| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318400270 | Having both high-side and low-side switching elements for plural-phase motor | 88 |
| 20080278102 | 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 star-connected multiphase windings has a predetermined winding configuration that prevents, when a zero-phase current is supplied from a direct current power source to the star-connected multiphase windings via the neutral point, a zero-phase magnetic flux created in the armature core based on the zero-phase current flowing in each phase winding of the star-connected multiphase windings from being cancelled out by a zero-phase magnetic flux created in the armature core based on the zero-phase current flowing in another one phase winding of the star-connected multiphase windings. | 11-13-2008 |
| 20090174353 | Motor control device - A motor control device has a drive circuit that is respectively provided on arms of an inverter circuit supplying current to an AC motor, and that drives a switching element included on the arms; and a power source control circuit that performs a control of a power supply circuit for supplying power to the drive circuit. A low-voltage circuit area is provided including the power source control circuit. A high-voltage circuit area includes one drive circuit, wherein a plurality of the high-voltage circuit areas is disposed aligned on both sides of the low-voltage circuit area such that the low-voltage circuit area is provided therebetween and also disposed with a predetermined distance provided between the high-voltage circuit area and the low-voltage circuit area. A transformer serving as the power supply circuit respectively joins the low-voltage circuit area and the high-voltage circuit areas. | 07-09-2009 |
| 20090230907 | 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 ( | 09-17-2009 |
| 20090284200 | 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 a voltage source inverter. Along with this, one of terminals of each of a plurality of bidirectional switches is connected to its corresponding output terminal of the voltage source inverter, the other terminals of a plurality of the bidirectional switches are lumped together to be connected to one of terminals of a storage battery, and the other terminal of the storage battery is connected to one of DC input terminals of the voltage source inverter. This eliminates need for a large capacitor at a DC link and a reactor in a chopper which were previously necessary, by which the AC motor driving circuit is downsized. | 11-19-2009 |
| 20100127652 | MOTOR DRIVING CIRCUIT - A motor driving circuit includes a three-phase inverter circuit | 05-27-2010 |
| 20100141190 | DRIVING WITH INVERTERS WITH LOW SWITCHING LOSSES - The invention relates to converters (inverters, pulse or frequency converters) and to the driving of “magnetically active” operating means. An effective switching frequency of the converter is not to be reduced, but nevertheless a reduction in cooling requirements is to be achieved A noise level produced in the operating means is to be kept low as well. The invention proposes, for this purpose, a circuit arrangement for feeding the operating means (electrically operated machine (M)) having at least one winding (L | 06-10-2010 |
| 20100164419 | 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 driving signals in response to input signals for driving the first-phase, second-phase, and third-phase upper and lower arms and a first-phase, second-phase, and third-phase upper arm and lower arm transistors, generating first-phase, second-phase, and third-phase motor driving output signals in response to the first-phase, second-phase, and third-phase upper arm and lower arm driving signals of the first-phase, second-phase, and third-phase high voltage drivers. The first-phase, second-phase, and third-phase high voltage drivers and the first-phase, second-phase, and third-phase upper arm and lower arm transistors are respectively integrated into separate chips. | 07-01-2010 |
| 20100201296 | Brushless DC Electric Motor - The invention relates to electrical engineering and can be used, in particular, in electric drives of mechanisms used in dental equipment. A brushless DC electric motor comprises an electromechanical converter ( | 08-12-2010 |
| 20110012546 | POWER CONTROL CIRCUIT FOR HARD DISK DRIVE - A power control circuit for a hard disk drive (HDD) includes a first control circuit, a second control circuit, a first connector connected to a power supply, the first and second control circuits, and a second connector connected to the first control circuit and the HDD. The power supply outputs a first voltage signal and a second voltage signal to the first and second control circuits via the first connector. The first control circuit converts the first and second voltage signals into a form compatible with a timing sequence of the HDD receiving voltage signals, and outputs the first and second voltage signals to the HDD via the second connector. The second control circuit controls the first control circuit. | 01-20-2011 |
| 20110031917 | 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 acquisition circuit. The H-bridge circuit is connected to a DC motor. The voltage difference detection circuit outputs terminal voltage according to voltage difference occurring between both terminals of the DC motor. The calibration circuit outputs calibration voltage according to the resistance component. The back electromotive voltage detection circuit outputs voltage according to the difference between the terminal voltage and the calibration voltage, as detection voltage indicating back electromotive voltage. The control circuit drives the H-bridge circuit by pulse width modulation. The calibration circuit calibrates voltage drop occurring at the ON resistance of the low-side transistor using a calibration value that corresponds to the ratio between the resistance component and the ON resistance of the low-side transistor, and outputs calibration voltage which corresponds to the resistance component. | 02-10-2011 |
| 20110050138 | 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, wherein the first control device is coupled to the plurality of coil sub-sets for the first coil set and the second control device is coupled to the plurality of coil sub-sets for the second coil set and each control device is arranged to control current in the respective plurality of coil sub-sets to generate a magnetic field in each coil sub-set to have a substantially different magnetic phase to the other one or more coil sub-sets in the respective coil set; and wherein the first control device and the second control device are mounted adjacent to the stator. | 03-03-2011 |
