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Hidefumi Shirahama
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Hitachi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Synchronous motor and control method of synchronous motor
Patent number
8,421,395
Issue date
Apr 16, 2013
Hitachi, Ltd.
Daisuke Maeda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Apparatus and method for driving synchronous motor
Patent number
8,035,330
Issue date
Oct 11, 2011
Hitachi, Ltd.
Daisuke Maeda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Apparatus and method for driving synchronous motor
Patent number
7,839,113
Issue date
Nov 23, 2010
Hitachi, Ltd.
Daisuke Maeda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
System and method for driving synchronous motor
Patent number
7,342,378
Issue date
Mar 11, 2008
Hitachi, Ltd.
Kiyoshi Sakamoto
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Motor drive device that combined charge controller
Patent number
7,332,882
Issue date
Feb 19, 2008
Hitachi, Ltd.
Shigehisa Aoyagi
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Apparatus and method for controlling AC motor and module therefor
Patent number
7,148,651
Issue date
Dec 12, 2006
Hitachi, Ltd.
Kazuaki Tobari
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Apparatus for controlling an a. c. motor
Patent number
7,075,266
Issue date
Jul 11, 2006
Hitachi, Ltd.
Kazuaki Tobari
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Control method and control device of permanent-magnet type synchron...
Patent number
6,954,050
Issue date
Oct 11, 2005
Hitachi, Ltd.
Kazuaki Tobari
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Inverter apparatus and uinterruptible power supply using the same
Patent number
5,446,645
Issue date
Aug 29, 1995
Hitachi, Ltd.
Hidefumi Shirahama
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power supply control system
Patent number
5,297,015
Issue date
Mar 22, 1994
Hitachi, Ltd.
Hideki Miyazaki
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Parallel inverter control apparatus
Patent number
5,262,935
Issue date
Nov 16, 1993
Hitachi, Ltd.
Hidefumi Shirahama
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Circuit for controlling an electric power supply apparatus, a metho...
Patent number
5,115,386
Issue date
May 19, 1992
Hitachi, Ltd.
Hidefumi Shirahama
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
APPARATUS AND METHOD FOR DRIVING SYNCHRONOUS MOTOR
Publication number
20110018485
Publication date
Jan 27, 2011
Daisuke Maeda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SYNCHRONOUS MOTOR AND CONTROL METHOD OF SYNCHRONOUS MOTOR
Publication number
20090256505
Publication date
Oct 15, 2009
Hitachi, Ltd.
Daisuke MAEDA
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
APPARATUS AND METHOD FOR DRIVING SYNCHRONOUS MOTOR
Publication number
20080203962
Publication date
Aug 28, 2008
Daisuke Maeda
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
System and method for driving synchronous motor
Publication number
20070120519
Publication date
May 31, 2007
Kiyoshi Sakamoto
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Motor drive device that combined charge controller
Publication number
20070024219
Publication date
Feb 1, 2007
Shigehisa Aoyagi
B60 - VEHICLES IN GENERAL
Information
Patent Application
Apparatus and method for controlling AC motor and module therefor
Publication number
20050017671
Publication date
Jan 27, 2005
Hitachi, Ltd.
Kazuaki Tobari
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Control method and control device of permanent-magnet type synchron...
Publication number
20040207358
Publication date
Oct 21, 2004
Kazuaki Tobari
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Apparatus for controlling an a. c. motor
Publication number
20040189243
Publication date
Sep 30, 2004
Hitachi, Ltd.
Kazuaki Tobari
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER