Yuzuru Kubota

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Control method and device for AC motor
- Patent number 5,184,057
- Issue date Feb 2, 1993
- Hitachi, Ltd.
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for operating a variable speed power generatio...
- Patent number 5,029,288
- Issue date Jul 2, 1991
- Hitachi, Ltd.
- Yuzuru Kubota
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Parallel multi-inverter system and motor drive system using the same
- Patent number 5,016,158
- Issue date May 14, 1991
- Hitachi, Ltd.
- Takayuki Matsui
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method of controlling inverter-driven induction motor
- Patent number 4,680,526
- Issue date Jul 14, 1987
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Converter control apparatus and method
- Patent number 4,625,272
- Issue date Nov 25, 1986
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
PWM Converter with control circuit responsive to minimum holding cu...
- Patent number 4,486,824
- Issue date Dec 4, 1984
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Motor control system
- Patent number 4,344,025
- Issue date Aug 10, 1982
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric control apparatus of induction motor
- Patent number 4,330,741
- Issue date May 18, 1982
- Hitachi, Ltd.
- Hiroshi Nagase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control apparatus of synchronous motor having thyristor converter
- Patent number 4,295,084
- Issue date Oct 13, 1981
- Hitachi, Ltd.
- Hiroshi Nagase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control apparatus for induction motor
- Patent number 4,277,735
- Issue date Jul 7, 1981
- Hitachi, Ltd.
- Toshiaki Okuyama
Information Patent Grant
Control device for commutatorless motor
- Patent number 4,276,504
- Issue date Jun 30, 1981
- Hitachi, Ltd.
- Hiroshi Nagase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control system for suppressing torque ripple in synchronous motor
- Patent number 4,240,020
- Issue date Dec 16, 1980
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Harmonic eliminating apparatus
- Patent number 4,206,395
- Issue date Jun 3, 1980
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control system for a.c. motors
- Patent number 4,132,931
- Issue date Jan 2, 1979
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control apparatus for use in a synchronous machine
- Patent number 4,125,796
- Issue date Nov 14, 1978
- Hitachi, Ltd.
- Hiroshi Nagase
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Yuzuru Kubota

Person

Patents Grantslast 30 patents

Control method and device for AC motor

Method and apparatus for operating a variable speed power generatio...

Parallel multi-inverter system and motor drive system using the same

Method of controlling inverter-driven induction motor

Converter control apparatus and method

PWM Converter with control circuit responsive to minimum holding cu...

Motor control system

Electric control apparatus of induction motor

Control apparatus of synchronous motor having thyristor converter

Control apparatus for induction motor

Control device for commutatorless motor

Control system for suppressing torque ripple in synchronous motor

Harmonic eliminating apparatus

Control system for a.c. motors

Control apparatus for use in a synchronous machine