Takeki Ando

Person

Nakamachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Power converter with current-type inverter
- Patent number 5,155,671
- Issue date Oct 13, 1992
- Hitachi Ltd.
- Hiromi Inaba
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Current source power converting apparatus with overvoltage protection
- Patent number 4,884,182
- Issue date Nov 28, 1989
- Hitachi, Ltd.
- Takeki Ando
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
PWM control for power converter system utilizing pulse dropping at...
- Patent number 4,833,586
- Issue date May 23, 1989
- Hitachi, Ltd.
- Hiromi Inaba
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Current-type converter apparatus
- Patent number 4,787,021
- Issue date Nov 22, 1988
- Hitachi, Ltd.
- Sadao Hokari
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Apparatus for controlling AC elevators
- Patent number 4,779,709
- Issue date Oct 25, 1988
- Hitachi, Ltd.
- Nobuo Mitsui
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Current-type converter protecting apparatus
- Patent number 4,757,436
- Issue date Jul 12, 1988
- Hitachi, Ltd.
- Shigeta Ueda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
dv/dt Protection circuit device for an AC-DC converter apparatus
- Patent number 4,636,932
- Issue date Jan 13, 1987
- Hitachi, Ltd.
- Toshiaki Kurosawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Elevator control apparatus
- Patent number 4,629,034
- Issue date Dec 16, 1986
- Hitachi, Ltd.
- Hiromi Inaba
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
AC-to-DC power converter with improved power factor and overvoltage...
- Patent number 4,584,636
- Issue date Apr 22, 1986
- Hitachi, Ltd.
- Takeki Ando
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Controller for elevator
- Patent number 4,553,640
- Issue date Nov 19, 1985
- Hitachi, Ltd.
- Hiromi Inaba
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Power converter apparatus
- Patent number 4,361,866
- Issue date Nov 30, 1982
- Hitachi, Ltd.
- Seiya Shima
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Speed control system for a motor
- Patent number 4,263,988
- Issue date Apr 28, 1981
- Hitachi, Ltd.
- Hiromi Inaba
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Safety apparatus for elevator system
- Patent number 4,256,204
- Issue date Mar 17, 1981
- Hitachi, Ltd.
- Takeki Ando
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Fault detecting system for a control system
- Patent number 4,171,505
- Issue date Oct 16, 1979
- Hitachi, Ltd.
- Seiya Shima
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Thyristor fault-detecting apparatus
- Patent number 4,133,018
- Issue date Jan 2, 1979
- Hitachi, Ltd.
- Mutsuhiro Terunuma
- G01 - MEASURING TESTING
Information Patent Grant
Control apparatus for DC motor
- Patent number 4,099,111
- Issue date Jul 4, 1978
- Hitachi, Ltd.
- Hiromi Inaba
- B66 - HOISTING LIFTING HAULING

Takeki Ando

Person

Patents Grantslast 30 patents

Power converter with current-type inverter

Current source power converting apparatus with overvoltage protection

PWM control for power converter system utilizing pulse dropping at...

Current-type converter apparatus

Apparatus for controlling AC elevators

Current-type converter protecting apparatus

dv/dt Protection circuit device for an AC-DC converter apparatus

Elevator control apparatus

AC-to-DC power converter with improved power factor and overvoltage...

Controller for elevator

Power converter apparatus

Speed control system for a motor

Safety apparatus for elevator system

Fault detecting system for a control system

Thyristor fault-detecting apparatus

Control apparatus for DC motor