Non‑singular fast terminal sliding mode control of PMSMs with disturbance compensation

Yuchen Wang; Hongjin Chen; Minglong Zhang; Binbin Chen; Rongsheng Jia; Jianfeng Mao

Non‑singular fast terminal sliding mode control of PMSMs with disturbance compensation

Vol. 25, No. 7, pp. 1245-1255, Jul. 2025

10.1007/s43236-024-00962-7

Permanent magnet synchronous motor

Non-singular fast terminal sliding mode control

Sliding mode disturbance observer

Improved sliding mode reaching law

Abstract

To accelerate convergence speed and mitigate the impact of load disturbances on the performance of permanent magnet synchronous motor (PMSM) drives, this paper proposes an improved non-singular fast terminal sliding mode control strategy with load disturbance compensation. First, to resolve the conflict between the convergence speed and the system chattering using the traditional exponential sliding mode reaching law (TSMRL), an improved sliding mode reaching law (ISMRL) is proposed in this paper. The ISMRL incorporates an adaptive function associated with the sliding-mode surface function and integrates the state variable of the system with the sliding-mode surface. Second, to further enhance the disturbance rejection capability of the ISMRL-based speed controller (INFTSMC), this paper introduces a disturbance observer based on sliding mode control (SMDO) for estimating the load disturbance. The estimated disturbance is fed back to the speed controller as a feedforward compensation, significantly enhancing system robustness. Finally, results from simulations and experiments confirm that the INFTSMC + SMDO has better suppression of chattering, faster convergence speed of the system and stronger robustness than the TSMRL-based speed controller (TNFTSMC).

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Cite this article

[IEEE Style]

Y. Wang, H. Chen, M. Zhang, B. Chen, R. Jia, J. Mao, "Non‑singular fast terminal sliding mode control of PMSMs with disturbance compensation," Journal of Power Electronics, vol. 25, no. 7, pp. 1245-1255, 2025. DOI: 10.1007/s43236-024-00962-7.

[ACM Style]

Yuchen Wang, Hongjin Chen, Minglong Zhang, Binbin Chen, Rongsheng Jia, and Jianfeng Mao. 2025. Non‑singular fast terminal sliding mode control of PMSMs with disturbance compensation. Journal of Power Electronics, 25, 7, (2025), 1245-1255. DOI: 10.1007/s43236-024-00962-7.