Patents by Inventor John Keith Nelson

John Keith Nelson 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: 8796372
    Abstract: Electrical insulation comprising a polymeric matrix having compounded therein, a functionalized dielectric nanoparticle filler comprising a self-healing moiety, dispersible in the polymeric matrix, wherein the electrical insulation is capable of self-healing upon exposure to corona discharge.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: August 5, 2014
    Assignee: Rensselaer Polytechnic Institute
    Inventors: John Keith Nelson, Brian Benicewicz, Atri Rungta, Linda S. Schadler
  • Publication number: 20120277378
    Abstract: Electrical insulation comprising a polymeric matrix having compounded therein, a functionalized dielectric nanoparticle filler comprising a self-healing moiety, dispersible in the polymeric matrix, wherein the electrical insulation is capable of self-healing upon exposure to corona discharge.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 1, 2012
    Inventors: John Keith Nelson, Brian Benicewicz, Atri Rungta, Linda S. Schadler
  • Patent number: 7884149
    Abstract: A nanocomposite material suitable for electrical insulation includes a polymer compounded with a substantially homogeneously distributed functionalized nanoparticle filler. The nanocomposite material is produced by compounding the polymer with the functionalized nanoparticle filler by imparting a shear force to a mixture of the polymer and filler capable of preventing agglomeration of the filler whereby the filler is substantially homogeneously distributed in the nanocomposite material. The electrical insulation may be adapted for AC or DC high voltage, and may also be adapted for low or medium voltage to prevent formation of water tree structures.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: February 8, 2011
    Assignee: Rensselaer Polytechnic Institute, Inc.
    Inventors: John Keith Nelson, Walter Zenger, Robert John Keefe, Linda Sue Schadler Feist
  • Publication number: 20100036035
    Abstract: A nanocomposite material suitable for electrical insulation includes a polymer compounded with a substantially homogeneously distributed functionalized nanoparticle filler. The nanocomposite material is produced by compounding the polymer with the functionalized nanoparticle filler by imparting a shear force to a mixture of the polymer and filler capable of preventing agglomeration of the filler whereby the filler is substantially homogeneously distributed in the nanocomposite material. The electrical insulation may be adapted for AC or DC high voltage, and may also be adapted for low or medium voltage to prevent formation of water tree structures.
    Type: Application
    Filed: July 17, 2009
    Publication date: February 11, 2010
    Applicant: Rensselaer Polytechnic Institute
    Inventors: John Keith Nelson, Walter Zenger, Robert John Keefe, Linda Sue Schadler Feist
  • Patent number: 7579397
    Abstract: A nanocomposite material suitable for electrical insulation includes a polymer compounded with a substantially homogeneously distributed functionalized nanoparticle filler. The nanocomposite material is produced by compounding the polymer with the functionalized nanoparticle filler by imparting a shear force to a mixture of the polymer and filler capable of preventing agglomeration of the filler whereby the filler is substantially homogeneously distributed in the nanocomposite material. The electrical insulation may be adapted for AC or DC high voltage, and may also be adapted for low or medium voltage to prevent formation of water tree structures.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: August 25, 2009
    Assignee: Rensselaer Polytechnic Institute
    Inventors: John Keith Nelson, Walter Zenger, Robert John Keefe, Linda Sue Schadler Feist
  • Patent number: 7271571
    Abstract: A system for providing anti-islanding protection of a synchronous machine based distributed generator includes a frequency sensor configured to generate a generator frequency signal, a bandpass filter configured for filtering the generator frequency signal, a governor controller configured for using the filtered frequency signal to generate a power feedback signal, and a governor summation element configured for summing the filtered frequency signal, the power feedback signal, and a reference power to provide an electrical torque signal. Another system includes a voltage sensor configured to generate a generator terminal voltage signal, a feedback power calculator configured for generating a reactive feedback power signal, a bandpass filter configured for filtering the terminal voltage signal, and a PI controller summation element configured for summing the filtered terminal voltage signal, the reactive power feedback signal, and a reference reactive power to provide an error signal.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: September 18, 2007
    Assignee: General Electric Company
    Inventors: Zhihong Ye, Pengwei Du, John Keith Nelson, Nicholas Wright Miller, Reigh Allen Walling
  • Patent number: 7202638
    Abstract: A system for providing anti-islanding protection of a synchronous machine based distributed generator includes a frequency sensor configured to generate a generator frequency signal, a bandpass filter configured for filtering the generator frequency signal, a governor controller configured for using the filtered frequency signal to generate a power feedback signal, and a governor summation element configured for summing the filtered frequency signal, the power feedback signal, and a reference power to provide an electrical torque signal. Another system includes a voltage sensor configured to generate a generator terminal voltage signal, a feedback power calculator configured for generating a reactive feedback power signal, a bandpass filter configured for filtering the terminal voltage signal, and a PI controller summation element configured for summing the filtered terminal voltage signal, the reactive power feedback signal, and a reference reactive power to provide an error signal.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: April 10, 2007
    Assignee: General Electric Company
    Inventors: Zhihong Ye, Pengwei Du, John Keith Nelson, Nicholas Wright Miller, Reigh Allen Walling
  • Patent number: 5838881
    Abstract: An intelligent controller for on-line monitoring of circulation system in order to minimize a problem of streaming electrification and to avoid degradation of the electrical insulation of the system. The controller is designed to combine advantages of fuzzy logic and neural networks, and includes a fuzzy logic (employing a pseudo-neural network) for acquiring analog input data from a plurality of sensors and for interpreting this input data into fuzzyfier outputs. A main processor consisting of a fully connected feed-forward neural network serves for processing the fuzzifier outputs in order to obtain controlling instructions for the system.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: November 17, 1998
    Assignee: Electric Power Research Institute, Inc.
    Inventors: John Keith Nelson, John Arthur Palmer