Patents by Inventor Tomofumi Takahashi

Tomofumi 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).

  • Brushless DC motor and method of manufacturing brushless DC motor
    Publication number: 20020140308
    Abstract: A brushless DC motor including a stator having plural slots; and a rotor which has plural permanent magnets and is divided into three rotor blocks in a rotation axis direction, the three rotor blocks being layered so that the arrangement angles of the rotor blocks differ from each other by an amount of a mechanical angle in a rotary direction that is equivalent to one third of a pulsation period of cogging torque generated by the rotor and stator. A brushless DC motor including a rotor having plural magnetic poles provided at an equal pitch in a circumferential direction by mounting permanent magnets in magnet mounting holes; and a stator having plural slots arranged at an equal pitch in a circumferential direction.
    Type: Application
    Filed: February 6, 2002
    Publication date: October 3, 2002
    Applicant: KOYO SEIKO CO. LTD.
    Inventors: Hirohide Inayama, Hideki Jonokuchi, Sadaaki Mori, Atsushi Ishihara, Tomofumi Takahashi, Minoru Kitabayashi, Tetsuo Horie