Patents by Inventor Koki YAMANOKUCHI

Koki YAMANOKUCHI 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).

  • Electronic circuit and wireless power transmission device
    Patent number: 11316437
    Abstract: An electronic circuit to receive input AC signals having different phases, and to control bidirectional switches corresponding to phases to generate, based on input AC signals having the phases, output AC signals having the phases and having a frequency different from a frequency of the input AC signals, the electronic circuit has reference signal circuitry to generate a reference signal having a frequency higher than the frequency of the output AC signals, and a commutation circuitry to control switching between voltage commutation and current commutation, wherein, in the voltage commutation, the commutation circuitry switches the bidirectional switches corresponding to the phases in sequence based on a voltage level of the output AC signals of the phases before and after a time point when an amplitude of the reference signal becomes a specific amplitude value, and in the current commutation, the commutation circuitry switches the bidirectional switches in parallel.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: April 26, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Jun-ichi Itoh, Keisuke Kusaka, Shunsuke Takuma, Koki Yamanokuchi, Shuichi Obayashi, Yasuhiro Kanekiyo
  • ELECTRONIC CIRCUIT AND WIRELESS POWER TRANSMISSION DEVICE
    Publication number: 20210036625
    Abstract: An electronic circuit to receive input AC signals having different phases, and to control bidirectional switches corresponding to phases to generate, based on input AC signals having the phases, output AC signals having the phases and having a frequency different from a frequency of the input AC signals, the electronic circuit has reference signal circuitry to generate a reference signal having a frequency higher than the frequency of the output AC signals, and a commutation circuitry to control switching between voltage commutation and current commutation, wherein, in the voltage commutation, the commutation circuitry switches the bidirectional switches corresponding to the phases in sequence based on a voltage level of the output AC signals of the phases before and after a time point when an amplitude of the reference signal becomes a specific amplitude value, and in the current commutation, the commutation circuitry switches the bidirectional switches in parallel.
    Type: Application
    Filed: July 31, 2020
    Publication date: February 4, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Jun-ichi ITOH, Keisuke KUSAKA, Shunsuke TAKUMA, Koki YAMANOKUCHI, Shuichi OBAYASHI, Yasuhiro KANEKIYO