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Inventor:
Kitajima; Yasuhiko
Address:
Kamakura, JP
No. of patents:
15
Patents:












Patent Number Title Of Patent Date Issued
7710063 Electric power converter May 4, 2010
An electric power converter, electric power conversion system and method that, without using a DC-DC converter, uses and allots the electric power of plural power sources while reducing the volume and losses. At least one phase of the motor is connected to plural power sources and genera
7683511 Power converter and related method March 23, 2010
A power converter that is arranged in series with a motor to form a unitary structure through which an output shaft extends is provided with a plurality of coolers and a power semiconductor module mounted on a cooling surface of at least one of the plurality of coolers to supply elec
7659689 Power conversion apparatus and method and automobile February 9, 2010
An apparatus and method for supplying a polyphase (AC) alternating current motor with driving voltages. A conversion unit is coupled to phases of the polyphase AC motor and includes a plurality of switching devices and includes, in at least one phase, a first switching device between a b
7656689 Power converter and control method for a power converter using serially-connected DC power sourc February 2, 2010
A control method for a power converter capable of reducing overall volume of a system and energy loss by using a plurality of power sources and distributing loads to them without a DCDC converter. The power converter has DC power sources and poles formed by connecting various poles of th
7557527 Electrical power converter and control method July 7, 2009
An electrical power converter comprises a first direct current line connected to a first direct current source, a second direct current line connected to a second direct current source, an alternating current line connected to an alternating current motor, a controller, and a pulse g
7112931 Motor control device and motor control method September 26, 2006
An inverter supply voltage generator comprises an inverter supply voltage computing unit 10, a voltage converter 11 and a battery 12. The inverter supply voltage generator varies inverter supply voltage Vdc in synchronization with motor-application voltages Vu_pwm, Vv_pwm, and Vw_pwm
7034493 Motor control apparatus and motor control method April 25, 2006
A motor control apparatus having a fundamental wave current control circuit that implements feedback control on a fundamental wave component of a motor current in a dq coordinate system rotating in synchronization with the rotation of the motor and a higher harmonic current control c
7030526 Integrated drive motor/differential/inverter unit with improved housing for a vehicle April 18, 2006
An integrated drive motor unit which is integrally constituted of a motor, an inverter and a reducer differential unit arranged in a row, and a frame member. The reducer differential unit is connected to an output shaft of the motor, and distributes torque of the motor to a pair of a
6861813 Motor control apparatus and motor control method March 1, 2005
Limits are imposed on a fundamental voltage command value calculated at a fundamental current control circuit that controls a fundamental component of a 3-phase AC motor current in a dq-axis coordinate system rotating in synchronization with the rotation of the 3-phase AC motor by using
6768280 Motor control apparatus July 27, 2004
A motor control apparatus includes a fundamental wave current control system that controls a fundamental wave component of a motor current in an orthogonal coordinate system and a higher harmonic current control system that controls a higher harmonic component contained in the motor curr
6727675 Motor control apparatus and motor control method April 27, 2004
A motor control apparatus comprises a fundamental current control device that controls a fundamental current in a 3-phase AC motor in an orthogonal coordinate system constituted of a d-axis and a q-axis rotating in synchronization with the rotation of the 3-phase AC motor, a higher h
6674262 Motor control apparatus and motor control method January 6, 2004
A motor control apparatus comprises a fundamental current command value determining device that determines a fundamental current command value for a motor current based upon at least a torque command value for an AC motor, a higher harmonics current command value determining device that
6486632 Control device for motor/generators November 26, 2002
A controller for motor/generators is proposed which allows reductions in ripple current generated by an inverter driving a power-generating motor/generator and a vehicle-driving motor/generator. The control device for motor/generators has a first inverter which supplies a control current
6341584 Valve timing control device and method for vehicle engine January 29, 2002
This invention relates to a valve timing control device for a vehicle engine (2) which performs combustion stop in a predetermined vehicle running condition. The predetermined vehicle running condition comprises, for example, engine startup, and combustion stop is performed by stopping
6253127 Engine startup control device and control method June 26, 2001
A hybrid vehicle is provided with an engine (2), a first motor (1) for starting the engine (2), a generator (1) for driving the engine (2), drive wheels (8) connected to the engine (2) via a clutch (3), and a second motor (4) for driving the drive wheels (8). A battery (15) connected to










 
 
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