Patent application number | Description | Published |
20100176783 | SWITCHING DEVICE DRIVE CIRCUIT - A gate voltage detecting circuit | 07-15-2010 |
20100301784 | POWER CONVERSION CIRCUIT - In a power conversion circuit operating with high frequency, an off-voltage control circuit | 12-02-2010 |
20110057591 | SYNCHRONOUS ELECTRIC MOTOR DRIVE SYSTEM - The present invention provides a synchronous motor drive system designed to realize reduced vibration and noise along with high output. The system includes: inverters | 03-10-2011 |
20110074239 | SYNCHRONOUS MOTOR DRIVE SYSTEM - Provided is a synchronous motor including a rotor having magnetic poles distributed circumferentially along a rotation direction of the rotor at equal intervals, and a stator having stator teeth arranged circumferentially along the rotation direction of the rotor, each tooth wound with a stator coil by concentrated winding. Every M consecutive stator teeth belong to one of stator teeth groups arranged at equal intervals. The M consecutive stator teeth in each stator teeth group are arranged at intervals different from the intervals of the magnetic poles of the rotor. The stator coils wound around the M consecutive stator teeth are connected to separate terminals. A motor driver supplies currents of different phases to the stator coils via the respective terminals. | 03-31-2011 |
20110101906 | SYNCHRONOUS ELECTRIC MOTOR SYSTEM - The present invention aims to provide a synchronous motor drive system that is capable of suppressing ripples in current while reducing switching loss. The system includes three-phase inverters | 05-05-2011 |
20110168697 | ELECTRIC POWER CONVERTING APPARATUS AND INDUCTION HEATING APPARATUS - To aim to reduce ripple current flowing through a capacitor in a power converter apparatus including a converter, the capacitor and an inverter. A current sensor | 07-14-2011 |
20110260656 | LOAD DRIVE SYSTEM, MOTOR DRIVE SYSTEM, AND VEHICLE CONTROL SYSTEM - Provided is a small-sized load drive system which, even with three three-phase inverters, significantly reduces noise regardless of control duty ratio. The load drive system includes three-phase inverters | 10-27-2011 |
20110304236 | SYNCHRONOUS ELECTRIC MOTOR - Enhancing torque while reducing torque rippling. | 12-15-2011 |
20120307540 | POWER CONVERSION DEVICE - The present invention aims to provide a power converter with an arm including switching devices connected in parallel, realizing long lifespans of switching devices. An inverter includes an upper and a lower arm, and gate drive circuits each driving the corresponding arm according to a gate control signal Gup_s indicating ON/OFF periods. Each arm includes switching devices connected in parallel. Each gate drive circuit includes: a switching gate control circuit | 12-06-2012 |
20130009624 | POWER SOURCE SWITCH DEVICE AND POWER SOURCE SYSTEM PROVIDED WITH SAME - Provided are semiconductor elements | 01-10-2013 |
20130026968 | MOTOR DRIVE APPARATUS - A motor drive apparatus receiving power from a power source and driving a motor with independent polyphase systems of excitation coils, comprises: a control circuit and power converters each corresponding to one system, each including an inverter circuit, an interrupter circuit, and a temperature detector, the inverter circuits being connected in series to the power source and, while not short-circuited, supplying power to the excitation coil, wherein the control circuit detects an operating state of the motor, short-circuits the inverter circuits and interrupts the interrupter circuits for a subset of power converters defined according to the operating state, such that a source voltage is supplied to non-short-circuited inverter circuits, and, when a power converter exceeds a predetermined temperature, the control circuit short-circuits the inverter circuit and interrupts the interrupter circuit thereof, and, in another power converter not exceeding the predetermined temperature, operates the inverter circuit and connects the interrupter circuit. | 01-31-2013 |
20130039100 | POWER CONVERTING APPARATUS - A power converter for effectively reducing switching noise is provided. The power converter comprises a capacitor | 02-14-2013 |