Inventor
SAKAI KEIJIRO
JP19 patents
Patents
19 patentsUS6229719B1May 8, 2001
Method of inverter control and apparatus of the same
HITACHI LTD67 citations96
US5475293ADec 12, 1995
Method for measuring characteristic constants of alternating current motor and controller thereof based on said method
HITACHI LTD60 citations96
US4688162AAug 18, 1987
Rectifier control apparatus with improved power factor
HITACHI LTD53 citations94
US4599549AJul 8, 1986
Method and apparatus for controlling PWM inverters
HITACHI LTD62 citations94
US6741063B2May 25, 2004
Inverter apparatus
HITACHI LTD16 citations92
US6496397B2Dec 17, 2002
Inverter device
HITACHI LTD29 citations92
US5184057AFeb 2, 1993
Control method and device for ac motor
HITACHI LTD35 citations92
US5023538AJun 11, 1991
PWM inverter apparatus for controlling rotating magnetic flux in a.c. motors
HITACHI LTD22 citations92
US4480299AOct 30, 1984
Method of controlling the output voltage of a pulse width modulation inverter
HITACHI LTD32 citations92
US4437051AMar 13, 1984
Method and apparatus for controlling induction motor
HITACHI LTD32 citations92
US4419615ADec 6, 1983
Method of controlling pulse width modulated inverter for use in induction motor drive
HITACHI LTD36 citations92
US7250696B2Jul 31, 2007
Linear motor and X-Y stage
HITACHI LTD11 citations84
US6844700B2Jan 18, 2005
Inverter apparatus
HITACHI LTD14 citations83
US4562524ADec 31, 1985
Control apparatus for PWM inverter
HITACHI LTD20 citations81
US6657412B2Dec 2, 2003
Pulse width modulation method, pulse width modulator and power converter
HITACHI LTD11 citations74
US4420718ADec 13, 1983
Control system for induction motor using inverter for AC power supply
HITACHI LTD17 citations73
US7004694B2Feb 28, 2006
Linear drive apparatus
HITACHI LTD6 citations72
US5053690AOct 1, 1991
Control method of pulse width modulation inverter and pulse width modulation inverter system
HITACHI LTD18 citations70
US7777371B2Aug 17, 2010
Linear drive apparatus having cores and coils which are positioned on opposite sides of the cores
HITACHI LTD2 citations61