Permanent magnet synchronous motor double-filter type active-disturbance-rejection rotating speed control method and system

By combining a dual-filter extended state observer and a switching mechanism, the trade-off between disturbance rejection capability and noise suppression capability in the speed control system of permanent magnet synchronous motor is solved, achieving efficient transient and steady-state control of the system and improving the system's stability and robustness.

CN122292976AActive Publication Date: 2026-06-26NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202610738472.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-27
Publication Date
2026-06-26
Estimated Expiration
2046-05-27

AI Technical Summary

Technical Problem

Existing permanent magnet synchronous motor speed control systems have trade-offs between disturbance rejection and noise suppression capabilities when facing parameter uncertainties, load torque variations, and external disturbances, and the system stability margin and robustness are relatively poor.

Method used

By employing a dual-filter extended state observer (DFESO) combined with a switching mechanism, PI-type and dual-filter PI-type observer structures are constructed. The system stage is determined by the filtering error, enabling different control strategies under transient and steady-state conditions, thereby enhancing disturbance rejection and noise immunity.

Benefits of technology

It improves the system's transient immunity and steady-state noise immunity, ensures smooth switching, and enhances the system's stability margin and robustness.

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Abstract

The invention belongs to the technical field of active-disturbance-rejection rotating speed control of permanent magnet synchronous motors, and particularly discloses a double-filter type active-disturbance-rejection rotating speed control method and system of a permanent magnet synchronous motor, and the method comprises the steps: constructing a double-filter extended state observer which comprises a PI type observer structure and a double-filter PI type observer structure; obtaining an input error of the double-filter extended state observer, and performing double-filtering processing on the input error of the double-filter extended state observer to obtain a filtering error; and judging the current stage of the observer according to the filtering error, and further realizing double-filter type active-disturbance-rejection rotating speed control of the permanent magnet synchronous motor by adopting a control law based on a switching mechanism. According to the method, the problems that when the rotating speed of the motor is subjected to instantaneous interference, the transient anti-interference capability is weak, the rotating speed control does not distinguish transient control and steady-state control, the steady-state current control performance is poor, and the transient anti-interference capability is insufficient, the steady-state noise immunity is poor, the stability margin is low and the system robustness is poor in the existing method are solved.
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