Patents by Inventor Naganori Onitsuka

Naganori Onitsuka 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).

  • Excitation control apparatus for synchronous machine
    Patent number: 4714869
    Abstract: Before a synchronous machine is connected with a line, the set value of a voltage setter is controlled so that the difference between the line voltage and the set value of the voltage setter is decreased to zero, and a field current is then controlled so that the difference between the set value and the output voltage of the synchronous machine is decreased to zero, thereby parallel-connecting the synchronous machine with the line.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: December 22, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Naganori Onitsuka