Patents by Inventor Kentaro Ol

Kentaro Ol 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).

  • Torque Controller for Permanent Magnet Synchronous Motor
    Publication number: 20100231148
    Abstract: When output voltage V1 of an electric power converter reaches a prescribed voltage V1*ref, a difference between V1 and V1*ref is integrated to correct a commanded torque to ?o* (?*=?o*+??).
    Type: Application
    Filed: February 18, 2010
    Publication date: September 16, 2010
    Applicant: Hitachi Car Engineering Co., Ltd.
    Inventors: Kazuaki TOBARI, Shigehisa Aoyagi, Kentaro Ol
  • Field weakening control apparatus for permanent magnet motor and electric power steering using same
    Publication number: 20080265809
    Abstract: A motor control apparatus which controls an output voltage reference for an inverter driving a permanent magnet synchronous motor based on d-axis and q-axis current references, d-axis and q-axis current detected values, and a computed frequency value. When a torque reference specifying torque greater than maximum torque that the motor can output is input, a limit value for a phase angle that is a deviation between a rotation phase reference of control and a rotation phase value of the motor is varied depending on a quantity of the predetermined state.
    Type: Application
    Filed: April 24, 2008
    Publication date: October 30, 2008
    Inventors: Kentaro Ol, Kazuaki Tobari, Yoshitaka Iwaji, Mitsuo Sasaki, Tatsuo Matsumura