Inventor
KIYOFUJI YASUHIRO
JP15 patents
⚠️ This page may combine multiple inventors who share the name “KIYOFUJI YASUHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
9 patentsUS7888894B2Feb 15, 2011
Electric motor control system, series hybrid vehicle, electric motor control apparatus, and electric motor control method
HITACHI LTD55 citations95
US6304468B2Oct 16, 2001
Phase synchronization system for connecting a power converter to a power distribution system
HITACHI LTD23 citations92
US7315144B2Jan 1, 2008
AC drive apparatus, vehicle control apparatus, and power conversion method and vehicle control method
HITACHI LTD9 citations83
US7841434B2Nov 30, 2010
Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicle
HITACHI LTD11 citations81
US7643317B2Jan 5, 2010
Power converting device and method for controlling the same
HITACHI LTD7 citations71
US9252684B2Feb 2, 2016
Power conversion apparatus and high-voltage DC transmission system
HITACHI LTD2 citations61
US8386862B2Feb 26, 2013
Fault diagnosis apparatus and fault diagnosis method of multi-channel analog input/output circuit
HITACHI LTD4 citations56
US6839696B1Jan 4, 2005
Guarantee charge processing method and apparatus
HITACHI LTD1 citations48
US9573489B2Feb 21, 2017
Control device for railway power conditioner and control system for railway power conditioner
HITACHI LTD0 citations45