Patents by Inventor Jong Guen Yoon

Jong Guen Yoon 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).

  • Monitoring the operational state of a fuel cell stack
    Patent number: 8906568
    Abstract: A technique is described herein for monitoring the operational state of a fuel cell stack by the detection of nonlinearity in such a manner that an external test signal for frequency response is generated and applied to the fuel cell stack during operation, the resulting signal output from the fuel cell stack is measured, and the harmonic content of the measured signal is analyzed, the method including: applying a multiple frequency test signal comprising at least two sinusoidal waves as the test signal for frequency response to the fuel cell stack; and analyzing the resulting current or voltage signal output from the fuel cell stack.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: December 9, 2014
    Assignees: Hyundai Motor Company, Kangnam University Industry-Academia Cooperation Foundation
    Inventors: Kwi Seong Jeong, Seung Chan Oh, Young Bum Kum, Sae Hoon Kim, Jung Do Suh, Duck Whan Kim, Young Hyun Lee, Seung Ryeol Yoo, Myung Ju Jung, Jong Guen Yoon
  • MONITORING THE OPERATIONAL STATE OF A FUEL CELL STACK
    Publication number: 20120135327
    Abstract: A technique is described herein for monitoring the operational state of a fuel cell stack by the detection of nonlinearity in such a manner that an external test signal for frequency response is generated and applied to the fuel cell stack during operation, the resulting signal output from the fuel cell stack is measured, and the harmonic content of the measured signal is analyzed, the method including: applying a multiple frequency test signal comprising at least two sinusoidal waves as the test signal for frequency response to the fuel cell stack; and analyzing the resulting current or voltage signal output from the fuel cell stack.
    Type: Application
    Filed: May 17, 2011
    Publication date: May 31, 2012
    Applicants: Kangnam University Industry-Academia Cooperation Foundation, HYUNDAI MOTOR COMPANY
    Inventors: Kwi Seong Jeong, Seung Chan Oh, Young Bum Kum, Sae Hoon Kim, Jung Do Suh, Duck Whan Kim, Young Hyun Lee, Seung Ryeol Yoo, Myung Ju Jung, Jong Guen Yoon