Reference Current-Corrected Disturbance Observer Method for PMSM Cascade Speed Control System With Voltage Saturation
- 2 December 2025
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industrial Electronics
- Vol. 73 (4) , 5091-5104
Abstract
To improve the disturbance-rejection performance of the permanent magnet synchronous motor (PMSM) cascade speed control system under voltage saturation constraints (VSCs), a reference current-corrected disturbance observer (RCCDOB) method is proposed. This method first integrates the linear current loop dynamics (CLD) into the disturbance observer to minimize the impact of current tracking errors on speed loop disturbance compensation. Then, an anti-windup auxiliary system is designed to correct the reference current in order to convert the VSC into a current control input constraint, addressing the saturation nonlinearity in the CLD. Furthermore, based on this auxiliary system, an RCCDOB speed control structure is developed to enhance the robustness of the system under VSC and disturbances. The stability analysis and design procedure of the RCCDOB control system are also presented. The comparative experiment with other competitive methods in disturbance rejection verifies the effectiveness of the proposed method.Keywords
Funding Information
- National Natural Science Foundation of China (52405544)
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