Patents by Inventor Jyun Sawaki

Jyun Sawaki 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).

  • Motor controller and motor controlling method
    Patent number: 7276869
    Abstract: In a case where a motor cannot follow up a position designated by a position instruction in a velocity operation mode, when an operation is performed in a constant power operating region, or when a voltage is saturated, a limit is put on a position deviation in a motor control apparatus. A correction position deviation amount, by which the motor cannot follow up the position instruction, is subtracted from the position deviation. Further, a motor position-within-one-revolution deviation in the subtracted correction position deviation amount is corrected in a region in which the characteristic of torque is improved. Consequently, the followingness of the motor to the motor position-within-one-revolution in the position designated by the position instruction is ensured.
    Type: Grant
    Filed: June 11, 2004
    Date of Patent: October 2, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuhiko Tsutsui, Jyun Sawaki
  • Motor controller and motor controlling method
    Publication number: 20060279241
    Abstract: In a case where a motor cannot follow up a position designated by a position instruction in a velocity operation mode, when an operation is performed in a constant power operating region, or when a voltage is saturated, a limit is put on a position deviation in a motor control apparatus. A correction position deviation amount, by which the motor cannot follow up the position instruction, is subtracted from the position deviation. Further, a motor position-within-one-revolution deviation in the subtracted correction position deviation amount is corrected in a region in which the characteristic of torque is improved. Consequently, the followingness of the motor to the motor position-within-one-revolution in the position designated by the position instruction is ensured.
    Type: Application
    Filed: June 11, 2004
    Publication date: December 14, 2006
    Inventors: Kazuhiko Tsutsui, Jyun Sawaki