using a three-phase bridge output stage, and a method of operating the drive. The driven two-phase motor can be a two-phase bipolar motor (such as a...
US20140103845 Reducing Current Reversal Time In Electric Motor Control  
The time required to reverse current flow in an electric motor is reduced by exploiting inductive current that persists in the motor when power is temporarily removed. Energy associated with this...
US20150108931 Method and Apparatus for Brushless DC Motor Control  
In one aspect of the teachings herein, an interface circuit obviates the need for a microcontroller with multi-channel PWM capability in the context of controlling a brushless, three-phase DC...
US20130264979 Controller for a Three-Phase Brushless D.C. Motor  
Controller for a three-phase brushless D.C. motor has a full bridge circuit and an electronic control unit (ECU). The full bridge circuit has three branches each with switches connected to the...
US20150084560 PHASE CURRENT DETECTION SYSTEM  
A motor control system includes an inverter and a plurality of current sensors each positioned in-line between the inverter and a phase coil of the motor. Each current sensor measures the current...
US20150214882 POWER CONVERSION DEVICE AND ELECTRIC POWER STEERING DEVICE USING THE SAME  
A power conversion device includes: an inverter that includes high potential side switching elements connected to a high potential side and low potential side switching elements connected to a low...
US20130278194 Power Inverter  
There is provided a power inverter that fixes a connector in which a DC-side connector and an AC-side connector are mechanically combined to a casing in which a power semiconductor module...
US20120032622 SINGLE POWER SUPPLY DUAL CONVERTER OPEN-WINDING MACHINE DRIVE  
An apparatus for improving machine drive performance. The apparatus includes a controller configured to control an impedance of a converter. The converter is configured to be electrically coupled...
US20090134734 Ac motor and control unit thereof  
The motor, which is an incorporated N-phased motor, comprises a rotor having four or more poles with N-poles and S-poles being alternately arranged in the circumferential direction, a stator...
US20100060245 RECTIFYING CIRCUIT FOR A MULTIPHASE ELECTRIC MACHINE  
Cathode-anode voltage across free-wheeling diodes in an active rectifier is used in the determination of switching points when the free-wheeling diode is forward biased. Hysteretic switching is...
US20070069677 System and method for applying energy to a motor  
A system for controlling a polyphase motor is described. The system comprises phase windings in the motor for energizing stators to cause rotational motion of a rotor of the motor as energy is...
US20120286710 CIRCUIT ARRANGEMENT AND METHOD AND DEVICE FOR OPERATING THE CIRCUIT ARRANGEMENT  
A circuit arrangement for an electrical machine having a plurality of stator windings, with each stator winding including at least a first winding phase and a second winding phase. The circuit...
US20100164419 Motor Driving Inverter Circuit Module, Motor Driving Apparatus Having the Motor Driving Inverter Circuit Module, and Inverter Integrated Circuit Package  
The motor driving inverter circuit module includes first-phase, second-phase, and third-phase high voltage drivers generating first-phase, second-phase, and third-phase upper arm and lower arm...
US20100237811 Six-Phase Firing Circuit For Brushless DC Controls  
A six-phase 12 step firing circuit for brushless DC controllers to independently distribute current in six motor stator windings of a six-phase brushless DC motor, the firing circuit receives hall...
US20130069573 MOTOR DRIVE CIRCUIT MODULE  
In the motor-driving circuit module, a first electrode surface of a first electrode and a third electrode surface of a third electrode are arranged so as to face each other and such that currents...
US20090236930 Motor and control unit thereof  
A motor includes: a rotor having permanent magnets in which N-poles and S-poles are alternately arranged in the circumferential direction; seven stator pole groups, each of which has a plurality...

Matches 1 - 50 out of 114 1 2 3 >