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US20150145453 POWER CONVERTING CIRCUIT  
A power conversion circuit for supplying power to an inductive load, includes a switching circuit and an energy saving circuit. The inductive load is supplied with electrical power and the energy...
US20150145452 POWER CONVERTING CIRCUIT  
A power converting circuit for supplying power to an inductive load, includes an inductance, a switching circuit and an energy saving circuit. The inductance is charged when the switching circuit...
US20130234637 ELECTRIC WIRE, COIL, DEVICE FOR DESIGNING ELECTRIC WIRE, AND ELECTRIC MOTOR  
An electric wire includes a conductive portion 11 made of a material having a volume resistivity higher than that of copper, wherein the volume resistivity of the conductive portion is specified...
US20140260410 METHODS AND SYSTEMS FOR CONTROLLING POWER TO AN ELECTRIC MOTOR  
Methods and systems for controlling an electric motor are provided herein. The system is configured to be coupled to a power supply. The electric motor system includes a rectifier, an electric...
US20130009581 Motor Converter Circuit for an Electric Drive Motor and Electric Drive Device Having Such a Motor Converter Circuit  
An electric drive device (1) comprises a motor converter circuit (3) according to the invention, which includes an intermediate circuit capacitor (16). The intermediate circuit capacitor (16)...
US20140001993 Electric Power Tool  
An electric power tool includes: a brushless motor having a plurality of stator windings and configured to rotate in accordance with voltages applied to the plurality of stator windings, an...
US20130162187 Method and Motor Driving Circuit for Adjusting Rotational Speed of Motor  
A method for adjusting rotational speed of a motor is also disclosed. The method includes determining whether an input voltage of the motor enters into a predetermined voltage range; generating a...
US20110273124 LOW COST BLENDER CONTROL PERMITTING LOW ACTUATION FORCE SWITCHES  
A control circuit for a blender provides low-cost power conditioning through the use of a high resistance which provides temporary power for operation of low-voltage logic circuitry and...
US20110273123 POWER SUPPLY SYSTEM AND METHOD FOR CONTROLLING A MECHANICALLY COMMUTATED ELECTRIC MOTOR  
The invention relates to a method for providing a trigger signal in response to the commutation of a mechanically commutated electric motor (1). The method comprising the steps of providing a...
US20150244294 DC ELECTRIC FAN AND DRIVING SYSTEM THEREOF  
A DC electric fan receiving a first direct current voltage is provided. The DC electric fan includes a motor, a fan blade, a voltage converting device and a motor controller. The motor is directly...
US20140035498 MOTOR FOR A SYNCHRONOUS ELECTRIC MACHINE AND METHOD FOR ROUTING POWER  
A motor for a synchronous electric machine includes a first inverter configured to provide alternating current power at a first plurality of phases. Also included is a second inverter configured...
US20120126734 ALTERNATING CURRENT CHOPPER CIRCUIT WITH LOW NOISE  
An alternating current chopper circuit with low noise is disclosed. The circuit includes a switching circuit, a first freewheel circuit, and a second freewheel circuit. The switching circuit has a...
US20120299516 PERMANENT MAGNET MOTOR SYSTEM  
A sensorless permanent magnet motor system that prevents negative torque caused by back EMF. The system determines the position of the rotating permanent magnet by monitoring back EMF generated on...
US20140225546 MOTOR DRIVE METHOD AND MOTOR DRIVE DEVICE  
A motor drive method of the invention is to drive a brushless motor having a rotor, a stator, and a hall element used as a position detecting sensor. While driving the brushless motor, when...
US20140320049 AC MOTOR  
An embodiment of the invention provides an AC motor that is driven by an AC voltage. The AC motor includes a motor coil, a switch circuit, a position detector and a controller. The motor coil...
US20120286711 AC MOTOR  
An embodiment of the invention provides an AC motor that is driven by an AC voltage. The AC motor includes a motor coil, a switch circuit, a position detector and a controller. The motor coil...
