Patents by Inventor Yuuken Okano

Yuuken Okano 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).

  • Operation control method and operation control apparatus for variable speed generator-motor
    Patent number: 8115445
    Abstract: An excitation device supplies a three-phase AC excitation current to a variable speed generator-motor, and controls the variable speed generator-motor based on a three-phase AC excitation current command value obtained by vector-synthesizing, based on a slip phase from an exciting phase detector, a torque direction excitation current command value from a power adjustment computing device, and a magnetic flux direction excitation current command value from a voltage adjustment computing device by an excitation current adjustment computing device.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: February 14, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Oyake, Yuuken Okano, Yutaka Kimura
  • OPERATION CONTROL METHOD AND OPERATION CONTROL APPARATUS FOR VARIABLE SPEED GENERATOR-MOTOR
    Publication number: 20100090641
    Abstract: An excitation device supplies a three-phase AC excitation current to a variable speed generator-motor, and controls the variable speed generator-motor based on a three-phase AC excitation current command value obtained by vector-synthesizing, based on a slip phase from an exciting phase detector, a torque direction excitation current command value from a power adjustment computing device, and a magnetic flux direction excitation current command value from a voltage adjustment computing device by an excitation current adjustment computing device.
    Type: Application
    Filed: October 7, 2009
    Publication date: April 15, 2010
    Inventors: Takashi OYAKE, Yuuken Okano, Yutaka Kimura