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9041335 Driver circuit and driving method  
A driver circuit for driving an electrical load includes an input terminal pole connecting the driver circuit to an AC voltage source, an output terminal pole connecting the driver circuit to the...
9041402 Detecting an abnormality of a switch in a high voltage electrical substation  
There is provided a method for determining an abnormality during operation of a high voltage disconnect switch, the method comprising: determining a current position of an arm of the high voltage...
8988026 Single phase operation of a three-phase drive system  
Single-phase voltage operation techniques are provided for a three-phase drive system. A drive system may include a rectifier configured to couple to a three-phase AC voltage source. The rectifier...
8975847 Power conversion device  
A power conversion device includes a first capacitor connected in parallel to a direct-current power supply, plural power converters that drive plural synchronous machines, a second capacitor...
8947038 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...
8884567 Apparatus for carrying out improved control of rotary machine  
In a system for controlling a rotary machine, a circuit outputs an AC voltage to be applied to a rotary machine. A storage stores therein measurement-error information indicative of a measurement...
8878482 Power converting apparatus  
A power converting apparatus includes a timing signal generator and a phase determination signal generator provided in an ON/OFF signal generating unit as well as a detected current correction...
8860341 Power regeneration device and power conversion device  
A power regeneration device according to an aspect of embodiments includes a voltage detecting unit, a signal processing unit, a phase detecting unit, and a power conversion unit. The signal...
8847539 Servomotor drive device that drives servomotor connected to rotating shaft  
A servomotor drive device has a first converter, a regenerative resistor circuit having a first switching element and a regenerative resistor, a first connection part configured to connect a...
8823332 Fault tolerant electric drive system  
A fault tolerant electric drive system includes an alternator, a motor controller and an electric motor, wherein the alternator and motor each have a plurality of corresponding independent phase...
8779703 Method for operating a polyphase machine having a pulse-width-modulated inverter  
A method for operating a polyphase machine having a pulse-width-modulated inverter includes: determining a setpoint current value respectively for a current in the longitudinal direction and/or...
8749192 Electric motor and electric generator  
An electric motor comprising a stator having two coil sets arranged to produce a magnetic field of the motor, each coil set comprising a plurality of coil sub-sets; and two control devices,...
8558490 Estimation of actual torque in an electrical motor drive  
It is presented a control device for driving an electric motor, wherein a drive control signal for the electric motor is arranged to be determined using a calculated rotor flux. A direct...
8410744 Motor driving apparatus  
During motor acceleration control period that starts at time T1, if power supply output or supply current exceeds a predetermined level at time T2, PWM control in a PWM converter is turned off...
8405344 Method and apparatus for estimating a rotation speed of an electric motor  
A method is disclosed for estimating a rotation speed of an electric motor supplied by an inverter, by determining a time derivative of a stator current vector of the electric motor during a zero...
8400100 Electric power converter  
An electric power converter includes a DC to DC converter section adjusting DC power of a battery with at least two units in series, a DC circuit having at least two DC link capacitors in series...
8369049 Method for shutting down an electric machine in the event of a malfunction  
A method for shutting down an electric machine having a pulse-controlled inverter in the event of a malfunction. Undesirable side effects during shut-down of the electric machine may be minimized...
8350518 Control apparatus for matrix converter  
A control apparatus for a series-connected multi-level matrix converter includes each voltage commanding device provided for each of single-phase matrix converters to generate a voltage reference...
8283885 Driver circuit  
A drive control signal is effectively obtained. An offset control circuit (32) adds an offset to a rotational state signal. An added signal is obtained by adding an offset to the rotational state...
8269450 Winding switching apparatus and winding switching system  
A winding switching apparatus includes a winding switching device and a drive circuit. The winding switching device is configured to switch a plurality of windings of an AC motor. The drive...
8264190 Control apparatus for multi-phase rotary machine and electric power steering system  
A control apparatus for a multi-phase rotary machine includes a control unit and a plurality of power supply systems including respective inverter units. When a short-circuiting failure occurs in...
8242726 Method and circuit arrangement for the feedback of commutation energy in three-phase current drive systems with a current intermediate circuit converter  
There is disclosed a method and a circuit arrangement for the feedback of commutation energy in three-phase current drive systems with a current intermediate circuit converter. Commutation energy...
8242722 Controller for rotating electrical machines  
A controller for rotating electrical machines comprises a processing unit, to which a plurality of parameters are input, for generating a switching instruction to control a switching operation of...
8228021 Converter circuit  
A converter circuit includes a phase circuit having a switch module, a first winding, a first diode, a second winding, and a second diode. The second winding is inductively coupled to the first...
8183816 Method for field-oriented operation to zero speed of an encoder-less asynchronous machine  
In a method for field-oriented operation to zero speed of an encoder-less asynchronous machine, wherein the associated field-oriented regulation device has a monitor with a machine model and...
