Sensorless Control of PMSM Based on an Improved Super-twisting Sliding-mode Observer

Authors

• Shiyu Chen, Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China
• Xinmin Chen, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
• Xionglong Hu, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
• Heng Wang, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
• Yepeng Han, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
• Jiajie Chen, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Abstract

Abstract: To address the chattering in back electromotive force estimation and the gain mismatch across a wide speed range when using a conventional super-twisting sliding-mode observer in the sensorless control system of a permanent-magnet synchronous motor, this paper proposed an improved adaptive-gain super-twisting sliding-mode observer. A linear correction term was introduced into the super-twisting algorithm and integrated with a gain adaptation law based on speed feedback, enabling the system to achieve finite-time convergence and high-precision back electromotive force estimation over a wide speed range. A variable-gain adaptive complex-coefficient filter was constructed to effectively suppress the harmonic components in the observed back electromotive force and avoid the amplitude attenuation and phase delay caused by using a conventional low-pass filter. Simulation results indicate that the proposed method outperforms conventional methods in terms of observation accuracy and robustness.

Recommended Citation

Chen, Shiyu; Chen, Xinmin; Hu, Xionglong; Wang, Heng; Han, Yepeng; and Chen, Jiajie (2026) "Sensorless Control of PMSM Based on an Improved Super-twisting Sliding-mode Observer," Journal of System Simulation: Vol. 38: Iss. 8, Article 14.
DOI: 10.16182/j.issn1004731x.joss.25-1012
Available at: https://dc-china-simulation.researchcommons.org/journal/vol38/iss8/14

First Page

2324

Last Page

2337

CLC

TM351; TP391

Recommended Citation

Chen Shiyu, Chen Xinmin, Hu Xionglong, et al. Sensorless Control of PMSM Based on an Improved Super-twisting Sliding-mode Observer[J]. Journal of System Simulation, 2026, 38(8): 2324-2337.

Corresponding Author

Chen Xinmin

DOI

10.16182/j.issn1004731x.joss.25-1012