Patents by Inventor David Woodburn

David Woodburn 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).

  • Patent number: 9966888
    Abstract: A damping system can include a sensor disposed to measure an amplitude of a speed ripple of a drive shaft of a generator, and can include a feedforward circuit connected to the sensor and to the generator. The feedforward circuit can determine a phase angle formed by a load resistance and a load capacitance driven by the generator, calculate a voltage signal value based on the amplitude and the phase angle, and can adjust a DC link voltage provided by the generator and across the load resistance according to the voltage signal value.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: May 8, 2018
    Assignee: GE Aviation Systems, LLC
    Inventors: Kaiyu Wang, Paul Robert Gemin, David Woodburn
  • Publication number: 20180054145
    Abstract: A damping system can include a sensor disposed to measure an amplitude of a speed ripple of a drive shaft of a generator, and can include a feedforward circuit connected to the sensor and to the generator. The feedforward circuit can determine a phase angle formed by a load resistance and a load capacitance driven by the generator, calculate a voltage signal value based on the amplitude and the phase angle, and can adjust a DC link voltage provided by the generator and across the load resistance according to the voltage signal value.
    Type: Application
    Filed: August 22, 2016
    Publication date: February 22, 2018
    Inventors: Kaiyu Wang, Paul Robert Gemin, David Woodburn
  • Publication number: 20180054146
    Abstract: A damping system can include a sensor disposed to measure an amplitude of a speed ripple of a drive shaft of a generator, and can include a feedforward circuit connected to the sensor and to the generator. The feedforward circuit can determine a phase angle formed by a load resistance and a load capacitance driven by the generator, calculate a voltage signal value based on the amplitude and the phase angle, and can adjust a DC link voltage provided by the generator and across the load resistance according to the voltage signal value.
    Type: Application
    Filed: October 27, 2017
    Publication date: February 22, 2018
    Inventors: Kaiyu Wang, Paul Robert Gemin, David Woodburn
  • Patent number: 9899941
    Abstract: A damping system can include a sensor disposed to measure an amplitude of a speed ripple of a drive shaft of a generator, and can include a feedforward circuit connected to the sensor and to the generator. The feedforward circuit can determine a phase angle formed by a load resistance and a load capacitance driven by the generator, calculate a voltage signal value based on the amplitude and the phase angle, and can adjust a DC link voltage provided by the generator and across the load resistance according to the voltage signal value.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: February 20, 2018
    Assignee: GE AVIATION SYSTEMS, LLC
    Inventors: Kaiyu Wang, Paul Robert Gemin, David Woodburn
  • Patent number: 6741484
    Abstract: A power modulator includes a plurality of magnetic cores, at least one secondary that surrounds all of the magnetic cores, and at least one pulse generating module made up of an energy storage capacitor, switching means electronically controllable at turn-on and turn-off, a diode or an assembly of series-connected diodes connected in parallel with output conductors, and a set of single-turn or multi-turn primary windings, each set of primary windings surrounding a respective one of the plurality of magnetic cores, the sets of primary windings being connected in parallel to thereby provide a power modulator where each of the pulse generating modules drives all of the plurality of magnetic cores.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: May 25, 2004
    Assignee: ScandiNova AB
    Inventors: Walter Crewson, David Woodburn
  • Patent number: 6686596
    Abstract: A beam handling system that switches between two beam distribution systems (irradiation areas). When the first product has passed the beam, the second product starts to be irradiated in the second beam. This may be the same beam but directed in a different direction, or two separate beams, and the switching of direction is synchronized to occur as one product irradiation is completed and the second comes into position.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: February 3, 2004
    Assignee: ScandiNova AB
    Inventors: David Woodburn, Walter Crewson
  • Patent number: 6617586
    Abstract: A beam delivery system uses a set of electronically controlled magnets with a common magnetic yoke to steer the beam directly onto the products being irradiated with a very short distance between the magnets and the products.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: September 9, 2003
    Assignee: ScandiNova AB
    Inventors: David Woodburn, Walter Crewson
  • Publication number: 20030155526
    Abstract: A beam handling system that switches between two beam distribution systems (irradiation areas). When the first product has passed the beam, the second product starts to be irradiated in the second beam. This may be the same beam but directed in a different direction, or two separate beams, and the switching of direction is synchronized to occur as one product irradiation is completed and the second comes into position.
    Type: Application
    Filed: February 21, 2002
    Publication date: August 21, 2003
    Inventors: David Woodburn, Walter Crewson
  • Publication number: 20030136917
    Abstract: A beam delivery system uses a set of electronically controlled magnets with a common magnetic yoke to steer the beam directly onto the products being irradiated with a very short distance between the magnets and the products.
    Type: Application
    Filed: January 18, 2002
    Publication date: July 24, 2003
    Inventors: David Woodburn, Walter Crewson
  • Publication number: 20030128554
    Abstract: A power modulator includes a plurality of magnetic cores, at least one secondary that surrounds all of the magnetic cores, and at least one pulse generating module made up of an energy storage capacitor, switching means electronically controllable at turn-on and turn-off, a diode or an assembly of series-connected diodes connected in parallel with output conductors, and a set of single-turn or multi-turn primary windings, each set of primary windings surrounding a respective one of the plurality of magnetic cores, the sets of primary windings being connected in parallel to thereby provide a power modulator where each of the pulse generating modules drives all of the plurality of magnetic cores.
    Type: Application
    Filed: January 4, 2002
    Publication date: July 10, 2003
    Inventors: Walter Crewson, David Woodburn