Patents by Inventor Tomohira TAKAHASHI

Tomohira TAKAHASHI 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).

  • Publication number: 20200295694
    Abstract: A rotating electric machine apparatus including: a rotating electric machine (REM) including a rotor and a stator; an inverter device including an inverter circuit (IC) for driving the REM and an inverter control unit (ICU) for controlling the IC; a detector, in which a first antenna is connected to a resonance circuitry, which is mounted to the REM and has a resonance characteristic that changes depending on a change in a physical quantity; and a detection processor receiving a response radio wave indicating a detection result of the change in the physical quantity from the first antenna while transmitting a transmission radio wave at a set carrier frequency from a second antenna, and comparing the detection result and the set value, to thereby obtain an abnormal state in the REM. The ICU controls output of the IC in accordance with an abnormal state signal from the detection processor.
    Type: Application
    Filed: November 24, 2017
    Publication date: September 17, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshihiro MIYAMA, Hideaki ARITA, Junji HORI, Tomohira TAKAHASHI, Kenzo MAKINO, Masaya INOUE
  • Publication number: 20200274411
    Abstract: A rotary electric machine including a rotor including a rotor core; permanent magnets to be embedded in the rotor core; and a one end-side end plate configured to support one end side of the rotor core. The rotor core has rotor refrigerant passages through which refrigerant for cooling the permanent magnets flows in an axial direction of the shaft. The one end-side end plate has an end plate refrigerant passage communicating with the rotor refrigerant passages. The end plate refrigerant passage has refrigerant reservoirs, each projecting to an outer side in a radial direction of the shaft.
    Type: Application
    Filed: February 28, 2018
    Publication date: August 27, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yusuke KIMOTO, Junji KITAO, Tomohira TAKAHASHI, Yoshihiro MIYAMA, Junichi NAKAZONO
  • Publication number: 20200220398
    Abstract: A rotor of the permanent magnet rotating electric machine includes a rotor core, a plurality of magnets, and magnetic slits. Each of the magnetic slits is formed in a core region being a region between magnets of the plurality of magnets, and a gap. The magnetic slits are regions having a lower magnetic permeability than a magnetic permeability of the core region. One end of each of the magnetic slits, which is closer to an outer periphery of the rotor, is positioned in a portion of the core region on the same direction side as a direction of a force in a circumferential direction of the rotor, and another end closer to the rotation axis center of the rotor is positioned on the magnetic pole center or in a portion of the core region on a side opposite to the direction of the force.
    Type: Application
    Filed: July 6, 2018
    Publication date: July 9, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomohira TAKAHASHI, Junji KITAO, Yoshihiro MIYAMA, Masatsugu NAKANO, Kosho YAMANE
  • Publication number: 20200186007
    Abstract: In a rotating electric machine, a rotor core has a rotor core cooling hole under a state of being coupled to a first gap at a position on a radially inner side with respect to a center portion of a first inner wall surface in a length direction. The rotor core has a radially-outer-side refrigerant flow path formed under a state of being coupled to a radially-outer-side end portion of the first gap. A first end plate has a communication path formed so as to extend from an inner end surface of the first end plate to the rotor core cooling hole. A second end plate has a discharge path formed so as to allow the radially-outer-side refrigerant flow path to communicate with an outside.
    Type: Application
    Filed: February 26, 2018
    Publication date: June 11, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Junji KITAO, Tomohira TAKAHASHI, Yusuke KIMOTO, Yoshihiro MIYAMA, Masatsugu NAKANO, Yuya TANAKA