Takefumi Sawada

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Ishioka, JP

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Patents Grantslast 30 patents

Information Patent Grant
AC motor controller
- Patent number 7,759,888
- Issue date Jul 20, 2010
- Hitachi, Ltd.
- Hirokazu Matsui
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric power converter and motor driving system
- Patent number 7,541,769
- Issue date Jun 2, 2009
- Hitachi, Ltd.
- Masamichi Nawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor control apparatus and electric vehicle using same
- Patent number 6,914,408
- Issue date Jul 5, 2005
- Hitachi, Ltd.
- Takefumi Sawada
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Position-sensorless motor control method and apparatus
- Patent number 6,788,024
- Issue date Sep 7, 2004
- Hitachi, Ltd.
- Satoru Kaneko
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control apparatus of synchronous motors
- Patent number 6,329,781
- Issue date Dec 11, 2001
- Hitachi, Ltd.
- Hirokazu Matsui
- B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
AC Motor Controller
- Publication number 20090059446
- Publication date Mar 5, 2009
- Hitachi, Ltd
- Hirokazu Matsui
- G01 - MEASURING TESTING
Information Patent Application
Electric power converter and motor driving system
- Publication number 20070176575
- Publication date Aug 2, 2007
- HITACHI, LTD.
- Masamichi Nawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Position-sensorless motor control method and apparatus
- Publication number 20040051495
- Publication date Mar 18, 2004
- Satoru Kaneko
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Motor control apparatus and electric vehicle using same
- Publication number 20020117990
- Publication date Aug 29, 2002
- HITACHI LTD.
- Takefumi Sawada
- B60 - VEHICLES IN GENERAL