US20130200829 POWER SUPPLY APPARATUS OF HOME APPLIANCE  
A power supply apparatus of a home appliance which meets standby power regulation of 0.5 watts using one SMPS. As compared with a general circuit which meets the standby power regulation using two...
US20120286712 MOTOR DRIVE APPARATUS  
In a motor drive apparatus for driving a three-phase AC motor, a first mounting part of a heat sink is formed along an end. A second mounting part is formed in a direction perpendicular to the...
US20120024552 Inverter Device and Electrical Power Tool  
An electrical power tool includes a motor, a load detecting unit, a trigger switch, and a power supplying unit. The load detecting unit detects a load applied to the motor. The trigger switch...
US20110025245 ELECTRIC MOTOR WITH POWER SUPPLY CIRCUIT SUPPLYING ISOLATED ELECTRIC POWER  
Circuitry for controlling motors, such as a brushless motor (BLM), is disclosed. The circuitry may comprise one or more inputs for receiving rotor position signals from one or more Hall effect...
US20110057592 POWER TRANSISTOR CIRCUIT  
A power transistor has a first current electrode coupled to a first power supply terminal and a second current electrode as an output of the circuit. A driver control circuit is coupled between a...
US20120081052 POWER SUPPLY CIRCUIT  
A power supply circuit includes two half bridge circuits, a controller and two terminals for connecting a motor. The controller includes a signal input terminal, a phase inverter, a wiring board...
US20130033211 SWITCHING-MODE POWER SUPPLIES AND CONTROL METHODS THEREOF  
Disclosed include switching-mode power supplies and control methods thereof. A disclosed switching-mode power supply is coupled to an input power node and a ground node, comprising a controller, a...
US20130285585 POWER INVERTER SUITABLE FOR A VEHICLE  
A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board...
US20150137722 DC Voltage Detector and Power Converter Using the Same  
In a thyristor control device which converts a first AC voltage to a DC voltage and converts the DC voltage to a second AC voltage to be supplied to a synchronous motor, a DC voltage detector is...
US20120049775 MOTOR DRIVE CIRCUIT  
A motor drive circuit configured to supply drive currents to drive coils with a plurality of phases of a motor to drive the motor, includes: a trapezoidal wave signal generation circuit configured...
US20150008856 MULTI-LEVEL MEDIUM-VOLTAGE INVERTER  
A multi-level medium-voltage inverter that receives three-phase power and outputs a three-phase voltage to a three-phase motor, includes: a plurality of unit power cells connected in series to...
US20150214881 DEVICE AND METHOD FOR CONTROLLING ELECTRIC MOTOR  
A device for controlling an electric motor is provided. The device includes: an inverter supplying a current to an electric motor; a current sensor sensing a current supplied from the inverter to...
US20140265965 DRIVE CONTROL DEVICE AND DRIVE CONTROL METHOD FOR MOTOR  
The present invention provides a motor drive control device provided with a shutoff circuit employing semiconductor relays and configured to drive a motor by a duty ratio control of an inverter,...
US20110204834 MOTOR DRIVING CIRCUIT  
A motor-driving circuit includes: a plurality of output transistors; a first-comparator circuit to compare a voltage of each phase of driving coils of a plurality of phases in a motor, with a...
US20120126733 HIGH POWER-DENSITY, HIGH BACK EMF PERMANENT MAGNET MACHINE AND METHOD OF MAKING SAME  
An electric drive system includes a permanent magnet machine having a rotor and a stator and a power converter electrically coupled to the permanent magnet machine and configured to convert a DC...
US20110031916 Inverter Circuit with IPM Module for Brushless Motor  
An inverter circuit for a brushless motor utilizes an IPM integrated circuit module. The module includes insulated gate bipolar transistors and has outputs for providing driving signals to the...
US20090115363 Electronic Commutator Circuits  
The electronic commutator circuits provide forced commutation enhancements that can be embedded within a known electronic commutator to overcome its low speed torque limitation. The forced...