| 20110074326 | 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 capacitor. The drive methodology is based on a segmented drive system that does not add switches or passive components but involves reconfiguring inverter switches and motor stator winding connections in a way that allows the formation of multiple, independent drive units and the use of simple alternated switching and optimized Pulse Width Modulation (PWM) schemes to eliminate or significantly reduce the capacitor ripple current. | 03-31-2011 |
| 20110121769 | MULTI-TASKING POWER PROCESSOR FOR A VEHICLE ELECTRIC SYSTEM - A multi-tasking power processor ( | 05-26-2011 |
| 20110133679 | 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 formed between adjacent teeth. The rotor rotor has a plurality of magnetic poles formed by at least one permanent magnet. The windings are received in corresponding slots in such a way that each winding spans multiple teeth and the direction of current flowing through the windings in any one slot at any one time is the same. | 06-09-2011 |
| 20110163706 | 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 element is equipped with a freewheel diode connected in parallel with each other. An inverter has pairs of the power switching elements. In each pair, the power switching element in a high voltage side and the power switching element in a low voltage side are connected in series. It is detected for the freewheel diode to be in a freewheel mode when a forward current flows in the freewheel diode. The break circuit detects the freewheel mode when the phase-current value is not less than a predetermined threshold value. The break circuit detects the freewheel mode where the current flows in the freewheel diode in an upper arm when the phase-current value is not more than the threshold current value. | 07-07-2011 |
| 20110175559 | 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 bi-directional switching devices connected in series between a DC voltage bus and ground. | 07-21-2011 |
| 20110181218 | SEMICONDUCTOR APPARATUS - A semiconductor apparatus includes: a first transistor; a second transistor having a higher withstand voltage than the first transistor, a source of the second transistor coupled to a drain of the first transistor, a gate of the second transistor coupled to a source of the first transistor; a third transistor having a higher withstand voltage than the first transistor and a drain of the third transistor coupled to a drain of the second transistor; and a comparator that compares a source voltage of the first transistor with a source voltage of the third transistor, and controls a gate voltage of the first transistor. | 07-28-2011 |
| 20110204835 | SWITCHING CIRCUIT FOR SERIES CONFIGURATION OF IGBT TRANSISTORS - A switching circuit includes two power transistors ( | 08-25-2011 |
| 20110215746 | SEMICONDUCTOR DEVICE - A semiconductor device according to the present invention is a semiconductor device which includes: a semiconductor element; a gate drive circuit; and a connection terminal unit, wherein the semiconductor element includes: a gate electrode pad; and first and second ohmic electrode pads, the connection terminal includes: a first ohmic electrode terminal connected to the first ohmic electrode pad; a second ohmic electrode terminal connected to the second ohmic electrode pad; a gate drive terminal connected to the first ohmic electrode pad; and a gate terminal connected to the gate electrode pad, an input terminal of the gate drive circuit is connected to the gate drive terminal, an output terminal of the gate drive circuit is connected to the gate terminal, and a potential of the first ohmic electrode pad corresponds to a reference potential of the gate drive circuit. | 09-08-2011 |
| 20110221370 | DISCHARGE CONTROL DEVICE FOR POWER CONVERSION SYSTEM - The discharge control device for a power conversion system performs discharge control to discharge a capacitor parallel-connected to the input side of the power conversion system including a plurality of pairs of high-side and low-side switching elements connected in series and each controlled by a drive unit, by turning on the high-side and low-side switching elements of one of the pairs at the same time. At this time, the discharge control device inhibits an ON command from being inputted to the drive units for the high-side and low side switching elements of the other pairs. | 09-15-2011 |
| 20110234134 | 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 machine. | 09-29-2011 |
| 20110241587 | 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 direct-current power source and a control circuit. The switching elements arranged in the inverter circuit serve as upper and lower arms for the respective three phases of the three-phase motor, respectively. The capacitor is connected in parallel to the respective pairs of the upper and lower arms. The direct-current power source is arranged between the neutral-point of the three-phase motor and the respective lower arms or the respective upper arms. The control circuit controls the switching elements such that at least the switching frequency of one pair of the switching elements for one phase through which the current having the greatest value flows is lower than the switching frequencies of the other pairs of the switching elements for the other phases. | 10-06-2011 |
| 20110285336 | Semiconductor module device and driving apparatus having the same - A controller has a control board, a power module and a power board. MOS transistors, inverter input terminals, coil terminals, inverter ground terminals, control terminals, a control power input terminal and a control ground terminal are integrally molded in a molded portion of a power module. Electrical connections between the power module and the control and power boards are made through the terminals provided in the molded portion. | 11-24-2011 |
| 20110309779 | 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 motor. An event indicative of deceleration of the electric motor is detected. The inverter is alternated between a first mode of operation and a second mode of operation during the deceleration of the electric motor. In the first mode of operation, each of the plurality of high switches is activated and each of the plurality of low switches is deactivated. In the second mode of operation, each of the plurality of low switches is activated and each of the plurality of high switches is deactivated. | 12-22-2011 |
| 20120032622 | 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 to a plurality of first ends of a plurality of windings of a machine. A plurality of second ends of the plurality of windings of the machine are configured to be electrically coupled to a power source. | 02-09-2012 |
| 20120038302 | ENGINE POWER SUPPLY CIRCUIT, AND FLIGHT CONTROL MEMBER PROVIDED WITH SUCH A CIRCUIT - A power supply circuit for an electric motor, the circuit comprising a plurality of inverter bridge arms, each having means for connection to a respective winding of the motor, each inverter bridge arm comprising in series a first insulated gate bipolar transistor and a junction field effect transistor that are connected to a controller, the circuit including a second insulated gate bipolar transistor connected in series with each field effect transistor and connected to the controller, and a damping resistor connected in parallel with the second bipolar transistor. An aircraft flight control member including a movable airfoil associated with at least one drive motor connected to such a power supply circuit. | 02-16-2012 |
