What question did this study set out to answer?

This research aims to enhance speed control in permanent magnet synchronous motors (PMSMs) by improving dynamic response and steady-state accuracy while reducing chattering.

April 8, 2026Open Access

Improved Nonlinear Integral Sliding Mode Control Strategy for Permanent Magnet Synchronous Motors

RLRui LiuAnhui Polytechnic University MQMengmeng QiuAnhui Polytechnic University

Key Points

This research aims to enhance speed control in permanent magnet synchronous motors (PMSMs) by improving dynamic response and steady-state accuracy while reducing chattering.
Proposed INISMC—ADSTA strategy implements a nonlinear piecewise sliding mode surface.
Adaptive super-twisting reaching law is applied to achieve fast convergence.
Lyapunov stability analysis is conducted for validation.
Experiments performed on DSP to verify the effectiveness of the proposed strategy.
The strategy optimizes dynamic response and steady-state accuracy effectively.
Demonstrates strong disturbance rejection capabilities.
Outperforms traditional PMSM control methods in multiple performance indicators.

Abstract

To solve the coordinated optimization of dynamic response, steady-state accuracy and chattering suppression in PMSM speed control, an INISMC—ADSTA strategy is proposed. Its nonlinear piecewise sliding mode surface alleviates the conflict between integral saturation and dynamic performance, while the adaptive super-twisting reaching law achieves fast convergence and chattering suppression. Verified by Lyapunov stability analysis, finite-time convergence proof and DSP experiments, the strategy optimizes multiple performance indicators coordinately with strong disturbance rejection, outperforming traditional methods.

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