Patents by Inventor Tsuyoshi MORIMITSU

Tsuyoshi MORIMITSU 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).

  • Patent number: 12077196
    Abstract: A variable-gauge train control apparatus includes an inverter that collectively controls the torque of main motors; and a voltage control unit that controls an output voltage of the inverter. When at least one of axles to be driven by the main motors is within the gauge conversion section and at least one of the axles is located outside the gauge conversion section, the voltage control unit treats, as a reference frequency, a value obtained by conversion of an average value of rotational frequencies of the axles located outside the gauge conversion section into the electric angular frequencies of the main motors, and adds up a slip frequency command and the reference frequency to provide the frequency of the output voltage of the inverter.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: September 3, 2024
    Assignees: MITSUBISHI ELECTRIC CORPORATION, KYUSHU RAILWAY COMPANY
    Inventors: Kohei Fujitani, Shinsuke Kadoi, Tsuyoshi Morimitsu, Yuichi Mimura, Soichiro Watanabe
  • Patent number: 11975613
    Abstract: A variable-gauge train control apparatus for a variable-gauge train having a gauge variable in a gauge conversion section includes: a plurality of main motors that transmits driving force to axles and wheels; a plurality of inverters that outputs voltage to at least one of the main motors; and voltage control units that control the individual output voltages of the plurality of inverters. Each of the voltage control units corresponds to one of the inverters and, when at least one of the axles to be subjected to the driving force controlled by the corresponding one inverter is within the gauge conversion section, controls the speed of the associated main motors by using, as a speed command value, a train speed converted into a rotational frequency.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: May 7, 2024
    Assignees: MITSUBISHI ELECTRIC CORPORATION, KYUSHU RAILWAY COMPANY
    Inventors: Kohei Fujitani, Shinsuke Kadoi, Tsuyoshi Morimitsu, Yuichi Mimura, Soichiro Watanabe
  • Publication number: 20220048544
    Abstract: A variable-gauge train control apparatus includes an inverter that collectively controls the torque of main motors; and a voltage control unit that controls an output voltage of the inverter. When at least one of axles to be driven by the main motors is within the gauge conversion section and at least one of the axles is located outside the gauge conversion section, the voltage control unit treats, as a reference frequency, a value obtained by conversion of an average value of rotational frequencies of the axles located outside the gauge conversion section into the electric angular frequencies of the main motors, and adds up a slip frequency command and the reference frequency to provide the frequency of the output voltage of the inverter.
    Type: Application
    Filed: September 11, 2018
    Publication date: February 17, 2022
    Applicants: Mitsubishi Electric Corporation, Kyushu Railway Company
    Inventors: Kohei FUJITANI, Shinsuke KADOI, Tsuyoshi MORIMITSU, Yuichi MIMURA, Soichiro WATANABE
  • Publication number: 20210339633
    Abstract: A variable-gauge train control apparatus for a variable-gauge train having a gauge variable in a gauge conversion section includes: a plurality of main motors that transmits driving force to axles and wheels; a plurality of inverters that outputs voltage to at least one of the main motors; and voltage control units that control the individual output voltages of the plurality of inverters. Each of the voltage control units corresponds to one of the inverters and, when at least one of the axles to be subjected to the driving force controlled by the corresponding one inverter is within the gauge conversion section, controls the speed of the associated main motors by using, as a speed command value, a train speed converted into a rotational frequency.
    Type: Application
    Filed: September 11, 2018
    Publication date: November 4, 2021
    Applicants: Mitsubishi Electric Corporation, KYUSHU RAILWAY COMPANY
    Inventors: Kohei FUJITANI, Shinsuke KADOI, Tsuyoshi MORIMITSU, Yuichi MIMURA, Soichiro WATANABE
  • Patent number: 10688878
    Abstract: A variable gauge train control device comprises an inverter, a location detector, and a torque calculator. The inverter collectively controls torques of main electric motors. The location detector detects an entry into a gauge changeover section. The torque calculator, upon detection by the location detector of the entry into the gauge changeover section, suspends idling control that otherwise restricts the torques of the main electric motors and calculates a first torque pattern for making the inverter operate in accordance with the torques of the main electric motors.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: June 23, 2020
    Assignees: MITSUBISHI ELECTRIC CORPORATION, KYUSHU RAILWAY COMPANY
    Inventors: Kazuki Konishi, Hidetoshi Kitanaka, Tsuyoshi Morimitsu, Yuichi Mimura, Soichiro Watanabe
  • Publication number: 20180312079
    Abstract: A variable gauge train control device comprises an inverter, a location detector, and a torque calculator. The inverter collectively controls torques of main electric motors. The location detector detects an entry into a gauge changeover section. The torque calculator, upon detection by the location detector of the entry into the gauge changeover section, suspends idling control that otherwise restricts the torques of the main electric motors and calculates a first torque pattern for making the inverter operate in accordance with the torques of the main electric motors.
    Type: Application
    Filed: July 6, 2018
    Publication date: November 1, 2018
    Applicants: MITSUBISHI ELECTRIC CORPORATION, KYUSHU RAILWAY COMPANY
    Inventors: Kazuki KONISHI, Hidetoshi KITANAKA, Tsuyoshi MORIMITSU, Yuichi MIMURA, Soichiro WATANABE