Patents by Inventor Takeshi ARIMATSU

Takeshi ARIMATSU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Motor control apparatus and method for controlling motor
    Patent number: 8716972
    Abstract: A motor control apparatus includes a power converter, a speed controller, and a stop position controller. The power converter outputs a current to drive a motor based on a torque command. The speed controller generates the torque command based on an error between a speed command of the motor and a speed of the motor. The stop position controller calculates an acceleration command to output a predetermined torque after detection of a reference position per revolution of a position detector for a first time during speed control of the motor, generates a torque feed-forward command based on the acceleration command, generates a position command based on the acceleration command, and generates the speed command based on an error between the position command and the motor position to execute position control of the motor.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: May 6, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Seitaro Ohta, Jun Hagihara, Takeshi Arimatsu
  • MOTOR CONTROL APPARATUS AND METHOD FOR CONTROLLING MOTOR
    Publication number: 20120229069
    Abstract: A motor control apparatus includes a power converter, a speed controller, and a stop position controller. The power converter outputs a current to drive a motor based on a torque command. The speed controller generates the torque command based on an error between a speed command of the motor and a speed of the motor. The stop position controller calculates an acceleration command to output a predetermined torque after detection of a reference position per revolution of a position detector for a first time during speed control of the motor, generates a torque feed-forward command based on the acceleration command, generates a position command based on the acceleration command, and generates the speed command based on an error between the position command and the motor position to execute position control of the motor.
    Type: Application
    Filed: November 4, 2011
    Publication date: September 13, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Seitaro OHTA, Jun HAGIHARA, Takeshi ARIMATSU