Patents by Inventor Rodney Alen Lawson

Rodney Alen Lawson 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).

  • Full thyristor bridge circuit with free wheeling diode for de-excitation control and stability sensing
    Patent number: 6442051
    Abstract: A circuit is provided for use in a synchronous generator excitation system. The circuit comprises a three-phase bridge having six legs. The bridge is connected with an AC power supply. A thyristor is provided in each of the six legs, wherein the thyristors provide a path for a device current. A free wheeling diode functions as a de-excitation means connected in parallel with the three-phase bridge. The free wheeling diode provides a discharge path for a field current.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: August 27, 2002
    Assignee: General Electric Company
    Inventors: Michael John Ryan, Mohammed Kassem Saleh, Rodney Alen Lawson, John Earl Bittner