Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Fixed-time non-singular terminal sliding mode control for PMSM drive systems

  • Huixiang Liu (School of Electrical and Information Engineering, Jiangsu University) ;
  • Keqi Mei (School of Electrical and Information Engineering, Jiangsu University) ;
  • Lu Liu (School of Electrical and Information Engineering, Jiangsu University) ;
  • Yafei Chang (Beijing Institute of Control Engineering) ;
  • Shihong Ding (School of Electrical and Information Engineering, Jiangsu University) ;
  • Hanzhang Zhang (Zhejiang JIALIFT Warehouse Equipment Co., Ltd.) ;
  • Jun Wang (Zhejiang JIALIFT Warehouse Equipment Co., Ltd.)
  • Received : 2023.06.25
  • Accepted : 2023.10.30
  • Published : 2024.02.20
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Abstract

To further improve the response speed and anti-interference capability of permanent magnet synchronous motors (PMSMs), many advanced control algorithms have been developed. Among the various advanced controls, the fixed-time terminal sliding mode control is one of the effective methods. However, there are still some problems, e.g., too many parameters imposed on the control design in the existing results. In this paper, a fixed-time non-singular terminal sliding mode control (FTNTSMC) method is proposed for the speed loop of a PMSM drive system. First, to improve the closed-loop performance of the PMSM drive system, the relationship between the reference q-axis current and the speed of the PMSM is described in a second-order model. Next, a sliding mode surface with variable exponential coefficients is selected, and the expression of the controller is given. Then, the stability of the PMSM drive system is demonstrated by using Lyapunov functions. Using this method, the fixed-time convergence of the PMSM drive system can be realized and the occurrence of singularity phenomena can be avoided in a simpler and easier method. Finally, the effectiveness of the proposed method is verified by simulation and experimental results.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grants 62373170, 61973142, 62003034, 62203188 and 62103170; the Natural Science Foundation of Jiangsu Province under Grants BK20220517 and BK20210745; and the China Postdoctoral Science Foundation under Grant 2022M721386.

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