Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Two-line-same-phase AC standstill measurement method for obtaining accurate PMSM d-q-axis inductance values

  • Fang Yao (State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology) ;
  • Mingwei Li (State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology) ;
  • Leijiao Ge (School of Electrical and Information Engineering, Tianjin University) ;
  • Wenlong Liao (Department of Energy, Aalborg University) ;
  • Kody Powell (Department of Chemical Engineering, University of Utah)
  • Received : 2022.09.27
  • Accepted : 2023.03.16
  • Published : 2023.09.20
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Abstract

With their simple structure, good characteristics, small size, low weight, high starting torque, and high power density, permanent magnet synchronous motors (PMSM) are widely used in industry and national projects. However, accurate PMSM d-q-axis inductance values cannot be obtained after dynamic decoupling of the d-q-axis voltages of a PMSM under vector control. To tackle this challenge, this paper proposes a two-line-same-phase AC standstill measurement (TLSP-ACSM) method. To verify the effectiveness of the proposed method, both the motor synthetic magnetomotive force and theoretical error of inductance measurement based on the TLSP-ACSM method are analyzed, followed by experiments to demonstrate the effectiveness of TLSP-ACSM. By comparing the proposed method with another measurement method, it is demonstrated that the relative error of the d-axis and q-axis inductance measurements is reduced by about 23% and 21%, respectively. When considering magnetic flux leakage, TLSP-ACSM shows better measurement precision and tracking performance.

Keywords

Acknowledgement

This work is supported by the National Key R&D Program of China (No. 2022ZD0116900), National Natural Science Foundation of China (No. 52277118) and the State Key Laboratory of Power System and Generation Equipment (SKLD21KM10). The corresponding author is Leijiao Ge (legendglj99@tju.edu.cn).

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