Toshiaki Okuyama

Person

Naka-gun, Ibaraki 319-11, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Electric power converter suppressing output voltage variation due t...
- Patent number 7,869,232
- Issue date Jan 11, 2011
- Hitachi, Ltd.
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Induction motor controller
- Patent number 7,671,558
- Issue date Mar 2, 2010
- Hitachi Industrial Equipment Systems Co., Ltd.
- Kouki Yamamoto
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Driver for induction motor and method of driving the same
- Patent number 7,545,116
- Issue date Jun 9, 2009
- Hitachi Industrial Equipment Systems Co., Ltd.
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Driving apparatus for a motor
- Patent number 7,332,888
- Issue date Feb 19, 2008
- Hitachi, Ltd.
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Inverter apparatus
- Patent number 6,844,700
- Issue date Jan 18, 2005
- Hitachi, Ltd.
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Machine tool
- Patent number 6,841,911
- Issue date Jan 11, 2005
- Hitachi, Ltd.
- Houng Joong Kim
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Inverter apparatus
- Patent number 6,741,063
- Issue date May 25, 2004
- Hitachi, Ltd.
- Keijiro Sakai
- 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
Apparatus for controlling an induction motor
- Patent number 6,670,786
- Issue date Dec 30, 2003
- Hitachi, Ltd.
- Kazuaki Tobari
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Pulse width modulation method, pulse width modulator and power conv...
- Patent number 6,657,412
- Issue date Dec 2, 2003
- Hitachi, Ltd.
- Seiji Ishida
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Controller of AC machine
- Patent number 6,646,896
- Issue date Nov 11, 2003
- Hitachi, Ltd.
- Yoshitoshi Akita
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control apparatus for power converter
- Patent number 6,642,689
- Issue date Nov 4, 2003
- Hitachi, Ltd.
- Seiji Ishida
- B60 - VEHICLES IN GENERAL
Information Patent Grant
DC apparatus and vehicle using the same
- Patent number 6,633,495
- Issue date Oct 14, 2003
- Hitachi, Ltd.
- Seiji Ishda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method for calculating inertia moment and driver for electric motor
- Patent number 6,611,125
- Issue date Aug 26, 2003
- Hitachi, Ltd.
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method for controlling a vehicle provided with an electric power co...
- Patent number 6,556,460
- Issue date Apr 29, 2003
- Hitachi, Ltd.
- Seiji Ishida
- 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
Method of controlling an induction motor
- Patent number 6,344,726
- Issue date Feb 5, 2002
- Hitachi, Ltd.
- Kazuaki Tobari
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Speed controlling method for induction motor
- Patent number 6,300,741
- Issue date Oct 9, 2001
- Hitachi, Ltd.
- Toshiaki Okuyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method of inverter control and apparatus of the same
- Patent number 6,229,719
- Issue date May 8, 2001
- Hitachi, Ltd.
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method for measuring characteristic constants of alternating curren...
- Patent number 5,475,293
- Issue date Dec 12, 1995
- Hitachi, Ltd.
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric vehicle control system
- Patent number 5,414,339
- Issue date May 9, 1995
- Ryoso Masaki
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Control apparatus and control method for motor drive vehicle
- Patent number 5,355,749
- Issue date Oct 18, 1994
- Hitachi, Ltd.
- Sanshiro Obara
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Motor-driven power steering apparatus
- Patent number 5,033,565
- Issue date Jul 23, 1991
- Hitachi, Ltd.
- Toshimi Abukawa
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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
Motor-driven power steering apparatus
- Patent number 4,960,178
- Issue date Oct 2, 1990
- Hitachi, Ltd.
- Toshimi Abukawa
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Control apparatus for cascaded converter circuit
- Patent number 4,884,184
- Issue date Nov 28, 1989
- Hitachi, Ltd.
- Takayuki Matsui
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electric power steering control system
- Patent number 4,875,539
- Issue date Oct 24, 1989
- Hitachi, Ltd.
- Toshimi Abukawa
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Vector control system for induction motors
- Patent number 4,808,903
- Issue date Feb 28, 1989
- Hitachi, Ltd.
- Takayuki Matsui
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
INDUCTION MOTOR CONTROLLER
- Publication number 20080169783
- Publication date Jul 17, 2008
- KOUKI YAMAMOTO
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
ELECTRIC POWER CONVERTER APPARATUS
- Publication number 20080088291
- Publication date Apr 17, 2008
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
DRIVER FOR INDUCTION MOTOR AND METHOD OF DRIVING THE SAME
- Publication number 20070210741
- Publication date Sep 13, 2007
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Driving apparatus for a motor
- Publication number 20060192521
- Publication date Aug 31, 2006
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Inverter apparatus
- Publication number 20040008005
- Publication date Jan 15, 2004
- Keijiro Sakai
- 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
DC apparatus and vehicle using the same
- Publication number 20030043609
- Publication date Mar 6, 2003
- Seiji Ishida
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Controller of AC machine
- Publication number 20030043610
- Publication date Mar 6, 2003
- Yoshitoshi Akita
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
A METHOD FOR CONTROLLING A VEHICLE PROVIDED WITH AN ELECTRONIC POWE...
- Publication number 20030043605
- Publication date Mar 6, 2003
- Hitachi, Ltd.
- Seiji Ishida
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Inverter apparatus
- Publication number 20030020432
- Publication date Jan 30, 2003
- Keijiro Sakai
- 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
Control apparatus for power converter
- Publication number 20020141212
- Publication date Oct 3, 2002
- Seiji Ishida
- B60 - VEHICLES IN GENERAL
Information Patent Application
Machine tool
- Publication number 20020117922
- Publication date Aug 29, 2002
- Hitachi, Ltd.
- Houng Joong Kim
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method for calculating inertia moment and driver for electric motor
- Publication number 20020097018
- Publication date Jul 25, 2002
- Koichiro Nagata
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Pulse width modulation method, pulse width modulator and power conv...
- Publication number 20020093391
- Publication date Jul 18, 2002
- Seiji Ishida
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Apparatus for controlling an induction motor
- Publication number 20020060549
- Publication date May 23, 2002
- Kazuaki Tobari
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Inverter device
- Publication number 20010043481
- Publication date Nov 22, 2001
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Toshiaki Okuyama

