Inventor
HARAGUCHI EIJI
JP7 patents
Patents
7 patentsUS4754156AJun 28, 1988
Control apparatus for variable-speed hydraulic power generating system
HITACHI LTD66 citations95
US4812729AMar 14, 1989
Protecting apparatus for secondary excitation type variable speed AC generator/motor
HITACHI LTD64 citations94
US4694189ASep 15, 1987
Control system for variable speed hydraulic turbine generator apparatus
HITACHI LTD85 citations94
US4823018AApr 18, 1989
Control system for variable speed water-wheel generator apparatus
HITACHI LTD37 citations92
US4870339ASep 26, 1989
Variable-speed power generating system
HITACHI LTD22 citations80
US4766360AAug 23, 1988
Induction generator/motor system
HITACHI LTD9 citations72
US4743826AMay 10, 1988
Pumping-up generator/motor system and method of operation of the same
HITACHI LTD4 citations60