| 20120074886 | 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 control unit for rotating a brushless motor by switching the bridge circuit through the driver circuit based on a rotor position detection signal; a floating voltage generator for applying a voltage to a first group of the FETs of the bridge circuit; and a converter which is powered from the battery. The converter has an output connected to an input of the floating voltage generator for the first group of the FETs of the bridge circuit and an input of the driver circuit for a second group of the FETs of the bridge circuit to dedicatedly supply a power to gates of the FETs, and the control unit is powered from the battery without using the converter. | 03-29-2012 |
| 20120091935 | 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 hybrid stepping motor). The drive can also be configured so that a single output stage can be used to drive either two-phase or three-phase motors, with or without a feedback sensor. A reference return is provided from one of the three half-bridge output stages with each of the motor phase windings connected between the reference return and one of the other half-bridge outputs. The switches of each half-bridge are modulated so that current can be controlled in each of the two motor phase windings. | 04-19-2012 |
| 20120126735 | DEAD-TIME GENERATING CIRCUIT AND MOTOR CONTROL APPARATUS - A dead-time generating circuit includes a constant current circuit; a current generating circuit generating a capacitor-charge current; and a control circuit receiving a dead time control signal and a comparator signal. The control circuit generates a dead time generating signal based on the dead time control signal and the comparator signal, and a charge/discharge signal based on the dead time generating signal. Charging or discharging of a capacitor is controlled by the capacitor-charge current in accordance with the charge/discharge signal. A voltage of the capacitor is compared with a threshold voltage in order to generate a comparator signal when the voltage of the capacitor exceeds the threshold voltage. The control circuit generates the charge/discharge signal for a duration starting from a time when the delay time has elapsed from the rise or fall timing of the dead time control signal until the control circuit receives the comparator signal. | 05-24-2012 |
| 20120169262 | SEMICONDUCTOR DEVICE, METHOD OF MANUFACTURING THE SAME, AND POWER MODULE - A semiconductor device includes an n-type drain layer, an n-type base layer provided on the n-type drain layer, a p-type base layer and an n-type source layer partially formed in surface layer portions of the n-type base layer and the p-type base layer, respectively, a gate insulation film formed on a surface of the p-type base layer between the n-type source layer and the n-type base layer, a gate electrode formed on the gate insulation film facing the p-type base layer across the gate insulation film, a p-type column layer formed within the n-type base layer to extend from the p-type base layer toward the n-type drain layer, a depletion layer alleviation region arranged between the p-type column layer and the n-type drain layer and including first baryons converted to donors, a source electrode connected to the n-type source layer, and a drain electrode connected to the n-type drain layer. | 07-05-2012 |
| 20120194111 | INVERTER UNIT - The two-phase modulation control inverter unit includes a plurality of switching devices, a shunt resistor and a controller. The switching devices drive a three-phase motor. The shunt resistor is connected between a direct-current power supply and the switching devices. The controller reads a voltage applied to the shunt resistor in a read cycle, computes command voltages based on the read voltage, and uses the command voltages and carrier signals to compute three control signals. The read cycle corresponds to two or more signal cycles of each carrier signal. Each control signal has a pulse for each signal cycle of the corresponding carrier signal. The controller integrates a plurality of pulses of each control signal in the read cycle into one or more pulses. The controller reads a voltage applied to the shunt resistor at the time of outputting of the integrated one or more pulses in the next read cycle. | 08-02-2012 |
| 20120217918 | INVERTER - An inverter, particularly for the energy supply of a three-phase motor ( | 08-30-2012 |
| 20120235614 | 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 signals to power layer circuitry of each inverter for generation, at the power layer, of timing for gate drive signals for the respective inverter power electronic switches. The resulting timing exhibits a high degree of synchronicity such that very little imbalance occurs in the outputs of the paralleled drives, resulting in very low circulating currents. | 09-20-2012 |
| 20120249032 | ELECTRIC VEHICLE CONTROL DEVICE - Disclosed herein are electric vehicle control device which can distribute the heat generated by the semiconductor devices in the DC/AC converter efficiently. Also disclosed herein are methods of converting DC to AC while keeping the heat value of the semiconductor devices stable. | 10-04-2012 |
| 20120256574 | POWER SEMICONDUCTOR MODULE, POWER CONVERTING APPARATUS AND RAILWAY CAR - A power semiconductor module applied to a power converting apparatus for a railway car includes an element pair formed by connecting an IGBT and an SiC-FWD in anti-parallel to each other and an element pair formed by connecting an Si-IGBT and an SiC-FWD in anti-parallel to each other. The element pair and the element pair are housed in one module and configured as a 2-in-1 module in a manner that the first element pair operates as a positive side arm of the power converting apparatus and the second element pair operates as a negative side arm of the power converting apparatus. The element pairs are formed such that a ratio of an occupied area of SiC-FWD chips to an occupied area of IGBT chips in the element pairs is equal to or higher than 15% and lower than 45%. | 10-11-2012 |
| 20120262100 | 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 device. The bondwireless power module also includes a high side conductive clip connecting a collector of the high side device to a cathode of the high side device, and causing current to traverse through the high side conductive clip to another high side conductive clip in another power module. The bondwireless power module further includes a low side conductive clip connecting an emitter of the low side device to an anode of the low side device, and causing current to traverse through the low side conductive clip to another low side conductive clip in the another power module. The bondwireless power module can be a motor drive inverter module. | 10-18-2012 |
