Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Full speed range position-sensorless compound control scheme for PMSMs

  • Liu, Pu (College of Electric and Information Engineering, Zhengzhou University of Light Industry) ;
  • Liu, Di (College of Electric and Information Engineering, Zhengzhou University of Light Industry) ;
  • Shen, Yongpeng (College of Electric and Information Engineering, Zhengzhou University of Light Industry) ;
  • Liu, Ankang (College of Electric and Information Engineering, Zhengzhou University of Light Industry) ;
  • Yang, Xiaoliang (College of Electric and Information Engineering, Zhengzhou University of Light Industry) ;
  • Zhao, Jun (College of Electric and Information Engineering, Zhengzhou University of Light Industry)
  • Received : 2021.09.11
  • Accepted : 2022.04.10
  • Published : 2022.08.20
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Abstract

At low speeds, a high frequency signal injection method for the position-sensorless control of permanent magnet synchronous motors (PMSMs) produces additional power loss and position estimation delay. Meanwhile, at high speeds, the sliding mode observer (SMO) method has a chattering problem. With a focus on these problems, a full speed range position-sensorless compound control approach is proposed in this paper. First, the phase relationship between the different coordinate systems of the I/F control, and the mechanism of the chattering phenomenon of a sliding mode observer are analyzed. Then the full speed range position-sensorless control approach based on a combination of I/F control and an extended sliding mode observer is constructed. Through feeding back the estimated back electromotive force to the calculation of the stator current observer and using the rotated influence immune phase-locked loop, the innovative extended-SMO effectively improves the chattering phenomenon. Furthermore, the smooth transition between the two control schemes is achieved by a current slope decrement switching controller. Finally, the effectiveness of the proposed full speed range position-sensorless compound control approach for PMSMs is validated on a surface PMSM experimental bench.

Keywords

Acknowledgement

Funding was provided by National Natural Science Foundation of China (Grant No. 61803345), Science and Technology Development Project of Henan Province (Grant No. 212102210265), Science and Technology Department of Henan Province (Grant No. 222102240005).

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