The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Initial Rotor Position Estimation of an IPMSM Based on Least Squares Approximation with a Polarity Identification

극성 판별이 가능한 최소 제곱법 기반의 IPMSM 회전자 초기 위치 추정

  • Kim, Keon Young (Dept. of Electrical and Computer Eng., Ajou University) ;
  • Bak, Yeongsu (Dept. of Electrical and Computer Eng., Ajou University) ;
  • Lee, Kyo-Beum (Dept. of Electrical and Computer Eng., Ajou University)
  • Received : 2017.11.29
  • Accepted : 2017.12.28
  • Published : 2018.02.20
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Abstract

An initial rotor position estimation method is proposed in this study for an interior permanent-magnet synchronous motor without a resolver or an absolute encoder. This method uses least squares approximation to estimate the initial rotor position. The magnetic polarity is identified by injection of short pulses. The proposed estimation process is robust because it does not require complex signal processing that depends on the performance of a digital filter. In addition, it can be applied to various servo systems because it does not require additional hardware. Experimental results validate the effectiveness of the proposed method using a standard industrial servomotor with interior-permanent magnets.

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References

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