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

The Korean Institute of Power Electronics (전력전자학회)
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Stator Resistance Estimation of Permanent Magnet Synchronous Motor by using Kalman Filter

칼만 필터를 이용한 영구자석 동기 전동기의 고정자 저항값 검출 방법

  • Hwang, Sangjin (School of Electronic and Electrical Eng., Hongik Univ.) ;
  • Lee, Dongmyung (School of Electronic and Electrical Eng., Hongik Univ.)
  • Received : 2018.09.30
  • Accepted : 2018.11.12
  • Published : 2019.04.20
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Abstract

Accurate estimation of motor parameters is required in some motor control applications. For example, the value of stator resistance is required for stator flux-oriented control mostly used in doubly fed induction generator systems. Stator resistance is not a constant value and continuously changes due to the rise in temperature during motor operation. Estimation errors degrade the control performance. Hence, this study proposes a simple stator resistance estimation method. In this scheme, the differential components of voltage and current values are used to eliminate the dead-time effect, and Kalman filter algorithm is applied to reduce the error according to measurement noise. Simulation and experimental results obtained with a permanent magnet motor show the validity of the proposed algorithm.

Keywords

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Fig. 1. PMSM control block diagram with the proposed resistance estimation scheme.

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Fig. 2. Simulink simulation model of the proposed scheme.

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Fig. 3. Simulation waveform of d-axis current and corresponding phase currents: (upper) idse, (lower) phase currents.

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Fig. 4. Simulation waveform with initial value Rs=1.0Ω: (upper) idse, (lower) estimated stator resistance(Q=1.0, R=0.03).

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Fig. 5. Simulation waveform with initial value of Rs=0.01Ω: (upper) idse, (lower) estimated stator resistance(Q=1.0, R=0.03).

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Fig. 6. Experimental setup for estimating stator resistance:in-wheel motor and driver.

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Fig. 7. Experiment waveform with initial value Rs=1.0Ω: (upper) idse current command, (lower) estimated resistance with Q=1.0 and R=0.03.

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Fig 8. Experiment waveform with initial value Rs=0.001Ω: (upper) idse current command, (lower) estimated resistance with Q=1.0, R=0.03.

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Fig. 9. Simulation waveform with added noise & low pass filter with initial value of Rs=8.5Ω: (upper) idse, (lower) estimated stator resistance(Q=1.0, R=0.03).

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Fig. 10. Simulation waveform applying only low pass filter with initial value of Rs=8.5Ω: (upper) idse, (lower) estimated stator resistance(Q=1.0, R=0.03).

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Fig. 11. Simulation waveform without noise and filtering with initial value of Rs=8.5Ω: (upper) idse, (lower) estimated stator resistance(Q=1.0, R=0.03).

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Fig. 12. Experiment waveform with initial value Rs=1.0Ω & dead-time of 1.6μsec: (upper) idse current command, (lower) estimated resistance(Q=1, R=0.03).

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Fig. 13. Experiment waveform with initial value Rs=1.0Ω & dead-time of 2.5μsec: (upper) idse current command, (lower) estimated resistance(Q=1.0, R=0.03).

TABLE I SPECIFICATION OF PMSM USED FOR SIMULATION

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