| 20120326646 | POWER SEMICONDUCTOR MODULE, POWER CONVERTING APPARATUS, AND RAILWAY CAR - A power semiconductor module includes an element pair formed by connecting, in anti-parallel to each other, an IGBT and an FWD group in which an FWD, a voltage drop characteristic of which during conduction has a negative temperature coefficient, and an FED, a voltage drop characteristic of which during conduction has a positive temperature coefficient, are connected in series and an element pair formed by connecting, in anti-parallel to each other, an IGBT and an FWD group in which a FWD, a voltage drop characteristic of which during conduction has a negative temperature coefficient, and an FWD, a voltage drop characteristic of which during conduction has a positive temperature coefficient, are connected in series. The element pairs are connected in parallel. | 12-27-2012 |
| 20130038258 | 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 about 1/100 of the capacitance of conventionally used capacitance. The capacitor is provided between a positive electrode node and a negative electrode node located between bus lines of output of rectifying circuit. Diodes constituting a rectifying circuit are connected respectively with phase outputs of an inverter. The rectifying circuit is connected to the negative electrode node through a capacitor. The rectifying circuit is connected such that an electric current flows only in the direction from an output of the inverter to the capacitor. The load is connected in parallel with capacitor. | 02-14-2013 |
| 20130069573 | 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 flow in opposite directions in the first electrode and the third electrode when a current flows through the first electrode. Additionally, a second electrode surface of a second electrode and the third electrode surface of the third electrode are arranged so as to face each other and such that currents flow in opposite directions in the second electrode and the third electrode when a current flows through the second electrode. | 03-21-2013 |
| 20130119907 | 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 device. The bondwireless power module also includes a high side conductive clip connecting a collector of the high side device to a cathode of the high side device, and causing current to traverse through the high side conductive clip to another high side conductive clip in another power module. The bondwireless power module further includes a low side conductive clip connecting an emitter of the low side device to an anode of the low side device, and causing current to traverse through the low side conductive clip to another low side conductive clip in the another power module. The bondwireless power module can be a motor drive inverter module. | 05-16-2013 |
| 20130175959 | DRIVER FOR SWITCHING ELEMENT AND CONTROL SYSTEM FOR ROTARY MACHINE USING THE SAME - In a driver, a charging module stores negative charge on the gate of a switching element via a normal electrical path to charge the switching element upon a drive signal representing change of an on state to an off state. This shifts the on state of the switching element to the off state. An adjusting module changes a value of a parameter correlating with a charging rate of the switching element through the normal electrical path as a function of an input signal to the driver. The input signal represents a current flowing through the conductive path, a voltage across both ends of the conductive path, or a voltage at the gate. A disabling module disables the adjusting module from changing the value of the parameter if the drive signal represents the on state of the switching element. | 07-11-2013 |
| 20130200830 | 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 driving signal for one electrical cycle, a voltage command generator which determines a modulation factor and a phase angle of driving voltage, and a pulse generator which generates the driving signal, and, in this invention, the pulse generator generates the driving signal having a pulse waveform which minimizes power loss in the power generator and the motor generator according to the number of pulses, the modulation factor, and the phase angle. | 08-08-2013 |
| 20130234638 | 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 star-connected upper phase windings is connected to a lower neutral point of a star-connected lower phase windings via a connection switch. A current-absorbing leg absorbs a current from the upper neutral point. A current-supplying leg supplies a current to the lower neutral point. Preferably, the power converter has an asymmetric bridge mode, a dual Miller mode and an accelerated bridge mode by means of switching the connection switch, the current-absorbing leg and the current-supplying leg. | 09-12-2013 |
| 20130249458 | UNIVERSAL CONTROL UNIT FOR BRUSHED OR BRUSHLESS DC MOTOR - A universal control unit for driving a brushed or a brushless DC motor, such as the type commonly employed in a vehicle fuel pump or other vehicle application. According to exemplary embodiments, a universal control unit includes a processing device and an output stage, and is connected to either a brushed or a brushless DC motor in a manner that accommodates the two different motor types so that a common or universal controller can be used. | 09-26-2013 |
| 20130264984 | 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. | 10-10-2013 |
| 20130278194 | 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 converting a DC current into an AC current is housed, a positive-side DC terminal and a negative-side DC terminal are arranged to be aligned along one side, which is formed in the widthwise direction, of one side face of the casing, and a U-phase side terminal, a V-phase side terminal, and a W-phase side terminal are arranged to be aligned along one side, which is formed in the longitudinal direction, of one side face of the casing. | 10-24-2013 |
| 20130293170 | SWITCHING CONTROL APPARATUS AND METHOD OF TWO-PHASE SWITCHED RELUCTANCE MOTOR - Disclosed herein are a switching control apparatus and method of a two-phase switched reluctance motor. The witching control apparatus includes: a rectifying unit rectifying commercial power; and an active converter including a pair of common switches commonly connected to two phase windings of the two-phase SRM, a pair of first phase switches bridge-connected to the pair of common switches at any one of the two phase windings, a pair of second phase switches bridged-connected to the pair of common switches at the other of the two phase windings and connected in series with each other, and a plurality of current feedback diodes each connected to the switches and operated in operation modes 1 to 3 to drive the two-phase SMR. | 11-07-2013 |
