Keijiro Sakai

Person

Kanasago, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Linear drive apparatus having cores and coils which are positioned...
- Patent number 7,777,371
- Issue date Aug 17, 2010
- Hitachi, Ltd.
- Houng Joong Kim
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Linear motor and X-Y stage
- Patent number 7,250,696
- Issue date Jul 31, 2007
- Hitachi, Ltd.
- Houng Joong Kim
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Linear drive apparatus
- Patent number 7,004,694
- Issue date Feb 28, 2006
- Hitachi, Ltd.
- Houng Joong Kim
- 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
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
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
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 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
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
Control method of pulse width modulation inverter and pulse width m...
- Patent number 5,053,690
- Issue date Oct 1, 1991
- Hitachi, Ltd.
- Nobuyoshi Mutoh
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
PWM inverter apparatus for controlling rotating magnetic flux in a....
- Patent number 5,023,538
- Issue date Jun 11, 1991
- Hitachi, Ltd.
- Nobuyoshi Mutoh
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Rectifier control apparatus with improved power factor
- Patent number 4,688,162
- Issue date Aug 18, 1987
- Hitachi, Ltd.
- Nobuyoshi Mutoh
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for controlling PWM inverters
- Patent number 4,599,549
- Issue date Jul 8, 1986
- Hitachi, Ltd.
- Nobuyoshi Mutoh
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control apparatus for PWM inverter
- Patent number 4,562,524
- Issue date Dec 31, 1985
- Hitachi, Ltd.
- Nobuyoshi Mutoh
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method of controlling the output voltage of a pulse width modulatio...
- Patent number 4,480,299
- Issue date Oct 30, 1984
- Hitachi, Ltd.
- Nobuyoshi Muto
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for controlling induction motor
- Patent number 4,437,051
- Issue date Mar 13, 1984
- Hitachi, Ltd.
- Nobuyoshi Muto
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control system for induction motor using inverter for AC power supply
- Patent number 4,420,718
- Issue date Dec 13, 1983
- Hitachi, Ltd.
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method of controlling pulse width modulated inverter for use in ind...
- Patent number 4,419,615
- Issue date Dec 6, 1983
- Hitachi, Ltd.
- Nobuyoshi Muto
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Linear drive apparatus
- Publication number 20060091736
- Publication date May 4, 2006
- Houng Joong Kim
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Linear motor and X-Y stage
- Publication number 20050104454
- Publication date May 19, 2005
- Hitachi, Ltd
- Houng Joong Kim
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Linear drive apparatus
- Publication number 20040090128
- Publication date May 13, 2004
- Houng Joong Kim
- 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
Inverter apparatus
- Publication number 20030020432
- Publication date Jan 30, 2003
- Keijiro Sakai
- 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
Inverter device
- Publication number 20010043481
- Publication date Nov 22, 2001
- Keijiro Sakai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Keijiro Sakai

Person

Patents Grantslast 30 patents

Linear drive apparatus having cores and coils which are positioned...

Linear motor and X-Y stage

Linear drive apparatus

Inverter apparatus

Inverter apparatus

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

Inverter device

Method of inverter control and apparatus of the same

Method for measuring characteristic constants of alternating curren...

Control method and device for AC motor

Control method of pulse width modulation inverter and pulse width m...

PWM inverter apparatus for controlling rotating magnetic flux in a....

Rectifier control apparatus with improved power factor

Method and apparatus for controlling PWM inverters

Control apparatus for PWM inverter

Method of controlling the output voltage of a pulse width modulatio...

Method and apparatus for controlling induction motor

Control system for induction motor using inverter for AC power supply

Method of controlling pulse width modulated inverter for use in ind...

Patents Applicationslast 30 patents

Linear drive apparatus

Linear motor and X-Y stage

Linear drive apparatus

Inverter apparatus

Inverter apparatus

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

Inverter device