Inventor
KUROSAWA TOSHIAKI
15 patents
Patents
15 patentsUS4884182ANov 28, 1989
Current source power converting apparatus with overvoltage protection
HITACHI LTD26 citations92
US4870556ASep 26, 1989
Method and apparatus for controlling power converter
HITACHI LTD28 citations92
US4833586AMay 23, 1989
PWM control for power converter system utilizing pulse dropping at minimum pulse widths
HITACHI LTD31 citations92
US5389749AFeb 14, 1995
Elevator system
HITACHI LTD51 citations89
US4263988AApr 28, 1981
Speed control system for a motor
HITACHI LTD23 citations81
US4031439AJun 21, 1977
Over-speed preventing apparatus for DC motor
HITACHI LTD10 citations74
US4779709AOct 25, 1988
Apparatus for controlling AC elevators
HITACHI LTD8 citations73
US4636932AJan 13, 1987
dv/dt Protection circuit device for an AC-DC converter apparatus
HITACHI LTD7 citations73
US4629034ADec 16, 1986
Elevator control apparatus
HITACHI LTD13 citations73
US4553640ANov 19, 1985
Controller for elevator
HITACHI LTD17 citations73
US4361866ANov 30, 1982
Power converter apparatus
HITACHI LTD9 citations73
US4133018AJan 2, 1979
Thyristor fault-detecting apparatus
HITACHI LTD16 citations73
US4171505AOct 16, 1979
Fault detecting system for a control system
HITACHI LTD7 citations71
US4256204AMar 17, 1981
Safety apparatus for elevator system
HITACHI LTD8 citations70
US4584636AApr 22, 1986
AC-to-DC power converter with improved power factor and overvoltage suppression
HITACHI LTD3 citations62