Patents by Inventor Aiko HIGUCHI

Aiko HIGUCHI 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).

  • Drive unit and transport machine
    Patent number: 9543878
    Abstract: A drive unit includes: an inverter; an electric motor that has a first winding connected to an output part of the inverter and a second winding connected to the first winding; a first semiconductor switch that has a first end connected to the first winding and a second end connected to the second winding; a second semiconductor switch that has a first end and a second end connected to the first winding and the first semiconductor switch; and a snubber circuit that is provided between the second end of the first semiconductor switch and the first end of the second semiconductor switch and has a capacitor and a diode.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: January 10, 2017
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tomohiko Sanada, Koji Higashikawa, Tasuku Isobe, Aiko Higuchi, Fumiaki Ikeda, Kenji Yamada
  • DRIVE UNIT AND TRANSPORT MACHINE
    Publication number: 20160233811
    Abstract: A drive unit includes: an inverter; an electric motor that has a first winding connected to an output part of the inverter and a second winding connected to the first winding; a first semiconductor switch that has a first end connected to the first winding and a second end connected to the second winding; a second semiconductor switch that has a first end and a second end connected to the first winding and the first semiconductor switch; and a snubber circuit that is provided between the second end of the first semiconductor switch and the first end of the second semiconductor switch and has a capacitor and a diode.
    Type: Application
    Filed: February 3, 2016
    Publication date: August 11, 2016
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tomohiko SANADA, Koji HIGASHIKAWA, Tasuku ISOBE, Aiko HIGUCHI, Fumiaki IKEDA, Kenji YAMADA