Patents by Inventor Nobukazu Takashima

Nobukazu Takashima 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).

  • Control device for system interconnection inverter
    Patent number: 5537307
    Abstract: A control device for a system interconnection inverter. The control device includes an active/reactive current reference generator and an active/reactive current detector for detecting an output AC current of the inverter. The control device further includes a phase detector, a frequency detector, and a voltage amplitude detector of the AC voltage of the inverter. The control device also includes a frequency reference generator and a voltage amplitude reference generator. The control device also includes a frequency correction computing circuit and a voltage amplitude correction computing circuit. The control device further includes an adder for adding the active current reference signal and the voltage amplitude correction signal to output as an active current correction reference signal, and for adding the reactive current reference signal and the frequency correction signal to output as a reactive current correction signal.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: July 16, 1996
    Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Company, Incorporated
    Inventors: Syunichi Hirose, Nobukazu Takashima, Susumu Tanaka, Tatsuro Yamaguchi, Hidetaka Sato, Minoru Abe, Masahito Ooyama