Inventor

NIWA SADAHIKO

JP3 patents

Patents

3 patents

US4812730AMar 14, 1989

Variable-speed generator/motor system

HITACHI LTD28 citations89

US4364032ADec 14, 1982

Method and apparatus for diagnosing local overheating in a rotary electric machine

HITACHI LTD18 citations71

US4373376AFeb 15, 1983

Method and apparatus for diagnosing overheating of an electric machine

HITACHI LTD2 citations54