Patents by Inventor David Mark Stuebner

David Mark Stuebner 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).

  • Conversion of synchronous generator to synchronous condenser
    Patent number: 8754615
    Abstract: An approach for converting a synchronous generator to a synchronous condenser is disclosed. In one aspect, a variable frequency driver is used to provide a starting power source to accelerate a synchronous generator decoupled from a turbine to an operational speed to act as a synchronous condenser. In another aspect, the synchronous condenser can be recoupled back to the turbine to form the synchronous generator.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: June 17, 2014
    Assignee: General Electric Company
    Inventors: James Michael Fogarty, Gary Edward Gottung, David Mark Stuebner
  • CONVERSION OF SYNCHRONOUS GENERATOR TO SYNCHRONOUS CONDENSER
    Publication number: 20120306458
    Abstract: An approach for converting a synchronous generator to a synchronous condenser is disclosed. In one aspect, a variable frequency driver is used to provide a starting power source to accelerate a synchronous generator decoupled from a turbine to an operational speed to act as a synchronous condenser. In another aspect, the synchronous condenser can be recoupled back to the turbine to form the synchronous generator.
    Type: Application
    Filed: June 1, 2011
    Publication date: December 6, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: James Michael Fogarty, John Noel Cunningham, Gary Edward Gottung, David Mark Stuebner
  • Steam turbine controller having method and apparatus for providing variable frequency regulation
    Patent number: 6250877
    Abstract: In a preferred embodiment, the invention relates to a steam turbine having a speed-loop droop governor with two load-frequency error gains (droops). The first gain (fast change) may be a conventional high gain that is used for power loads that have a constant frequency. When using only the first gain, the high rate of the first gain causes the droop governor to shut off steam to the turbine if the speed of the turbine drifts above a narrow speed range centered on the rated speed set-point. The second gain (slow change) is a low gain that causes the droop governor to tolerate a wide range of turbine speeds about the rated speed set-point.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: June 26, 2001
    Assignee: General Electric Co.
    Inventors: Bernd Artur Karl Westphal, David Mark Stuebner