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Parameter Estimation by OE model of DC-DC Converter System for Operating Status Diagnosis

Jeon, Jin-Hong    (Industry Applications Research Laboratory, Korea Electro-technology Research Institute   ); Kim, Tae-Jin    (Industry Applications Research Laboratory, Korea Electro-technology Research Institute   ); Kim, Kwang-Su    (Industry Applications Research Laboratory, Korea Electro-technology Research Institute   ); Kim, Kwang-Hwa    (Industry Applications Research Laboratory, Korea Electro-technology Research Institute  );
  • 초록

    This paper deals with a parameter estimation of the DC-DC converter system for its diagnosis. Especially, we present the results of parameter estimation for the DC-DC converter model by the system identification method. The parameter estimation for the DC-DC converter system aims at the diagnosis of its operating status. For the operating status diagnosis of the DC-DC converter system, we assume that the DC-DC converter system is an equivalent model of the Buck converter and estimate the main parameter for on-line diagnosis. In addition, for verification of an estimated parameter, we compare a bode plot of the estimated system transfer function and measurement results of the HP4194 instrument. It is a control system analyzer for system transfer function measurement. Our results confirm that the main parameter for diagnosis of the DC-DC converter system can be estimated by the system identification method and that the aging status of the system can be predicted by these results on operating status.


  • 주제어

    DC-DC Converter .   on-line diagnosis .   parameter estimation .   system identification.  

  • 참고문헌 (8)

    1. CLERC Guy, etc. ‘Cegely's Diagnostic tools for electrical drives’, IEEE. SDEMPED 01, pp. 85-89 
    2. Jin-Hong JEON, etc, ‘Parameter Estimation of DC-DC Converter System for Operating Status Diagnosis’, The ICEE2004, pp.881-884, July 2004, Sapporo, Japan 
    3. Amini Lahyani, etc, ‘Failure Prediction of Electrolytic Capacitors during Operation of a Switch mode Power Supply’, IEEE Transaction on PE., Vol.13, No.6, Nov. 1998 
    4. Lennart Ljung, System Identification, Pentice Hall, 1999 
    5. Jin-Hong JEON, etc, 'The Design and Implementation of Platform for DC-DC Converter Diagnosis Using Java Virtual Machine', The Energy Engineering Journal, Volume 13-A Number 3 pp.213-218, September 2004 
    6. Tae-Jin KIM, etc. 'Diagnosis of DC/DC converter aging with parasitic resistance', KIPE. PEAC 2003, 2003. 7, pp. 97-101 
    7. A. Landi, L. Sani, 'Modulating function testing the performance of switch mode converter', IEEE. SDEMPED 01, pp.195-200 
    8. A.J. Margues Cardoso, ‘Converter Fault Diagnosis in Variable Speed DC Drives, by Park's Vector’, ISIE'97, pp. 497-500 

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