Dual-domain anti-interference permanent magnet synchronous motor model-free predictive control method and system

By employing a model-free predictive control method with dual-domain disturbance rejection, and utilizing a sliding mode disturbance observer and a discrete linear extended state observer to decouple mechanical and electrical disturbances, the steady-state ripple and chattering problems of permanent magnet synchronous motors are solved, thereby improving the robustness and dynamic response capability of the system.

CN122247265APending Publication Date: 2026-06-19CHINA UNIV OF MINING & TECH
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Filing Date
2026-04-01
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing permanent magnet synchronous motor control technologies suffer from steady-state ripple problems due to current inner loop model dependence, speed outer loop sliding mode chattering problems, and disturbance observation bandwidth compromise problems, lacking a global collaborative control architecture.

Method used

A model-free predictive control method with dual-domain disturbance rejection is adopted. The disturbances in the mechanical and electrical domains are estimated by a sliding mode disturbance observer and a discrete linear extended state observer, respectively. The current predictive control is then performed by combining non-singular terminal sliding mode control and unweighted value function to achieve decoupling of multi-source disturbances and ultra-fast feedforward compensation.

Benefits of technology

It effectively suppresses mechanical chattering and electrical disturbances, reduces switching ripple and losses, and improves the robustness and dynamic response of the system.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122247265A_ABST
    Figure CN122247265A_ABST
Patent Text Reader

Abstract

This invention discloses a model-free predictive control method and system for permanent magnet synchronous motors with dual-domain disturbance rejection. In the mechanical domain, a non-singular terminal sliding mode controller incorporating a sliding mode disturbance observer is constructed. A hyperbolic tangent function is used to replace the reaching law to eliminate chattering, and feedforward compensation for load abrupt changes is achieved. In the electrical domain, a discrete linear extended state observer is constructed to estimate lumped disturbances, establishing a current hyperlocal model that is independent of physical parameters. Based on this, the optimal continuous control voltage vector is calculated in one step by performing extremum analytical differentiation on the unweighted value function, and the duty cycle is precisely allocated using space vector pulse width modulation. This invention achieves physical-level decoupling of mechanical and electrical disturbances, effectively overcoming the steady-state accuracy bottleneck of conventional model-free predictive control, greatly suppressing high-frequency switching ripple, and significantly improving the system's robustness and control accuracy.
Need to check novelty before this filing date? Find Prior Art