Inventor
OBARA SANSHIRO
JP47 patents
⚠️ This page may combine multiple inventors who share the name “OBARA SANSHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
45 patentsUS5914582AJun 22, 1999
Permanent magnet synchronous motor controller and electric vehicle controller
HITACHI LTD136 citations98
US5355749AOct 18, 1994
Control apparatus and control method for motor drive vehicle
HITACHI LTD214 citations98
US5357181AOct 18, 1994
Failure detection method for electric vehicles and fail-safe control method using this method
HITACHI LTD123 citations98
US5920161AJul 6, 1999
Driving system for permanent magnet type synchronous machine suitable for electric vehicle and driving control method using the same
HITACHI LTD140 citations97
US6555988B2Apr 29, 2003
Motor control device
HITACHI LTD67 citations96
US6198256B1Mar 6, 2001
Control apparatus for a synchronous generator system and a hybrid-type electric vehicle using it
HITACHI LTD58 citations96
US5659235AAug 19, 1997
Drive controller and control method for electric vehicle
HITACHI LTD89 citations96
US5481168AJan 2, 1996
Electric vehicle torque controller
HITACHI LTD67 citations96
US5467275ANov 14, 1995
Control apparatus for electric vehicle
HITACHI LTD51 citations96
US5345155ASep 6, 1994
Control system for electric vehicle
HITACHI LTD100 citations96
US5309073AMay 3, 1994
Electric vehicle control device
HITACHI LTD67 citations96
US6429565B1Aug 6, 2002
Permanent magnet type electric rotating machine and hybrid electric vehicle using it
HITACHI LTD36 citations93
US6373219B1Apr 16, 2002
Motor control system and motor control method
HITACHI LTD26 citations93
US5677604AOct 14, 1997
Control system and control method for electric automobile
HITACHI LTD34 citations93
US5600215AFeb 4, 1997
Controller for electric vehicle
HITACHI LTD39 citations93
US5534764AJul 9, 1996
Vehicle driving control system having function for suppressing vibration
HITACHI LTD44 citations93
US4712052ADec 8, 1987
Digital servo-control system
HITACHI LTD26 citations93
US6791227B2Sep 14, 2004
Dynamo electric machine and method of manufacturing the same
HITACHI LTD36 citations92
US6255798B1Jul 3, 2001
Control apparatus for electric vehicle
HITACHI LTD34 citations92
US6236172B1May 22, 2001
Driving system for electric vehicle
HITACHI LTD31 citations92
US6008617ADec 28, 1999
Motor control device for high frequency AC driven motor
HITACHI LTD21 citations92
US5994870ANov 30, 1999
Method of estimating field pole position of synchronous motor, motor controlled, and electric vehicle
HITACHI LTD30 citations92
US5994881ANov 30, 1999
Control apparatus for a synchronous generator system and a hybrid-type electric vehicle using it
HITACHI LTD23 citations92
US5877601AMar 2, 1999
Control system for electric vehicle and control method therefor in which an inverter relay is controlled at the time of its re-closing after being disconnected
HITACHI LTD41 citations92
US5841263ANov 24, 1998
Frequency dependent current control system for an AC motor
HITACHI LTD27 citations92
US5726890AMar 10, 1998
Control apparatus for electric vehicle
HITACHI LTD27 citations92
US5661380AAug 26, 1997
Method and apparatus for operating an electric vehicle drive system during periods of sensor malfunction
HITACHI LTD46 citations92
US5650700AJul 22, 1997
Electric vehicle torque controller
HITACHI LTD43 citations92
US5631819AMay 20, 1997
Power converter
HITACHI LTD41 citations92
US5610483AMar 11, 1997
Control equipment for electric vehicle and control method thereof
HITACHI LTD44 citations92
US5557181ASep 17, 1996
Brake control apparatus for electric motor vehicle
HITACHI LTD25 citations92
US5495908AMar 5, 1996
Electric car control system
HITACHI LTD40 citations92
US5349351ASep 20, 1994
Analog-digital converting device
HITACHI LTD46 citations92
US5418932AMay 23, 1995
Generation of width modulated pulses by relatively adjusting rising and falling edges upon comparison of counter with programmably stored values
HITACHI LTD22 citations91
US5877607AMar 2, 1999
Electric motor controller capable of performing stable current control during load disturbance and/or a regenerating mode
HITACHI LTD18 citations84
US5631796AMay 20, 1997
Electric vehicle control system
HITACHI LTD16 citations74
US4276602AJun 30, 1981
Electronic engine control apparatus having arrangement for varying fuel injection duration
HITACHI LTD15 citations74
US4367530AJan 4, 1983
Control apparatus for an internal combustion engine
HITACHI LTD16 citations73
US5289517AFeb 22, 1994
Digital pulse processing device
HITACHI LTD15 citations72
US4058755ANov 15, 1977
Kramer system utilizing a commutatorless motor
HITACHI LTD8 citations72
US6154002ANov 28, 2000
Control apparatus for permanent magnet electric motor used in electric motor vehicle
HITACHI LTD9 citations71
US6072288AJun 6, 2000
Control apparatus for permanent magnet electric motor used in electric motor vehicle in which a predetermined magnetic pole location signal pulse is supplied upon starting
HITACHI LTD6 citations71
US4481819ANov 13, 1984
Method and apparatus for detecting metal wipe damages of plane bearing
HITACHI LTD17 citations71
US4373379AFeb 15, 1983
Method and apparatus for detecting defects in a water cooling system of a hydrogen-cooled dynamic electric machine
HITACHI LTD13 citations70
US6963154B2Nov 8, 2005
Permanent magnet type electric rotating machine and hybrid electric vehicle using it
HITACHI LTD1 citations52