Patents by Inventor Sadanao BABA

Sadanao BABA 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).

  • Electric power steering system
    Patent number: 9849908
    Abstract: An assist command value calculation circuit includes a torque shift control circuit, a phase lag compensation control circuit, a basic assist control circuit, and a phase lead compensation control circuit. A determination circuit determines whether a motor has been continuously under high load or not based on a current command value and a current limit value. The determination circuit determines whether the motor has been continuously under high load or not by comparing the current command value with the current limit value and comparing a basic assist controlled variable with the current limit value, and outputs a phase compensation restriction flag. The phase lag compensation control circuit and the phase lead compensation control circuit restrict phase restriction when the phase compensation restriction flag is ON, and continues phase compensation when the phase compensation restriction flag is OFF.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: December 26, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Yoshihiro Itatsu, Sadanao Baba
  • ELECTRIC POWER STEERING SYSTEM
    Publication number: 20160288822
    Abstract: An assist command value calculation circuit includes a torque shift control circuit, a phase lag compensation control circuit, a basic assist control circuit, and a phase lead compensation control circuit. A determination circuit determines whether a motor has been continuously under high load or not based on a current command value and a current limit value. The determination circuit determines whether the motor has been continuously under high load or not by comparing the current command value with the current limit value and comparing a basic assist controlled variable with the current limit value, and outputs a phase compensation restriction flag. The phase lag compensation control circuit and the phase lead compensation control circuit restrict phase restriction when the phase compensation restriction flag is ON, and continues phase compensation when the phase compensation restriction flag is OFF.
    Type: Application
    Filed: March 25, 2016
    Publication date: October 6, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Yoshihiro ITATSU, Sadanao BABA