| 20130300328 | SWITCHING CONTROL APPARATUS FOR TWO PHASE SWITCHED RELUCTANCE MOTOR AND METHOD THEREOF - Disclosed herein are a switching control apparatus for two phase switched reluctance motor and a method thereof. The switching control apparatus includes a rectifier rectifying commercial power; and an active converter including a pair of common switches commonly connected to two phase windings of two phase SRMs, a pair of first phase switches bridge-connected to the pair of common switches at any one of the two phase windings, a pair of second phase switches bridge-connected to the pair of common switches at the other one of the two phase windings, and a plurality of current feedback diodes each connected to the switches, wherein the active converter is operated in operation modes | 11-14-2013 |
| 20130334995 | MOTOR CONTROL APPARATUS AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - A motor control apparatus includes an A/D converter, which is a hardware part for converting an analog signal of a sensor to a digital signal, a microcomputer, which is a software part, and a drive circuit, which is a hardware part for driving an inverter to supply electric power to a motor. The microcomputer includes calculation blocks, each of which is a calculation block for individually calculating an output from an input. The microcomputer further executes, in parallel to control calculations, software monitor processing for each calculation block to monitor whether the control calculation is executed normally. The motor control apparatus thus can detect a software abnormality without using a monitoring hardware circuit separately. | 12-19-2013 |
| 20140009094 | ROTARY ELECTRIC MACHINE CONTROL APPARATUS AND ELECTRIC POWER STEERING SYSTEM USING THE SAME - Synthesized signal generation circuits are provided to correspond to a U-coil, a V-coil, a W-coil, respectively, and generate synthesized signals by synthesizing a first command signal and a second command signal generated by a command signal generation circuit. CPU output terminals output the synthesized signals. Signal wires are provided with one ends being connected electrically to the CPU output terminals, respectively, and other ends being connected electrically to IC input terminals of a driver IC, respectively. Gate signal generation circuits separate the synthesized signals applied to the IC input terminals to generate first gate signals as gate signals for high-side FETs and second gate signals as gate signals for low-side FETs. | 01-09-2014 |
| 20140021896 | Apparatus and Method for Disabling the Operation of High Power Devices - A drive circuit for delivering high-level power to a load, and method of stopping a high power load from operating, are disclosed. The drive circuit includes a high power circuit capable of being coupled to the load and delivering the high level power thereto, and a to power circuit that controls the high power circuit. The low power circuit includes a first circuit portion that provides at least one control signal that is at least indirectly communicated to the high power circuit and that controls the delivering of the high level power by the high power circuit, and a second circuit portions coupled to the first circuit portion. The second circuit portion is capable of disabling the first circuit portion so that the at least one control signal avoids taking on values that would result in the high power circuit delivering the high level power to the load. | 01-23-2014 |
| 20140055066 | 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 ( | 02-27-2014 |
| 20140103845 | 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 inductive current is used to initiate reverse current flow in the motor. | 04-17-2014 |
| 20140125266 | POWER MANAGEMENT MULTI-CHIP MODULE WITH SEPARATE HIGH-SIDE DRIVER INTEGRATED CIRCUIT DIE - A packaged device includes a first die, a second die, and specially spaced and positioned sets of package terminals. The first die includes a pulse-width modulator (PWM), a processor, a timer, high-side drivers, low-side drivers, and a fault protection circuit. The second die includes ultra-high voltage high-side drivers. In an ultra-high voltage application, the PWM and external circuitry together form a switching power supply that generates a high voltage. The high voltage powers external high-side transistors. The processor and timer control the ultra-high voltage high-side drivers, that in turn supply drive signals to the external high-side transistors through the package terminals. External low-side transistors are driven directly by low-side drivers of the first die. If the fault protection circuit detects an excessive current, then the fault protection circuit supplies a disable signal to high-side and low-side drivers of both dice. The disable signal is generated without execution of processor instructions. | 05-08-2014 |
| 20140132191 | POWER FACTOR CORRECTION APPARATUS, POWER SUPPLYING APPARATUS AND MOTOR DRIVING APPARATUS HAVING THE SAME - There are provided a power factor correction apparatus capable of driving a main switch and an auxiliary switch using a single driving signal, and a power supplying apparatus and a motor driving apparatus having the same, the power factor correction apparatus including: a power factor correction unit having a main switch switching input power to correct a power factor of the input power and an auxiliary switch turned on before the main switch is turned on to form a transfer path for surplus power; and a control unit controlling operations of the main switch and the auxiliary switch based on a single input signal. | 05-15-2014 |
| 20140139160 | 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 voltage is applied and a node to which a ground voltage is applied; drivers adapted to generate gate signals in response to the switch signals; and a dead time setter adapted to set dead times during which the switches are both kept off. At least one of the drivers includes a slew rate setter adapted to vary the slew rate of the gate signals according to a slew rate setting signal. The dead time setter controls to vary at least one of the dead times according to at least one of the slew rate setting signal and the input voltage. | 05-22-2014 |
| 20140159630 | 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 (T | 06-12-2014 |
| 20140217942 | DRIVING SYSTEM FOR DRIVING SWITCHING ELEMENT - In a driving system, an applying module apples, in response to an input of an on or off command as a switching command, a switch signal to a target switching element as a high- or low-side switching element to switch the target switching element to be an on or off state. A measuring module measures a delay period defined as a time interval from a first time to a second time. The first time represents a time at which the switching command is switched from one of the on command and the off command to the other. The second time represents a time at which the target switching element is actually switched to be the on or off state. An adjusting module adjusts, based on the delay period, an input timing of a next switch signal applied from the applying module to the target switching element. | 08-07-2014 |