8159177 System for realizing rotor variable frequency speed control asynchronously and simultaneously by driving multiple motors via one inverter  
A system for realizing rotor variable frequency speed control asynchronously and simultaneously is disclosed. Multiple motors are driven via one inverter, which consists of a motor group, a...
8138710 Power drive of electric motor  
Some embodiment of the present disclosure provide an electric motor comprising a power drive configured to supply electric power to different components of the motor that operate with different...
8120306 Voltage source inverter with a voltage offset  
Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage...
8115444 Common mode filter for motor controllers  
A motor drive circuit has a converter for coupling to an AC voltage source and an inverter coupled to the converter for providing a drive current for a motor. A common mode circulation loop is...
8086363 Drive control device for vehicle, and vehicle  
A vehicle is mounted with a drive device provided with a plurality of rotating electrical machines, and a drive unit driving the plurality of rotating electrical machines. A drive control device...
8054014 Control system for an electrical machine  
In a control system and a method for operating a permanent-magnet electrical machine, when the electrical machine is switched off after one of a functional computer and a monitoring computer of...
8044632 Power conversion device  
A power conversion device includes a converter that converts AC power to DC power, a converter controller that controls an output voltage of the converter, an inverter that converts the DC power...
7990093 Electric motor control apparatus  
A control apparatus for a multiphase AC electric motor having an inverter includes a current control including an abnormal-state current controller; an abnormal-state detector that detects an...
7969039 Method of controlling fuel cell vehicle and method of controlling DC/DC converter apparatus  
A controller is capable of executing direct couple control that directly couples a first power device and a second power device without causing a DC/DC converter to convert voltage. During the...
7960939 Fuel/electric drive system  
A fuel/electric drive system having an internal combustion engine is disclosed, having a generator which is driven by the internal combustion engine and has a first stator winding set, having a...
7915853 Motor driving apparatus  
A system for driving a motor includes first and second rectifier circuits, a direct current (DC) link circuit, an inverter circuit, a voltage booster circuit, and a switch control circuit. When...
7906933 Apparatus and method for driving an induction motor  
An induction motor drive includes a plurality of inverters, a changeover switch which changes over outputs of the plurality of inverters to be supplied to one induction motor and a changeover...
7898209 Cleaner and method for driving the same  
A cleaner that can automatically respond to a change in an AC voltage and a voltage of a battery. In the motor, a motor for rotating a collecting fan is driven by a motor driver. The motor driver...
7863854 Heat-exchange cooling device and power supply circuit driver used therefore  
A heat exchange cooler capable of eliminating continuous radiation of high-frequency noise waves and reducing the man hour for the installation work, and a power circuit driving device used for it...
7855901 AC voltage output apparatus and hybrid vehicle including the same  
An AC command voltage obtained by compensating a reference value of a commercial AC voltage output from a multiplication unit using an FB control unit is multiplied by k (0≦k≦1) by a...
7852022 Control apparatus for electric car  
A control apparatus for an electric car, including a power converter which feeds AC power of variable voltage and variable frequency to a primary side member of a linear electromagnetic actuator,...
7847511 Cleaner and method for driving the same  
A cleaner that can have the sufficient capability of collecting pollutant particles by a battery voltage as well as a AC voltage. The cleaner uses a switched reluctance motor to rotate a...
7835630 Adaptive and reconfigurable system for DC motor control  
An integrated circuit for controlling a DC motor is disclosed. The integrated circuit includes at least one digital position and speed circuit (DPS) for providing measurements of speed, position,...
7782009 Adjustable speed drive protection  
A protection scheme to protect pulse width modulated drives is described. The scheme is implantable in both hardware and software and combinations thereof. The semiconductor devices of the drive...
7764041 System and method to extend synchronous operation of an active converter in a variable speed drive  
Systems and methods for synchronous operation of variable speed drives having active converters include extending the synchronous operation of an active converter to the AC mains voltage during...
7746038 System and method for suppressing DC link voltage buildup due to generator armature reaction  
A controller employed in conjunction with a synchronous generator monitors the output voltage of the generator. The controller employs the monitored output voltage as feedback that is used to...
7728544 System and method for controlling input line harmonics in a motor drive  
A motor drive system is disclosed that includes a power input configured to receive alternating current (AC) power and a rectifier having a switching frequency selected to convert the AC power to...
7710064 Semiconductor device for motor driving and motor having the same, motor driving apparatus and air conditioner  
A motor driving semiconductor device has: six switching elements for driving a three-phase motor; three output terminals for applying output voltages to three terminals of coils of the three-phase...
7671557 Phase current detection method, inverter control method, motor control method and apparatus for carrying out these methods  
Apparatus and methods for phase current detection used for driving a motor by supplying outputs from a pulse width modulation (PWM) converter to the motor. One method presented provides detecting...
7661274 System and method for capacity control in a multiple compressor chiller system  
A capacity control algorithm for a multiple compressor liquid chiller system is provided wherein the speed and number of compressors in operation are controlled in order to obtain a leaving liquid...

Matches 1 - 50 out of 356 1 2 3 4 5 6 7 8 >