Patents by Inventor Shigeki HANYUU

Shigeki HANYUU 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 drive device suppressing voltage fluctuation in DC link capacitor
    Patent number: 10727775
    Abstract: To provide a motor drive device that suppresses voltage fluctuation of a DC link capacitor, as well as enabling for low cost and size reduction. A motor control unit sets a threshold of voltage at which to start regeneration to a first threshold in a case of an increased amount per unit time of a DC voltage value detected by a voltage detection part being less than a certain amount, and sets the threshold of voltage at which to start regeneration to a second threshold that is larger than the first threshold, in a case of the increased amount per unit time of the DC voltage value detected by the voltage detection part being at least a certain amount.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: July 28, 2020
    Assignee: FANUC CORPORATION
    Inventors: Tomokazu Yoshida, Kiichi Inaba, Shigeki Hanyuu
  • MOTOR DRIVE DEVICE SUPPRESSING VOLTAGE FLUCTUATION IN DC LINK CAPACITOR
    Publication number: 20170302213
    Abstract: To provide a motor drive device that suppresses voltage fluctuation of a DC link capacitor, as well as enabling for low cost and size reduction. A motor control unit sets a threshold of voltage at which to start regeneration to a first threshold in a case of an increased amount per unit time of a DC voltage value detected by a voltage detection part being less than a certain amount, and sets the threshold of voltage at which to start regeneration to a second threshold that is larger than the first threshold, in a case of the increased amount per unit time of the DC voltage value detected by the voltage detection part being at least a certain amount.
    Type: Application
    Filed: April 5, 2017
    Publication date: October 19, 2017
    Inventors: Tomokazu YOSHIDA, Kiichi INABA, Shigeki HANYUU