Patents Assigned to Canon Seki Kabushiki Kaisha
  • Brushless motor
    Patent number: 4866324
    Abstract: The present invention relates to a brushless motor which utilizes part of the motor housing, which is formed by a plastic mixed with particles or fibers of a magnetic material, as a stator yoke.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: September 12, 1989
    Assignees: Canon Kabushiki Kaisha, Canon Seki Kabushiki Kaisha
    Inventors: Suezo Yuzawa, Masafumi Yamakawa, Takao Shibayama
  • Drive circuit for stepping motor
    Patent number: 4857817
    Abstract: In this invention, an excitation current is switched in accordance with a change in number of phases so as to reduce an excitation current per phase in a 2-phase mode to be smaller than that in a 1-phase mode. The excitation current in the 2-phase mode is set to be about 0.6 to 0.8 times larger than that in the 1-phase mode, so that a constant torque is always generated.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: August 15, 1989
    Assignees: Canon Kabushiki Kaisha, Canon Seki Kabushiki Kaisha
    Inventor: Michihiro Kugioka