Patents by Inventor Yuuta Gotou

Yuuta Gotou 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 apparatus including short-circuit judgment unit for capacitor of DC link unit
    Patent number: 10554165
    Abstract: A motor drive apparatus includes a converter configured to convert AC power of an AC power supply into DC power and outputs the DC power, a DC link unit including capacitors connected in series with each other, an inverter connected in parallel with the DC link unit, and configured to convert the DC power of the DC link unit into AC power for driving a motor, and outputs the AC power, and a short-circuit judgment unit configured to judge that at least one of the capacitors in the DC link unit has shorted in the case where, when the value of a voltage applied to a positive and negative bipolar terminal of the DC link unit is smaller than a first threshold, the value of an input current flowing from the AC power supply into the DC link unit via the converter is larger than a second threshold.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: February 4, 2020
    Assignee: FANUC CORPORATION
    Inventors: Yuuta Gotou, Yasuyuki Matsumoto, Masaya Tateda
  • MOTOR DRIVE APPARATUS INCLUDING SHORT-CIRCUIT JUDGMENT UNIT FOR CAPACITOR OF DC LINK UNIT
    Publication number: 20190245474
    Abstract: A motor drive apparatus includes a converter configured to convert AC power of an AC power supply into DC power and outputs the DC power, a DC link unit including capacitors connected in series with each other, an inverter connected in parallel with the DC link unit, and configured to convert the DC power of the DC link unit into AC power for driving a motor, and outputs the AC power, and a short-circuit judgment unit configured to judge that at least one of the capacitors in the DC link unit has shorted in the case where, when the value of a voltage applied to a positive and negative bipolar terminal of the DC link unit is smaller than a first threshold, the value of an input current flowing from the AC power supply into the DC link unit via the converter is larger than a second threshold.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Inventors: Yuuta GOTOU, Yasuyuki MATSUMOTO, Masaya TATEDA