P

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 patents
US6304472B1Oct 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

ISHIKAWA KATSUMI

1 patent

ARAKI DAIJIRO

1 patent

SUGIURA TETSU

1 patent