Composite fault-tolerant predictive control strategy for PMSM demagnetization faults.
Qingxue Zhang1, Wensheng Xiao1, Lianpeng Mei1
1College of Mechanical and Electrical Engineering, China University of Petroleum (East China), Qingdao 266580, China.
ISA Transactions
|July 2, 2026
Summary
This study introduces a composite fault-tolerant predictive control strategy for permanent magnet synchronous motors (PMSMs) experiencing demagnetization. The new method enhances motor performance and robustness against load variations.
Area of Science:
- Electrical Engineering
- Control Systems
- Fault-Tolerant Systems
Background:
- Permanent magnet synchronous motors (PMSMs) suffer from reduced performance and robustness due to demagnetization faults.
- Existing control strategies struggle with effective flux linkage compensation and load variations.
Purpose of the Study:
- To develop a composite fault-tolerant predictive control strategy for PMSMs under demagnetization.
- To improve dynamic performance, flux linkage estimation, and robustness against load disturbances.
Main Methods:
- Mathematical modeling of PMSMs under normal and demagnetized conditions.
- Design of a fast integral terminal sliding mode observer (FITSMO) for real-time flux linkage estimation and compensation.
- Implementation of an adaptive fast terminal sliding mode controller (AFTSMC) and a load disturbance observer for enhanced dynamic accuracy and active compensation.
- Stability analysis using Lyapunov theory.
Main Results:
- The proposed FITSMO enables accurate real-time flux linkage estimation and demagnetization compensation.
- The AFTSMC and disturbance observer significantly improve dynamic accuracy and resilience to load variations.
- Experimental validation confirms superior fault tolerance, dynamic response, and robustness compared to conventional methods.
Conclusions:
- The composite fault-tolerant predictive control strategy effectively addresses demagnetization faults in PMSMs.
- The developed control system offers enhanced performance and robustness, making it suitable for demanding applications.
- The strategy provides a reliable solution for maintaining PMSM performance under fault conditions.
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