Patents by Inventor Ichiro Masago

Ichiro Masago 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: 6104117
    Abstract: In the permanent magnet motor of the present invention, where P is an integer not smaller than one, the number of magnetic poles of a rotor (22) is set to 2P, and the number of salient poles of a stator field core (21) is set to 3P. The salient pole section (21a) of each stator field core (21) is provided with two supplemental grooves (24). A salient pole magnetic interpolar angle is 4.theta., such that two supplemental grooves (24) of each salient pole section (21a) are arranged in positions at angles of .theta. and 3.theta. with respect to the center of a winding slot (27) in the circumferential direction of the rotor. With this structure, a fundamental wave component of a clogging torque is removed and a permanent magnet motor having a low clogging torque is provided.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: August 15, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tomokazu Nakamura, Ichiro Masago, Koichi Uchida