Patents by Inventor Sotoo Asano

Sotoo Asano 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 with means for compensating ripple torque
    Patent number: 4751415
    Abstract: A brushless DC motor comprising a stator with plural exciting windings and a rotor made of a permanent magnet is provided with a compensation winding wound in the stator and compensation magnetic poles disposed on the rotor such that a torque which is generated between the compensation winding and the compensation magnetic poles of the rotor may eliminate fluctuation of the torque generated by interaction of the exciting windings of the stator and the main magnet of the rotor.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: June 14, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Teruaki Kitamori, Sotoo Asano