Inventor
KAWAI TADAO
JP6 patents
Patents
6 patentsUS5255202AOct 19, 1993
Digital signal processing method and system, electric power system signal processing system and electric power control system
HITACHI LTD38 citations91
US5428553AJun 27, 1995
Digital control and protection equipment for power system
HITACHI LTD44 citations90
US5099409AMar 24, 1992
Semiconductor electric power conversion system enabling fault and/or overtemperature protection
HITACHI LTD20 citations80
US5265002ANov 23, 1993
Fault protection for a multiphase bridge power converter
HITACHI LTD15 citations72
US4430683AFeb 7, 1984
Ground fault detecting device for use with a DC circuit
HITACHI LTD17 citations72
US4441032AApr 3, 1984
Converter control apparatus for parallel connected multi-terminal direct current system
HITACHI LTD13 citations71