US20140346989 INVERTER CONTROLLER AND METHOD OF CONTROLLING AN INVERTER  
A method of controlling a switching frequency of an inverter, the method comprising the steps of: measuring a signal indicative of a temperature variable at a first switching frequency to...
US20080116829 Efficient AC circuit for motor with like number of poles and magnets  
Simple AC circuitry driving a brush-less motor having a rotor consisting of alternate polarity permanent magnets poles, with the rotor journaled in a stator with a like number of wound poles...
US20150061558 ELECTRIC COMPRESSOR  
An electric compressor capable of discharging electric charges of a capacitor is provided. The electric compressor includes: a compressing unit; an electric motor for rotating the compressing...
US20120235613 BACKUP POWER FOR OVERVOLTAGE PROTECTION FOR ELECTRIC VEHICLE  
In a first aspect, the invention is directed to a circuit for powering a gate drive for an electric motor for a vehicle with an electric motor. The circuit provides a primary power supply and a...
US20130264980 THREE-PHASE INVERTER FOR DRIVING AN ELECTRIC MOTOR  
A three-phase inverter for driving a three-phase electric motor includes three half-bridges. Each half-bridge has a first and a second transistor. A first and a second control voltage are...
US20150214876 POWER CONVERSION DEVICE AND METHOD OF CONTROLLING THE SAME  
A power conversion device includes an inverter which can convert between DC and AC power by turning on and off bridge-connected semiconductor switching elements with free wheel diodes connected in...
US20120306416 BRUSHLESS MOTOR DRIVE DEVICE AND DRIVE METHOD  
The invention relates to a brushless motor drive device that performs switching determination of energization modes of a three-phase brushless motor according to a sensorless method, and a drive...
US20100141189 POWER SUPPLY WITH TWO SERIES INVERTERS FOR A POLYPHASE ELECTROMECHANICAL ACTUATOR  
The invention relates to a power supply having two inverters (A, B) in series for powering an electromechanical actuator having an electric motor including a plurality of windings (R1, R2, R3)...
US20140203745 MOTOR CONTROL CIRCUIT  
In a motor control circuit, a switching element such as an FET for controlling a motor current and a current detection element for detecting the motor current are connected in series. One terminal...
US20080143284 Two-Phase Permanent Magnet Motor  
The invention relates to a two-phase permanent magnet motor which is controlled by a frequency converter. The frequency converter is advantageously provided with a three-phase inverter having six...
US20140225545 SYSTEMS AND METHODS FOR CONTROLLING ELECTRIC MACHINES  
A motor controller is provided that includes an inverter configured to drive an electric motor, a rectifier configured to rectify an alternating current (AC) input current and to output the...
US20130009580 METHOD AND DEVICE FOR CONTROLLING A POLYPHASE ELECTRICAL MACHINE  
A polyphase electrical machine controlled by at least two parallel inverters, each including a number of branches equal to a number of phases of the machine and controlled by PWM. When detecting...
US20130154531 AC MOTOR DRIVING APPARATUS  
In the case where DC power from a DC power supply is converted to AC power by an inverter and supplied to an AC motor, a power compensator is connected in parallel with a DC power input portion of...
US20130258515 MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPLIANCE  
A motor drive device has a driver circuit generating an output current for a motor and a control circuit controlling the drive circuit. The control circuit, when switching the driver circuit from...
US20130241444 Multi Output Inverter  
The present invention relates to a multi output inverter that is adapted to supply mains powered appliances 47-49 and/or poly-phase motors 50, 51. The inverter is also adapted to reduce ripple...
US20100320949 Multi Output Inverter  
The present invention relates to a multi output inverter that is adapted to supply mains powered appliances (47-49) and/or poly-phase motors (50, 51). The inverter is also adapted to reduce ripple...
US20140021279 HEAVY DUTY MILL  
In a drive arrangement for a heavy duty mill an electric motor with a high number of magnetic poles and a stator that is segmented into at least four stator segments is used. By providing one,...

Matches 1 - 50 out of 206 1 2 3 4 5 >