Patents by Inventor Thomas A. Brooks

Thomas A. Brooks 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).

  • Single-stage power factor correction method to reduce energy storage capacitor voltage and circuit for same
    Patent number: 6751104
    Abstract: A DC-to-DC converter is coupled to an AC source comprising a rectifier bridge. An input inductor is coupled to the output of the rectifier stage. An auxiliary winding is coupled to the input inductor. The auxiliary winding is characterized by a first number of turns. A storage capacitor is coupled to the auxiliary winding. An output transformer is coupled to the auxiliary winding. A first switch is coupled in series with the primary of the output transformer. The first switch and primary are coupled in parallel with the storage capacitor to the auxiliary winding. The number of turns of the auxiliary is less than the number of turns of the primary so that voltage across the storage capacitor is reduced without load carrying capacity of the DC-to-DC converter.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: June 15, 2004
    Assignee: The Regents of the University of California
    Inventors: Chongming Qiao, Keyue M. Smedley, Thomas A. Brooks, Tetsuhiko Shimpo