Patents by Inventor Shigeki Katsumata

Shigeki Katsumata 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).

  • Signal control device
    Patent number: 8378729
    Abstract: A signal control device controls the period of a three-phase signal used to control a three-phase high-voltage converter. An arithmetic unit of the signal control device determines a timing for changing the period for each phase so that the period of the signal for a V phase or a W phase is changed at the point when the phase difference between a U phase and the V or W phase reaches a prescribed phase difference after the period of the signal for the U phase has been changed. A control unit performs control such that the signal period for each phase is changed at the timing determined by the arithmetic unit.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: February 19, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yukio Onishi, Shigeki Katsumata
  • SIGNAL CONTROL DEVICE
    Publication number: 20110057701
    Abstract: A signal control device controls the period of a three-phase signal used to control a three-phase high-voltage converter. An arithmetic unit of the signal control device determines a timing for changing the period for each phase so that the period of the signal for a V phase or a W phase is changed at the point when the phase difference between a U phase and the V or W phase reaches a prescribed phase difference after the period of the signal for the U phase has been changed. A control unit performs control such that the signal period for each phase is changed at the timing determined by the arithmetic unit.
    Type: Application
    Filed: June 2, 2009
    Publication date: March 10, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukio Onishi, Shigeki Katsumata