Fast terminal integral sliding mode disturbance observer‑based sliding mode current control for SPMSM systems

Ran Zu; Min Li; Zijun Huang; Yanhui Huang; Dong Xu

Fast terminal integral sliding mode disturbance observer‑based sliding mode current control for SPMSM systems

Vol. 26, No. 1, pp. 101-115, Jan. 2026

10.1007/s43236-025-01212-0

Permanent magnet synchronous machine (PMSM)

Sliding mode control (SMC)

Sliding mode disturbance observer (SMDO)

Fast terminal reaching law

Abstract

To enhance robustness against lumped disturbance and improve dynamic response in surface-mounted permanent magnet synchronous motor (SPMSM) drives, this study proposes a fast terminal integral sliding mode disturbance observerbased sliding mode current control (FTIDO-SMCC). An extended SPMSM model consolidates parameter uncertainties into a lumped disturbance term, estimated via a fast terminal integral sliding mode disturbance observer (FT-ISMDO). The FTIDO- SMCC leverages the compensated model to achieve fast convergence and reduced chattering. Theoretical stability is confirmed using Lyapunov analysis. Simulations and experiments demonstrate that FTIDO-SMCC improves dynamic response time by 70% compared with conventional SMCC, while maintaining robustness under ± 33% stator resistance variations, ± 20% permanent mag- net flux variations, and load disturbances. Results validate the method’s superiority in dynamic response and disturbance rejection.

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Cite this article

[IEEE Style]

R. Zu, M. Li, Z. Huang, Y. Huang, D. Xu, "Fast terminal integral sliding mode disturbance observer‑based sliding mode current control for SPMSM systems," Journal of Power Electronics, vol. 26, no. 1, pp. 101-115, 2026. DOI: 10.1007/s43236-025-01212-0.

[ACM Style]

Ran Zu, Min Li, Zijun Huang, Yanhui Huang, and Dong Xu. 2026. Fast terminal integral sliding mode disturbance observer‑based sliding mode current control for SPMSM systems. Journal of Power Electronics, 26, 1, (2026), 101-115. DOI: 10.1007/s43236-025-01212-0.