Masahiro Hiraga

Person

Yachiyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Speed calculation device and power conversion device
- Patent number 11,870,384
- Issue date Jan 9, 2024
- Hitachi Industrial Equipment Systems Co., Ltd.
- Hiroshi Watanabe
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power transducer
- Patent number 8,531,140
- Issue date Sep 10, 2013
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Temperature detection method of semiconductor device and power conv...
- Patent number 8,423,317
- Issue date Apr 16, 2013
- Hitachi Industrial Equipment Systems Co., Ltd.
- Tomoya Kamezawa
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Power transducer
- Patent number 8,378,599
- Issue date Feb 19, 2013
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric power conversion system
- Patent number 8,159,820
- Issue date Apr 17, 2012
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Power transducer
- Patent number 8,120,294
- Issue date Feb 21, 2012
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power conversion apparatus and method of estimating power cycle life
- Patent number 7,904,254
- Issue date Mar 8, 2011
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Filter apparatus and frequency converter to which the filter appara...
- Patent number 7,643,304
- Issue date Jan 5, 2010
- Hitachi Industrial Equipment Systems Co., Ltd.
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric power converter
- Patent number 7,515,422
- Issue date Apr 7, 2009
- Hitachi Industrial Equipment System Co.
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Switching power supply circuit and frequency converter
- Patent number 7,394,668
- Issue date Jul 1, 2008
- Hitachi Industrial Equipment Systems Co., Ltd.
- Tooru Nakajima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Switching power supply circuit and frequency converter
- Patent number 7,151,680
- Issue date Dec 19, 2006
- Hitachi Industrial Equipment Systems Co., Ltd.
- Tooru Nakajima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
PWM inverter with long carrier wave insertion
- Patent number 6,704,212
- Issue date Mar 9, 2004
- Hitachi, Ltd.
- Teiichi Furukawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
AC current detecting device for inverter apparatus and AC current d...
- Patent number 6,693,404
- Issue date Feb 17, 2004
- Hitachi, Ltd.
- Masahiro Hiraga
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
PWM converter system
- Patent number 6,556,464
- Issue date Apr 29, 2003
- Hitachi, Ltd.
- Keijirou Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Inverter device
- Patent number 6,496,397
- Issue date Dec 17, 2002
- Hitachi, Ltd.
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Semiconductor module and power converting apparatus using the module
- Patent number 6,486,548
- Issue date Nov 26, 2002
- Hitachi, Ltd.
- Kinya Nakatsu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Inverter apparatus capable of readily modification of the specifica...
- Patent number 5,949,663
- Issue date Sep 7, 1999
- Hitachi, Ltd.
- Tsunehiro Endo
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Power Conversion Device
- Publication number 20230291334
- Publication date Sep 14, 2023
- HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
- Fumihiro SATO
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Power Conversion Device and Remote Monitoring System
- Publication number 20230268823
- Publication date Aug 24, 2023
- HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
- Daisuke MATSUMOTO
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Speed Calculation Device and Power Conversion Device
- Publication number 20210075347
- Publication date Mar 11, 2021
- HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
- Hiroshi WATANABE
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER TRANSDUCER
- Publication number 20130342136
- Publication date Dec 26, 2013
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER TRANSDUCER
- Publication number 20130127382
- Publication date May 23, 2013
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER TRANSDUCER
- Publication number 20120119685
- Publication date May 17, 2012
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER TRANSDUCER
- Publication number 20090224704
- Publication date Sep 10, 2009
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...
- Publication number 20090046434
- Publication date Feb 19, 2009
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...
- Publication number 20090046435
- Publication date Feb 19, 2009
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...
- Publication number 20090040733
- Publication date Feb 12, 2009
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
FILTER APPARATUS AND FREQUENCY COVERTER TO WHICH THE FILTER APPARAT...
- Publication number 20090040743
- Publication date Feb 12, 2009
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Electric power conversion system
- Publication number 20090034309
- Publication date Feb 5, 2009
- Hitachi Industrial Equipment Systems Co., Ltd.
- Satoshi Ibori
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
POWER CONVERSION APPARATUS AND METHOD OF ESTIMATING POWER CYCLE LIFE
- Publication number 20080262750
- Publication date Oct 23, 2008
- Satoshi Ibori
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Electric power converter
- Publication number 20070279864
- Publication date Dec 6, 2007
- Masayuki Hirota
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
Temperature detection method of semiconductor device and power conv...
- Publication number 20050197799
- Publication date Sep 8, 2005
- Tomoya Kamezawa
- G01 - MEASURING TESTING
Information Patent Application
Filter apparatus and frequency converter to which the filter appara...
- Publication number 20050126811
- Publication date Jun 16, 2005
- Masayuki Hirota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Switching power supply circuit and frequency converter
- Publication number 20040066661
- Publication date Apr 8, 2004
- Hitachi Industrial Equipment Systems Co., Ltd.
- Tooru Nakajima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method for modulating pulse width, power converter, and inverter
- Publication number 20030142517
- Publication date Jul 31, 2003
- Hitachi, Ltd
- Teiichi Furukawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
AC current detecting device for inverter apparatus and AC current d...
- Publication number 20030020430
- Publication date Jan 30, 2003
- Hitachi, Ltd
- Masahiro Hiraga
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
PWM converter system
- Publication number 20020154526
- Publication date Oct 24, 2002
- Keijirou Sakai
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Inverter device
- Publication number 20010043481
- Publication date Nov 22, 2001
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Masahiro Hiraga

Person

Patents Grantslast 30 patents

Speed calculation device and power conversion device

Power transducer

Temperature detection method of semiconductor device and power conv...

Power transducer

Electric power conversion system

Power transducer

Power conversion apparatus and method of estimating power cycle life

Filter apparatus and frequency converter to which the filter appara...

Electric power converter

Switching power supply circuit and frequency converter

Switching power supply circuit and frequency converter

PWM inverter with long carrier wave insertion

AC current detecting device for inverter apparatus and AC current d...

PWM converter system

Inverter device

Semiconductor module and power converting apparatus using the module

Inverter apparatus capable of readily modification of the specifica...

Patents Applicationslast 30 patents

Power Conversion Device

Power Conversion Device and Remote Monitoring System

Speed Calculation Device and Power Conversion Device

POWER TRANSDUCER

POWER TRANSDUCER

POWER TRANSDUCER

POWER TRANSDUCER

FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...

FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...

FILTER APPARATUS AND FREQUENCY CONVERTER TO WHICH THE FILTER APPARA...

FILTER APPARATUS AND FREQUENCY COVERTER TO WHICH THE FILTER APPARAT...

Electric power conversion system

POWER CONVERSION APPARATUS AND METHOD OF ESTIMATING POWER CYCLE LIFE

Electric power converter

Temperature detection method of semiconductor device and power conv...

Filter apparatus and frequency converter to which the filter appara...

Switching power supply circuit and frequency converter

Method for modulating pulse width, power converter, and inverter

AC current detecting device for inverter apparatus and AC current d...

PWM converter system

Inverter device