| 20140247000 | METHOD AND DEVICE FOR DISCHARGING AN INVERTER CAPACITOR - The invention relates to a control device for triggering a semi-conductor switch of an inverter, the control device comprising: a switching signal amplification device, which is designed to amplify a switching signal generated by a control regulation of the inverter, and to generate a first switching control signal that triggers the semi-conductor switch in a switching mode; a current regulation device, which is coupled to a current sensor output of the semiconductor switch and is designed to generate a second switching control signal that triggers the semi-conductor switch in a linear mode; and a selection device, which is coupled to the switching signal amplification device and the current regulation device and is designed to output, on the basis of at least one mode selection signal, either the first switching control signal or the second switching control signal in order to trigger a control terminal of the semi-conductor switch. | 09-04-2014 |
| 20140265967 | 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 generated in the BLDC motor. The values of the cosine of the angles between −30 degrees and +30 degrees are used to modify the duty cycle of the PWM drive signal dependent upon the rotor angular positions determined from the times between the zero crossing BEMF voltages measured at the unconnected motor terminals. | 09-18-2014 |
| 20140312817 | ELECTRONIC CIRCUIT AND METHOD FOR TRIGGERING A SEMICONDUCTOR SWITCH - An electronic circuit comprises at least one semiconductor switch mounted with its switching path in series with an inductive load to be triggered, and at least one freewheeling element that interacts with the semiconductor switch during switching phases and is also mounted in series with the load. A control unit controls a control connection of the semiconductor switch with a variable control current as a function of the time profile of a voltage measured at the freewheeling element and/or as a function of the time profile of the voltage measured at the switching path. A method for triggering a semiconductor switch of such a circuit, triggered by a variable control current for switching, the control current predefined as a function of the time profile of a voltage measured at the freewheeling element and/or as a function of the time profile of the voltage measured at the switching path. The electronic circuit according to the disclosure is advantageously used for triggering semiconductor switches of a bridge inverter circuit, in particular for operating an EC motor. | 10-23-2014 |
| 20140320050 | 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 has, on the input side, a single-phase half bridge and, on the load side, a single-phase full bridge, wherein the half bridge and the full bridge are connected on the DC voltage side in parallel with an intermediate circuit capacitor. At least one electrical line composed of several current paths connected in parallel with one another is formed in each submodule. | 10-30-2014 |
| 20140333246 | CONTROL DEVICE FOR SEMICONDUCTOR SWITCH ON AN INVERTER AND METHOD FOR THE ACTUATION OF AN INVERTER - The invention relates to a control device ( | 11-13-2014 |
| 20140354201 | 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 motor. The switching controller may use digital signals already available for driving the motor to reconstruct a replica of the phase current or the phase voltage, and thereby avoid the need for dedicated analog components for phase current or phase voltage determination. | 12-04-2014 |
| 20150108931 | 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 motor. Instead, the interface circuit generates the requisite set of motor-phase control signals using a single PWM channel from the microcontroller. The interface circuit is implemented as a standalone integrated circuit (IC) in one embodiment, and is integrated into a pre-driver circuit in another embodiment. | 04-23-2015 |
| 20150311851 | SWITCHING CONTROL DEVICE - A switching control device is applied to a motor generator drive system equipped with a boost converter and an inverter. In order to avoid generation of a superimposed surge voltage, the switching control device corrects a switching timing tsw of the booster converter so that a switching timing of the booster converter is not overlapped with a switching timing of the inverter. A booster converter switching correction means corrects the switching timing tsw of the correction target to bring forward and before a start timing tpa of the switching inhibition period Pp. This makes it possible to suppress fluctuation in output of a load due to deterioration in controllability of the electric power converter, for example, suppress fluctuation in output torque of a motor generator. | 10-29-2015 |
| 20160023572 | Activation Method for an Electric Machine - A vehicle is configured with an N-phase electric machine, a first on-board electrical sub-system and a second on-board electrical sub-system. The electric machine includes a rotor and a stator system, wherein the first onboard electrical sub-system includes an inverter and the stator system is linked to the inverter. The electric machine can be operated using an inverter controller on the principle of a field-oriented control system, so that the electric machine is linked to a control unit, wherein the inverter can be controlled by the control unit, and the control unit uses a phased activation method to control the inverter. | 01-28-2016 |
| 20160028334 | DRIVE CIRCUIT FOR A BRUSHLESS MOTOR (as amended) - A drive circuit for a brushless motor comprising power lines for carrying an AC voltage, an inverter, and a controller. Each leg of the inverter is connected to a winding of the motor and comprises one or more bi-directional switches. The controller can output control signals that cause a pair of switches to conduct in one direction during the positive half-cycle of the AC voltage, and to conduct in the opposite direction during the negative half-cycle of the AC voltage. Alternatively, The controller can output control signals that cause a first pair of switches to conduct during the positive half-cycle of the AC voltage and a second pair of switches to conduct during the negative half-cycle of the AC voltage such that the winding is excited in the same direction irrespective of the polarity of the AC voltage. | 01-28-2016 |
| 20160035824 | SEMICONDUCTOR DEVICE, METHOD OF MANUFACTURING THE SAME, AND POWER MODULE - A semiconductor device includes an n-type drain layer, an n-type base layer provided on the n-type drain layer, a p-type base layer and an n-type source layer partially formed in surface layer portions of the n-type base layer and the p-type base layer, respectively, a gate insulation film formed on a surface of the p-type base layer between the n-type source layer and the n-type base layer, a gate electrode formed on the gate insulation film facing the p-type base layer across the gate insulation film, a p-type column layer formed within the n-type base layer to extend from the p-type base layer toward the n-type drain layer, a depletion layer alleviation region arranged between the p-type column layer and the n-type drain layer and including first baryons converted to donors, a source electrode connected to the n-type source layer, and a drain electrode connected to the n-type drain layer. | 02-04-2016 |
| 20160065102 | LOW SIDE AND HIGH SIDE DRIVERS FOR A MOTOR - A driver circuit for driving a portion of a motor system is disclosed. The driver circuit may include a current reverse detector operable to detect a current direction associated with the portion of the motor system, an insulated gate bipolar transistor (“IGBT”) driver, and an IGBT. The IGBT driver may include: a first input coupled to an output of the current reverse detector and a second input coupled to an operation indication signal. | 03-03-2016 |
| 20160099665 | Dynamic IGBT Gate Drive For Vehicle Traction Inverters - A hybrid electric vehicle includes a traction battery, traction motor and power inverter therebetween. The power inverter converts the DC power of the traction battery to AC power to drive each phase of the traction motor. The power inverter includes Insulated Gate Bipolar junction Transistors (IGBTs) to modulate the power to the traction motor. The speed at which the IGBTs are modulated impacts the system performance including power loss, voltage overshoot and current overshoot. Using a dual emitter IGBT to provide a current mirror of the drive current, circuitry may be used with the gate drive circuitry such that the gate drive speed may be dynamically adjusted based on characteristics including temperature and traction motor rotational speed. | 04-07-2016 |
| 20160134220 | Modular Multi-Phase Electric Machine - A multi-phase electric motor is proposed that comprises a rotor and a stator. The rotor has a number of magnets directed towards the stator and the stator includes a plurality of phase windings directed towards the magnets. The phase windings are connected to control units that are adapted to selectively apply a current to the phase windings to induce an electromagnetic force which acts upon the magnets to effect a rotation of the rotor. The motor comprises at least two control units, each being configured to control the supply of current to three phase windings such that a different phase current is supplied to each of the three phase windings with a phase shift between said different phase currents being 120°, and wherein no two control units utilise the same current phase. By distributing current over at least six phases and utilising two or more control units operating as simple 3-phase motors, low voltage operation is enabled without the associated disadvantages of high winding currents, while control is simplified over conventional systems. | 05-12-2016 |
| 20160181957 | Brushless Direct Current Motor and Driving Apparatus Thereof | 06-23-2016 |
| 20170237381 | MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD | 08-17-2017 |
| 318400280 | Diverse high side or low side switching | 14 |
| 20090218972 | METHOD AND APPARATUS FOR DETECTING REVERSE CURRENT, AND METHOD AND APPARATUS FOR DRIVING MOTOR - A reverse current detection apparatus determines whether an electrical conduction control to a motor coil of a motor is in a predetermined state based on a timing signal representing a timing at which to conduct a source current or a sink current through the motor coil and a control signal for a half bridge in a power stage, and compares the output voltage of the power stage with a threshold value, so as to detect the presence/absence of a reverse flow of a phase current based on these results. A motor driving apparatus for driving a motor under a PWM control includes a rectification switching section for switching a rectification scheme from one to another based on the reverse current detection apparatus and a detection result thereof. | 09-03-2009 |
| 20100123419 | ASYMMETRICAL DRIVER - A drive circuit having asymmetrical drivers. In an embodiment, a brushless DC motor may be driven by a drive circuit having three high-side MOSFETs and three low-side MOSFETs. A driver controller turns the MOSFETs on and off according to a drive algorithm such that phase currents are injected into motor coils to be driven. The high-side MOSFETs may be sized differently than the low-side MOSFETs. As such, when a MacDonald waveform (or similar drive algorithm) is used to drive the phases of the motor, less power may be required during disk spin-up because the MOSFETs that are on more (e.g., the low-side MOSFETs with a MacDonald waveform) may be sized larger than the MOSFETs that are on less (e.g., the high-side MOSFETs). In this manner, less power is dissipated in the larger size MOSFETs that are on more than the others. | 05-20-2010 |
| 20100270959 | MOTOR CONTROL DEVICE AND CONTROLLER THEREOF - A motor control device is electrically connected with a motor. The motor control device includes a controller and a driving circuit. The controller has a default value of time and generates a first driving signal and a second driving signal. The driving circuit includes a first switching element and a second switching element, the first switching element and the second switching element receive the first driving signal and the second driving signal respectively, and the first switching element and the second switching element are switched on or switched off alternately according to the first driving signal and the second driving signal respectively, so as to drive the motor to operate. The controller switches off the first switching element by the first driving signal the default value of time before the controller switches on the second switching element by the second driving signal, and the controller switches off the second switching element by the second driving signal the default value of time before the controller switches on the first switching element by the first driving signal. | 10-28-2010 |
| 20100283419 | METHOD FOR OPERATION OF A TWO-PHASE ELECTRONICALLY COMMUTATED MOTOR AND MOTOR FOR CARRYING OUT SAID METHOD - A two-stranded electronically commutated DC motor has a permanent-magnet rotor ( | 11-11-2010 |
| 20100289440 | Active Pull-Up System - An active pull-up system for use with a motor is described. The active pull-up system comprises: a first resistor coupled to an Output node; a first switch and a second resistor coupled in parallel with the first resistor, wherein the first switch is in series with the second resistor; a latch coupled to the first switch for either keeping the first switch open or closing the first switch in response to receiving a closing signal; and a threshold comparator coupled between the output node and the latch, wherein the threshold comparator transmits the closing signal when the output node exceeds a threshold value, which actively pulls up the output node. | 11-18-2010 |
