1
Satoshi Tamaki, Yasufumi Ikkai, Yasuhiro Kondo: Protecting device of electromobile. Matsushita Electric Industrial, Wenderoth Lind & Ponack L, October 10, 2000: US06131057 (46 worldwide citation)

A protecting device of electromobile has control device to control the rotating speed of a motor on the basis of an accelerator signal, a brake signal, and output signals from an encoder sensor, a CS sensor, and a phase current detector, which includes a device for detecting interruption of input of ...


2
Satoshi Tamaki, Katsumi Imada, Tatsutoshi Suenaga: Compound eye camera module and method of producing the same. Panasonic Corporation, Hamre Schumann Mueller & Larson P C, June 5, 2012: US08194169 (41 worldwide citation)

An optical filter array (2) having a plurality of optical filters (2a to 2d) and a light shielding block (6) having light shielding walls (61a to 61d) forming a plurality of openings (6a to 6d) independent from each other are placed between a lens module (7) integrally having a plurality of lenses ( ...


3
Kazushige Narazaki, Tomokuni Iijima, Yoshiaki Igarashi, Satoshi Tamaki: Controller for permanent magnet synchronous motor. Matsushita Electric Industrial, Renner Otto Boisselle Sklar, July 29, 1997: US05652495 (33 worldwide citation)

A controller for a permanent magnet synchronous motor which includes a D-axis current command section and a Q-axis current command section. The D-axis current command section increases the command value of the D-axis current so as to set a judged value to be zero by leading the current phase when th ...


4
Satoshi Tamaki, Yasufumi Ikkai, Yasuhiro Kondo: Method and apparatus for controlling motor. Matsushita Electric Industrial, Wenderoth Lind & Ponack, April 2, 1996: US05504404 (33 worldwide citation)

In a method and an apparatus for controlling a motor, one type or a plurality of types of weakening current are previously set, a first torque command current determined from a speed deviation between a speed command to the motor and the present speed of the motor is compared with torque currents co ...


5
Takashi Yano, Satoshi Tamaki, Seishi Hanaoka, Takeshi Kato: Data transmission method for a mobile communication system. Hitachi, Mattingly Stanger Malur & Brundidge P C, April 8, 2008: US07356004 (28 worldwide citation)

This invention provides a mobile communication system which expanded the operation limitation of the heretofore adopted mobile communication systems and improved the spectrum efficiency greatly. A data transmission method for use in the mobile communication system of the present invention includes m ...


6
Satoshi Tamaki, Yasuhiro Kondo, Yasufumi Ikkai: Method and apparatus for controlling a synchronous motor. Matsushita Electric Industrial, Panitch Schwarze Jacobs & Nadel P C, March 9, 1999: US05880570 (28 worldwide citation)

An inverter(3) for driving a motor(4) of an electric automobile(20) produces a three-phase PWM current. When the torque reference is zero, alternatively or when the torque reference is zero and motor speed is no higher than a predetermined value, the inverter(3) is controlled to be cut off so that c ...


7
Yasufumi Ikkai, Satoshi Tamaki: Apparatus and method for limiting the speed of an electric motor. Matsushita Electric Industrial, Greenblum & Bernstein, May 26, 1998: US05757161 (24 worldwide citation)

A motor control apparatus for detecting motor overspeed in an electric car to prevent destruction of the motor and assure the safety of the vehicle. Torque control is applied when the motor speed is less than a specified rotational velocity. When the motor is detected to be operating at greater than ...


8
Yasufumi Ikkai, Satoshi Tamaki: Motor control circuit. Matsushita Electric Industrial, Greenblum & Bernstein, January 7, 1997: US05592355 (23 worldwide citation)

When the supply current from a pulse width modulation (PWM) inverter drive circuit supplying current to the motor in an electric-powered motor vehicle is an overcurrent exceeding a particular current level, a monitoring circuit outputs a fail signal to disable the PWM inverter drive circuit and lowe ...


9
Yasufumi Ikkai, Satoshi Tamaki, Masaki Tagome, Mineaki Isoda, Tomokuni Iijima, Kazushige Narazaki: Motor controller. Matsushita Electric Industrial, Greenblum & Bernstein, July 13, 1999: US05923728 (21 worldwide citation)

A motor controller comprises a stator current production unit for producing stator current commands that are command values for the stator current flowing through the stator windings, a drive unit for supplying electric power to the stator windings based on the stator current commands, a stator curr ...


10
Tomokuni Iijima, Kazushige Narazaki, Yoshiaki Igarashi, Satoshi Tamaki, Masaki Tagome, Mineaki Isoda: Motor controller. Matsushita Electric Industrial, Panitch Schwarze Jacobs & Nadel P C, August 10, 1999: US05936378 (20 worldwide citation)

A motor controller comprising drive unit for supplying power to the stator windings of a motor based on a current command, a stator current detection unit for detecting the stator current flowing in the stator windings, a saturation degree production unit for producing the saturation degree data ind ...