Patents by Inventor Akihoko Kanouda

Akihoko Kanouda 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).

  • Driving circuit for a switching element including an improved power supply arrangement
    Patent number: 5216349
    Abstract: The switching of upper and lower switching elements is controlled by respective upper and lower arm driving circuits. Those switching elements are connected in series across a primary d.c. power source and their successive switching generates a drive voltage which is applied to a load. A secondary d.c. power source is connected to the lower arm driving circuit while the upper arm driving circuit is connected to a capacitor connected to the high potential side of the primary d.c. power source. The capacitor is charged from the secondary d.c. power source through a charging circuit. This driving arrangement is particularly applicable to multi-phase driving circuits.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: June 1, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Akihoko Kanouda, Hideki Miyazaki, Kozo Watanabe, Kenichi Onda, Yasuo Matsuda