Permanent magnet synchronous motor sliding mode control method, device and equipment and storage medium

The integration of a self-adaptive nonlinear extended state observer and non-singular fast terminal sliding mode control with variable gain exponential approaches addresses the precision and robustness issues in PMSM systems, enhancing disturbance handling and convergence speed for improved control performance.

CN119675508AActive Publication Date: 2025-03-21CHENGDU UNIV OF INFORMATION TECH
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Patent Information

Application Number
CN202510157414.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-13
Publication Date
2025-03-21
Estimated Expiration
2045-02-13

AI Technical Summary

Technical Problem

Existing control methods for permanent magnet synchronous motors (PMSM) face challenges in maintaining high precision and robustness, especially under sudden load disturbances, due to limitations in traditional sliding mode control and state observer designs, which result in reduced accuracy and slow convergence.

Method used

A new control method is introduced that combines a self-adaptive nonlinear extended state observer with a non-singular fast terminal sliding mode controller and a variable gain exponential approach, enhancing the system's ability to handle disturbances and improve convergence speed.

Benefits of technology

The proposed method significantly reduces estimation errors and convergence time, achieving faster response and higher robustness in position tracking for PMSM systems, outperforming traditional methods by improving both observer and control performance.

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Abstract

The invention relates to the technical field of permanent magnet synchronous motor control, and discloses a permanent magnet synchronous motor sliding mode control method, device and equipment and a storage medium, and the method comprises the steps: constructing a motor state equation based on a permanent magnet synchronous motor mathematical model, taking a load torque as external disturbance, and constructing a novel adaptive nonlinear expansion state observer; based on a motor state equation, constructing a non-singular fast terminal sliding mode surface and a novel variable gain index reaching law; constructing a novel non-singular fast terminal sliding mode controller based on the novel adaptive nonlinear extended state observer, the non-singular fast terminal sliding mode surface and the novel variable gain index reaching law; and executing permanent magnet synchronous motor sliding mode control by using the novel nonsingular fast terminal sliding mode controller. Compared with the prior art, the novel sliding mode control strategy has the advantages that buffeting is greatly weakened, the control precision is improved, the convergence speed is obviously increased, and the system can be asymptotically converged to a balance point within finite time.
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