Patents by Inventor Frederick Louis Hoadley

Frederick Louis Hoadley 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).

  • Control system for active power filters
    Patent number: 6657322
    Abstract: An active filter controller for use with both pure and hybrid shunt filters wherein the controller maintains a minimum DC bus voltage required to generate a compensating current on coupling lines and also extrapolates to estimate an expected feedback current to be compensated so that compensation currents are more accurate and harmonic currents are appreciably reduced.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: December 2, 2003
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Gary Leonard Skibinski, Dongsheng Zhou, Frederick Louis Hoadley, Naihu Li, Qiang Yin
  • Control system for active power filters
    Publication number: 20030062776
    Abstract: An active filter controller for use with both pure and hybrid shunt filters wherein the controller maintains a minimum DC bus voltage required to generate a compensating current on coupling lines and also extrapolates to estimate an expected feedback current to be compensated so that compensation currents are more accurate and harmonic currents are appreciably reduced.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 3, 2003
    Inventors: Gary Leonard Skibinski, Dongsheng Zhou, Frederick Louis Hoadley, Naihu Li, Qiang Yin