Patents by Inventor Masahiro Nigo

Masahiro Nigo 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).

  • Permanent magnet motor, hermetic compressor, and fan motor
    Patent number: 8714948
    Abstract: An object is to provide a permanent magnet motor that highly reduces torque fluctuation, thereby reducing noise and vibration. The permanent magnet motor may be formed as follows: a length D of a permanent magnet 8 in a longitudinal direction is the same as or longer than a width A between sides of the magnetic pole tooth 3 in the circumferential direction in an end portion of the magnetic pole tooth 3, and a distance C between tip portions of a pair of the first slits 13a and 13b within the same pole is smaller than the width A between the sides of the magnetic pole tooth 3 in the circumferential direction in the end portion of the magnetic pole tooth 3. The permanent magnet motor, thus formed, may be characterized in that cut surfaces 12 face the first slits 13a and 13b.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: May 6, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhiko Baba, Hayato Yoshino, Koji Yabe, Masahiro Nigo, Koji Masumoto, Tomoaki Oikawa, Yoshio Takita
  • PERMANENT MAGNET MOTOR, HERMETIC COMPRESSOR, AND FAN MOTOR
    Publication number: 20100119390
    Abstract: An object is to provide a permanent magnet motor that highly reduces torque fluctuation, thereby reducing noise and vibration. The permanent magnet motor may be formed as follows: a length D of a permanent magnet 8 in a longitudinal direction is the same as or longer than a width A between sides of the magnetic pole tooth 3 in the circumferential direction in an end portion of the magnetic pole tooth 3, and a distance C between tip portions of a pair of the first slits 13a and 13b within the same pole is smaller than the width A between the sides of the magnetic pole tooth 3 in the circumferential direction in the end portion of the magnetic pole tooth 3. The permanent magnet motor, thus formed, may be characterized in that cut surfaces 12 face the first slits 13a and 13b.
    Type: Application
    Filed: February 26, 2007
    Publication date: May 13, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuhiko Baba, Hayato Yoshino, Koji Yabe, Masahiro Nigo, Koji Masumoto, Tomoaki Oikawa, Yoshio Takita