| 20110156628 | Radiation hardened motor drive stage - A radiation hardened motor drive stage utilizes a non-radiation hardened P-channel FET switch. The radiation hardened motor drive stage includes a non-radiation hardened P-channel FET switch that is connected three (3) pairs of upper and lower switch blocks or legs wherein the output of each pair is connected to a motor winding switch terminal. The upper switch blocks or legs are connected the P-channel switch a. The lower switch block or legs are connected to a negative power bus. The negative power bus permits the N-channel FETS or IGTS within the switch blocks or legs exposed to ionized radiation to be controlled, even when their gate threshold voltage has dropped below zero volts. | 06-30-2011 |
| 20120126736 | Bootstrapped High-Side Driver Control Without Static DC Current for Driving a Motor Bridge Circuit - A motor driver circuit for driving the gate node of a high-side driver transistor to a boosted voltage from a charge pump draws little or no static current from the charge pump. The gate node is pulled to the boosted voltage by a p-channel pullup-control transistor that is driven by p-channel transistors that are pumped by capacitors that cut off current flow to ground from the charge pump. An n-channel output-shorting transistor shorts the gate node to the output when the high-side driver is turned off. A coupling capacitor initializes the shorting transistor for each output transition. A p-channel output-sensing transistor generates a feedback to a second stage that drives the coupling capacitor. P-channel diode transistors and an n-channel equalizing transistor control the voltage on the coupling capacitor. | 05-24-2012 |
| 20120206076 | MOTOR-DRIVING APPARATUS FOR VARIABLE-SPEED MOTOR - An object of the invention is to provide a motor-driving apparatus for driving a variable-speed motor, which increases a motor torque and efficiency at a high rotation speed. The motor-driving apparatus has a three-phase inverter and a boost DC/DC converter, which are operated the single-phase-switching method. The three-phase inverter consists of a nine-switch inverter applying the three-phase voltage to two three-phase windings of the motor. The single-phase-switching method reduces a switching power loss of the nine switch inverter largely. The boost DC/DC converter boosting a battery voltage reduces a copper loss of the inverter and the motor, too. | 08-16-2012 |
| 20120235615 | BRUSHLESS ELECTRIC MOTOR PROVIDED WITH ROTOR HAVING INTERMEDIATE MAGNETIC POLE - An AC electric motor includes an annular A-phase winding WA wound in the circumferential direction of a stator, a stator pole group SPGA configured to generate magnetic flux φA to interlink with the A-phase winding WA, an annular B-phase winding WB wound in the circumferential direction, and a stator pole group SPGB configured to generate magnetic flux φB to interlink with the B-phase winding WB. The motor additionally includes a third stator pole group SPGC, N and S magnetic poles of the rotor, and X magnetic poles, which serve as third rotor poles, showing magnetic characteristics between the N and S magnetic poles of the rotor. DC currents are supplied to the A-phase and B-phase windings WA and WB to generate rotational torque. | 09-20-2012 |
| 20120293100 | DRIVING CONTROL APPARATUS OF BRUSHLESS MOTOR - A driving control apparatus includes an inverter circuit, a motor driving circuit and a motor control unit. In performing overlap energization, at a start time of an overlap time period, a pulse width of a first PWM signal at an energization side is widened to increase a number of pulses of a second PWM signal accordingly, and a first PWM signal at an energization side corresponding to a constant voltage side is also widened. | 11-22-2012 |
| 20130038259 | METHOD FOR IMPLEMENTING BOOTSTRAP-SUPPLY CHARGING IN A MOTOR CONTROLLER AT ENERGIZED MOTOR AND MOTOR CONTROLLER USING SUCH A METHOD - The present invention relates to a motor controller employing bootstrap-capacitor supplies and in particular to the situation where the bootstrap supplies have to be charged, while the motor controller is connected to a spinning and energized motor. The present invention introduces a method of recharging based on choosing a recharging sequence from a set of recharging sequences, where the choice depends on the state of the connected motor and in particular on the back-EMF voltages of the motor. | 02-14-2013 |
| 20130342144 | BRUSHLESS MOTOR CONTINUATION CONTROL IN A POWER TOOL - A control unit for controlling commutation of a brushless direct current (BLDC) motor provided. The control unit controls high-side and low-side switches arranged between a power source and the motor and configured as a three-phase bridge to commutate the motor. The control unit is configured to provide drive signals to drive each of the high-side and low-side switches to control, for each phase of the bridge, a pulse-width modulation (PWM) of one of the high-side or low-side switches. For each phase of the bridge, immediately following a first cycle ending with a falling edge of the drive signal for one of the high-side or low-side switches, the control unit introduces a special commutation edge pulse in the drive signal of the other of the high-side or low-side switches to shunt the current from the motor before turning both the high-side and the low-side switches off during a second cycle. | 12-26-2013 |
| 20160079892 | INVERTER CIRCUIT FOR AN ELECTRIC MACHINE - An inverter circuit electrically connects between a high-voltage bus and a multi-phase electric machine, including a plurality of switch pairs. Each switch pair includes a first switch electrically connected in series with a second switch at a node. Each node electrically connects to a phase of the multi-phase electric machine with the first switch electrically connected between a positive side of the high-voltage bus and the node and the second switch electrically connected between a negative side of the high-voltage bus and the node. The first switch is configured as a normally-OFF switch. The second switch is configured as a normally-ON switch. | 03-17-2016 |
| 20160137071 | RESONANT MOTOR SYSTEM - A resonant motor system having a resonant circuit that includes magnetic coils and of capacitors, for generating an electric power when the resonant lot is rotated by an engine, a regenerating portion for the resonant motor, a motor driving portion, a motor control portion, and a capacitor portion for storing therein the electric power generated by the resonant motor when the resonant motor is regenerated, the resonant rotor being driven by the electric power stored in the capacitor portion when the engine is assisted by the resonant motor. | 05-19-2016 |
