Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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Analysis of Flux Observers Using Parameter Sensitivity

  • Nam H.T. (Dept. of Electrical Engineering, Kyungbuk National University) ;
  • Lee K.J. (Dept. of Electrical Engineering, Kyungbuk National University) ;
  • Choi J.W. (Dept. of Electrical Engineering, Kyungbuk National University) ;
  • Kim H.G. (Dept. of Electrical Engineering, Kyungbuk National University) ;
  • Chun T.W. (Dept. of Electrical Engineering and Information Systems University of Ulsan) ;
  • Noh E.C. (Dept. Electrical Engineering Pukyong National University)
  • Published : 2001.10.01
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Abstract

To achieve a high performance in direct vector control of induction motor, it is essential to correct estimation of rotor flux. The accuracy of flux observers for induction machines inherently depends on parameter sensitivity. This paper presents an analysis method for conventional flux observers using Parameter Sensitivity. The Parameter sensitivity is defined as the ratio of the percentage change in the system transfer function to the percentage change of the parameter variation. We define the ratio between real flux and estimated flux as the transfer function, and analyzed a parameter sensitivity of this transfer function by simulation.

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