Patents by Inventor Phep X. Nguyen

Phep X. Nguyen 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).

  • Drive and control circuit for a brushless DC motor
    Patent number: 5309076
    Abstract: The present invention provides a drive and control circuit for a single phase, brushless DC motor. The drive and control circuit includes an integrated circuit having a maximum rated voltage lower than the maximum net voltage of the overall circuit. Internal transistors in the integrated circuit are used to drive the emitters of two external power transistors which are connected to the windings of the DC motor. In this manner, a relatively inexpensive integrated circuit can be used to drive and control a DC motor having a much higher operating voltage.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: May 3, 1994
    Assignee: Nidec Corporation
    Inventors: Elmer W. Madsen, Phep X. Nguyen