Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Improvement of Conventional Sliding Mode Observer for Full Range Sensorless Control of a PMSM

  • Wibowo, Wahyu Kunto (Department of Mechatronics Engineering, Graduate School, Pukyong National University) ;
  • Jeong, Seok-Kwon (Department of Refrigeration and Air-Conditioning, Pukyong National University)
  • Received : 2015.05.13
  • Accepted : 2015.08.13
  • Published : 2015.08.31
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Abstract

This paper investigates some strategies to overcome the chattering problem of the conventional sliding mode observer (SMO) and to improve the rotor position estimation performance for full range sensorless control of a PMSM. An adaptive observer gain based on the Lyapunov's stability criterion and a cascade low pass filter with advanced phase delay compensation were proposed to reduce the chattering problem and to strengthen the filtering capability of the SMO. Several cases studies through experiments were carried out to confirm conventional SMO's problems and effectiveness of the proposed strategies. The experimental results show that the proposed method gives precise estimation on speed and rotor position when the motor rotates on 2% of its rated speed.

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References

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