Tomofumi Okubo

Person

Narashino, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Compressor, monitoring system, and method of monitoring compressor
- Patent number 11,933,291
- Issue date Mar 19, 2024
- Hitachi Industrial Equipment Systems Co., Ltd.
- Tomofumi Okubo
- G01 - MEASURING TESTING
Information Patent Grant
Electric motor system
- Patent number 10,644,638
- Issue date May 5, 2020
- Hitachi Industrial Equipment Systems Co., Ltd.
- Tomofumi Okubo
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor controller, air compressor, air conditioner, controller of pa...
- Patent number 9,136,788
- Issue date Sep 15, 2015
- Hitachi, Ltd.
- Tomofumi Okubo
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Synchronous motor driving apparatus
- Patent number 7,276,876
- Issue date Oct 2, 2007
- Hitachi Industrial Equipment Systems Co., Ltd.
- Daigo Kaneko
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor drive system for AC motors
- Patent number 7,064,514
- Issue date Jun 20, 2006
- Hitachi, Ltd.
- Yoshitaka Iwaji
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Driving systems of AC motor
- Patent number 7,030,589
- Issue date Apr 18, 2006
- Hitachi Industrial Equipment Systems Co., Ltd.
- Daigo Kaneko
- 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 operatable over extended frequency range while s...
- Patent number 6,169,670
- Issue date Jan 2, 2001
- Hitachi, Ltd.
- Tomofumi Okubo
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Compressor, Monitoring System, and Method of Monitoring Compressor
- Publication number 20220260075
- Publication date Aug 18, 2022
- HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
- Tomofumi OKUBO
- G01 - MEASURING TESTING
Information Patent Application
Electric Motor System
- Publication number 20190109557
- Publication date Apr 11, 2019
- HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
- Tomofumi OKUBO
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Motor Controller, Air Compressor, Air Conditioner, Controller of Pa...
- Publication number 20110056226
- Publication date Mar 10, 2011
- Hitachi, Ltd
- Tomofumi Okubo
- B60 - VEHICLES IN GENERAL
Information Patent Application
Synchronous moter driving apparatus
- Publication number 20060113948
- Publication date Jun 1, 2006
- Daigo Kaneko
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Driving systems of AC motor
- Publication number 20040263114
- Publication date Dec 30, 2004
- Daigo Kaneko
- 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
Motor drive system for AC motors
- Publication number 20040183498
- Publication date Sep 23, 2004
- Yoshitaka Iwaji
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Control apparatus for controlling inverter for driving permanent ma...
- Publication number 20040113572
- Publication date Jun 17, 2004
- Hitachi, Ltd
- Yoshitaka Iwaji
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
System for driving electric motor
- Publication number 20030071588
- Publication date Apr 17, 2003
- Yoshitaka Iwaji
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Tomofumi Okubo

Person

Patents Grantslast 30 patents

Compressor, monitoring system, and method of monitoring compressor

Electric motor system

Motor controller, air compressor, air conditioner, controller of pa...

Synchronous motor driving apparatus

Motor drive system for AC motors

Driving systems of AC motor

Control method and control device of permanent-magnet type synchron...

Inverter apparatus operatable over extended frequency range while s...

Patents Applicationslast 30 patents

Compressor, Monitoring System, and Method of Monitoring Compressor

Electric Motor System

Motor Controller, Air Compressor, Air Conditioner, Controller of Pa...

Synchronous moter driving apparatus

Driving systems of AC motor

Control method and control device of permanent-magnet type synchron...

Motor drive system for AC motors

Control apparatus for controlling inverter for driving permanent ma...

System for driving electric motor