Inventor
HIRAGA MASAHIRO
JP19 patents
⚠️ This page may combine multiple inventors who share the name “HIRAGA MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
6 patentsUS6704212B2Mar 9, 2004
PWM inverter with long carrier wave insertion
HITACHI LTD44 citations92
US6556464B2Apr 29, 2003
PWM converter system
HITACHI LTD30 citations92
US6496397B2Dec 17, 2002
Inverter device
HITACHI LTD29 citations92
US6486548B1Nov 26, 2002
Semiconductor module and power converting apparatus using the module
HITACHI LTD28 citations92
US5949663ASep 7, 1999
Inverter apparatus capable of readily modification of the specification and performance thereof
HITACHI LTD31 citations92
US6693404B2Feb 17, 2004
AC current detecting device for inverter apparatus and AC current detecting method therefor
HITACHI LTD14 citations83
HITACHI IND EQUIPMENT SYS
5 patentsUS7904254B2Mar 8, 2011
Power conversion apparatus and method of estimating power cycle life
HITACHI IND EQUIPMENT SYS9 citations83
US7394668B2Jul 1, 2008
Switching power supply circuit and frequency converter
HITACHI IND EQUIPMENT SYS7 citations73
US7643304B2Jan 5, 2010
Filter apparatus and frequency converter to which the filter apparatus is connected
HITACHI IND EQUIPMENT SYS6 citations62
US7151680B2Dec 19, 2006
Switching power supply circuit and frequency converter
HITACHI IND EQUIPMENT SYS3 citations62
US8378599B2Feb 19, 2013
Power transducer
HITACHI IND EQUIPMENT SYS0 citations52