Inventor
NAGASU MASAHIRO
JP26 patents
⚠️ This page may combine multiple inventors who share the name “NAGASU MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
23 patentsUS6304472B1Oct 16, 2001
Electric power converting system with integrator providing output indicative of current
HITACHI LTD84 citations98
US6271709B1Aug 7, 2001
Gate drive circuit of voltage drive switching element
HITACHI LTD102 citations98
US5859446AJan 12, 1999
Diode and power converting apparatus
HITACHI LTD96 citations98
US6380796B2Apr 30, 2002
Semiconductor power converting apparatus
HITACHI LTD60 citations95
US7570085B2Aug 4, 2009
Gate driver circuit for switching device
HITACHI LTD37 citations92
US6759964B2Jul 6, 2004
Fault detection system
HITACHI LTD17 citations92
US6724313B2Apr 20, 2004
Fault detection system
HITACHI LTD31 citations92
US6452261B1Sep 17, 2002
Flat semiconductor device and power converter employing the same
HITACHI LTD24 citations92
US6204717B1Mar 20, 2001
Semiconductor circuit and semiconductor device for use in equipment such as a power converting apparatus
HITACHI LTD28 citations92
US5877518AMar 2, 1999
Semiconductor device and inverter apparatus using the semiconductor device
HITACHI LTD18 citations92
US7737761B2Jun 15, 2010
Gate drive circuit with reduced switching loss and noise
HITACHI LTD29 citations91
US7783396B2Aug 24, 2010
Hybrid cruising control system
HITACHI LTD13 citations84
US6600978B2Jul 29, 2003
Railway vehicle operation-control system and a railway vehicle using the operation control system
HITACHI LTD13 citations84
US6414370B1Jul 2, 2002
Semiconductor circuit preventing electromagnetic noise
HITACHI LTD15 citations84
US7880174B2Feb 1, 2011
Circuit arrangement having a free-wheel diode
HITACHI LTD10 citations83
US7046155B2May 16, 2006
Fault detection system
HITACHI LTD8 citations74
US5767555AJun 16, 1998
Compound semiconductor device controlled by MIS gate, driving method therefor and electric power conversion device using the compound semiconductor device and the driving method
HITACHI LTD9 citations74
US7965056B2Jun 21, 2011
Control apparatus of power conversion system
HITACHI LTD6 citations73
US6242968B1Jun 5, 2001
Semiconductor power converting apparatus
HITACHI LTD6 citations73
US5962877AOct 5, 1999
Inverter apparatus having improved switching element
HITACHI LTD5 citations63
US5831293ANov 3, 1998
Semiconductor thyristor switching device and power converter using same
HITACHI LTD3 citations63
US7994826B2Aug 9, 2011
Drive circuit for power semiconductor switching device
HITACHI LTD6 citations61
US7577668B2Aug 18, 2009
Information transmission system and information transmission method
HITACHI LTD4 citations61