Inventor
UEDA SHIGETA
JP23 patents
Patents
23 patentsUS6541877B2Apr 1, 2003
Wind power generation system
HITACHI LTD63 citations96
US5298848AMar 29, 1994
Large capacity variable speed PWM spatial vector type sub-harmonic system for driving AC electric motor
HITACHI LTD79 citations94
US6975055B2Dec 13, 2005
Dynamo-electric machine having a rotor with first and second axially or rotationally displaceable field magnets
HITACHI LTD34 citations92
US6490182B2Dec 3, 2002
Power conversion apparatus
HITACHI LTD23 citations92
US6452261B1Sep 17, 2002
Flat semiconductor device and power converter employing the same
HITACHI LTD24 citations92
US6389041B1May 14, 2002
Synchronization system and synchronization method of multisystem control apparatus
HITACHI LTD31 citations92
US6304468B2Oct 16, 2001
Phase synchronization system for connecting a power converter to a power distribution system
HITACHI LTD23 citations92
US4965504AOct 23, 1990
Control apparatus for inverter for driving AC motor
HITACHI LTD30 citations92
US4787021ANov 22, 1988
Current-type converter apparatus
HITACHI LTD26 citations92
US4672520AJun 9, 1987
Current-source power converting apparatus with self-extinction devices
HITACHI LTD29 citations92
US4599685AJul 8, 1986
Control circuit for power converter apparatus
HITACHI LTD33 citations92
US4926306AMay 15, 1990
Electric power converter
HITACHI LTD27 citations89
US4829416AMay 9, 1989
Apparatus for controlling power transducers of the pulse width modulation (PWM) control type
HITACHI LTD21 citations82
US4581693AApr 8, 1986
Apparatus for repeatedly applying short-circuit pulses to a current type inverter for output current control
HITACHI LTD18 citations74
US6809561B2Oct 26, 2004
Semiconductor power converting apparatus
HITACHI LTD8 citations73
US6703874B2Mar 9, 2004
Gate driver for MOS control semiconductor devices
HITACHI LTD8 citations73
US6038683AMar 14, 2000
Replicated controller and fault recovery method thereof
HITACHI LTD15 citations73
US4779709AOct 25, 1988
Apparatus for controlling AC elevators
HITACHI LTD8 citations73
US4757436AJul 12, 1988
Current-type converter protecting apparatus
HITACHI LTD13 citations73
US4549259AOct 22, 1985
Gate control circuit for current-type inverter apparatus
HITACHI LTD4 citations63
US7158521B2Jan 2, 2007
Synchronization system and synchronization method of multisystem control apparatus
HITACHI LTD3 citations62
US6727516B2Apr 27, 2004
Semiconductor power conversion apparatus
HITACHI LTD3 citations62
US6717177B2Apr 6, 2004
Semiconductor power conversion apparatus
HITACHI LTD0 citations52