Patents by Inventor Itsuki SHIMURA

Itsuki SHIMURA 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).

  • Rotary electric machine and in-vehicle motor system
    Patent number: 12107470
    Abstract: A rotary electric machine includes a stator including a coil, and a rotor in an inner peripheral side of the stator. The rotor core comprises a soft magnetic metal and a magnet within a magnet insertion hole, a first magnet stopper on a q axis side of the magnet in the magnet insertion hole, a magnet accommodation between the first magnet stopper on both sides of the magnet insertion hole, a first space portion communicating with the magnet insertion hole, a second space portion whose distance from the magnet is equal to or less than a thickness of the magnet and a radial length of a magnetic pole center is long, the second space portion formed on an inner peripheral side relative to the magnet, and a third space portion that has a convex shape on an inner peripheral side of a q axis of the magnet.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: October 1, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Kazutami Tago, Itsuki Shimura, Junnosuke Nakatsugawa, Wataru Yokoyama, Ippei Suzuki
  • ROTARY ELECTRIC MACHINE AND IN-VEHICLE MOTOR SYSTEM
    Publication number: 20230024138
    Abstract: A rotary electric machine includes a stator including a coil, and a rotor in an inner peripheral side of the stator. The rotor core comprises a soft magnetic metal and a magnet within a magnet insertion hole, a first magnet stopper on a q axis side of the magnet in the magnet insertion hole, a magnet accommodation between the first magnet stopper on both sides of the magnet insertion hole, a first space portion communicating with the magnet insertion hole, a second space portion whose distance from the magnet is equal to or less than a thickness of the magnet and a radial length of a magnetic pole center is long, the second space portion formed on an inner peripheral side relative to the magnet, and a third space portion that has a convex shape on an inner peripheral side of a q axis of the magnet.
    Type: Application
    Filed: December 15, 2020
    Publication date: January 26, 2023
    Applicant: Hitachi Astemo, Ltd.
    Inventors: Kazutami TAGO, Itsuki SHIMURA, Junnosuke NAKATSUGAWA, Wataru YOKOYAMA, Ippei SUZUKI