Patents by Inventor Ryusuke KOMIYA

Ryusuke KOMIYA 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).

  • Power conversion device with selective voltage control
    Patent number: 11070143
    Abstract: A power conversion device includes a power conversion circuitry configured to convert DC power into AC power by switching on/off a plurality of switching elements to switch each of a plurality of phase voltages to a voltage level selected from one of three levels including a first voltage, a second voltage higher than the first voltage, and a third voltage higher than the second voltage. A control circuitry is configured to control the plurality of switching elements so as to convert DC power into AC power without producing a combination of the first voltage and the third voltage between any two phases of the plurality of phase voltages.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: July 20, 2021
    Inventors: Ryusuke Komiya, Shinichi Akimoto, Hiroyuki Imayoshi, Mitsunori Sato, Toshihiro Hanada
  • POWER CONVERSION DEVICE AND CONTROL METHOD
    Publication number: 20200044579
    Abstract: A power conversion device includes a power conversion circuitry configured to convert DC power into AC power by switching on/off a plurality of switching elements to switch each of a plurality of phase voltages to a voltage level selected from one of three levels including a first voltage, a second voltage higher than the first voltage, and a third voltage higher than the second voltage. A control circuitry is configured to control the plurality of switching elements so as to convert DC power into AC power without producing a combination of the first voltage and the third voltage between any two phases of the plurality of phase voltages.
    Type: Application
    Filed: July 31, 2019
    Publication date: February 6, 2020
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Ryusuke KOMIYA, Shinichi AKIMOTO, Hiroyuki IMAYOSHI, Mitsunori SATO, Toshihiro HANADA