Person

Patents Grantslast 30 patents

Electric power converter suppressing output voltage variation due t...

Induction motor controller

Driver for induction motor and method of driving the same

Driving apparatus for a motor

Inverter apparatus

Machine tool

Inverter apparatus

PWM inverter with long carrier wave insertion

Apparatus for controlling an induction motor

Pulse width modulation method, pulse width modulator and power conv...

Controller of AC machine

Control apparatus for power converter

DC apparatus and vehicle using the same

Method for calculating inertia moment and driver for electric motor

Method for controlling a vehicle provided with an electric power co...

PWM converter system

Inverter device

Method of controlling an induction motor

Speed controlling method for induction motor

Method of inverter control and apparatus of the same

Method for measuring characteristic constants of alternating curren...

Electric vehicle control system

Control apparatus and control method for motor drive vehicle

Motor-driven power steering apparatus

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

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

Motor-driven power steering apparatus

Control apparatus for cascaded converter circuit

Electric power steering control system

Vector control system for induction motors

Patents Applicationslast 30 patents

INDUCTION MOTOR CONTROLLER

ELECTRIC POWER CONVERTER APPARATUS

DRIVER FOR INDUCTION MOTOR AND METHOD OF DRIVING THE SAME

Driving apparatus for a motor

Inverter apparatus

Method for modulating pulse width, power converter, and inverter

DC apparatus and vehicle using the same

Controller of AC machine

A METHOD FOR CONTROLLING A VEHICLE PROVIDED WITH AN ELECTRONIC POWE...

Inverter apparatus

PWM converter system

Control apparatus for power converter

Machine tool

Method for calculating inertia moment and driver for electric motor

Pulse width modulation method, pulse width modulator and power conv...

Apparatus for controlling an induction motor

Inverter device