Patents by Inventor Soon yeol Nam

Soon yeol Nam 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).

  • Method for measuring fundamental frequency component of fault current or voltage signal
    Patent number: 6597160
    Abstract: A method for measuring the fundamental frequency component of a fault current or voltage, including measuring a fault current or voltage signal, which includes a DC-offset, a characteristic frequency component, a fundamental frequency component, and harmonics, with a predetermined sampling period, filtering the fault current or voltage signal to remove the harmonics, removing the fundamental frequency component from the filtered fault current or voltage signal, calculating the DC-offset and the characteristic frequency component with the fault current fault current or voltage signal wherein the fundamental frequency component is removed, and determining the fundamental frequency component by subtracting the calculated DC-offset and the characteristic frequency component from the filtered fault current or voltage signal.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 22, 2003
    Assignee: Myongji University
    Inventors: Soon yeol Nam, Sang Hee Kang, Jong Keun Park
  • Method for measuring fundamental frequency component of fault current or voltage signal
    Publication number: 20030094936
    Abstract: A method for measuring the fundamental frequency component of a fault current or voltage, including measuring a fault current or voltage signal, which includes a DC-offset, a characteristic frequency component, a fundamental frequency component, and harmonics, with a predetermined sampling period, filtering the fault current or voltage signal to remove the harmonics, removing the fundamental frequency component from the filtered fault current or voltage signal, calculating the DC-offset and the characteristic frequency component with the fault current fault current or voltage signal wherein the fundamental frequency component is removed, and determining the fundamental frequency component by subtracting the calculated DC-offset and the characteristic frequency component from the filtered fault current or voltage signal.
    Type: Application
    Filed: February 26, 2002
    Publication date: May 22, 2003
    Inventors: Soon Yeol Nam, Sang Hee Kang, Jong Keun Park