Patents by Inventor Hajime Komiyama

Hajime Komiyama 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).

  • Wind turbine and operating method thereof
    Patent number: 8116914
    Abstract: A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: February 14, 2012
    Assignees: Hitachi, Ltd., Fuji Heavy Industries Ltd.
    Inventors: Shinya Oohara, Masaya Ichinose, Motoo Futami, Kazuya Tsutsumi, Takashi Shiraishi, Shigeo Yoshida, Hajime Komiyama, Junichi Sugino
  • WIND TURBINE AND OPERATING METHOD THEREOF
    Publication number: 20080069692
    Abstract: A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.
    Type: Application
    Filed: August 20, 2007
    Publication date: March 20, 2008
    Inventors: SHINYA OOHARA, Masaya Ichinose, Motoo Futami, Kazuya Tsutsumi, Takashi Shiraishi, Shigeo Yoshida, Hajime Komiyama, Junichi Sugino