Overcurrent Protection and Unmatched Disturbance Rejection under Non-Cascade Structure for PMSM

Changhong Jiang, Qiming Wang, Niaona Zhang () and Haitao Ding
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Changhong Jiang: School of Electrical and Electronic Engineering, Changchun University of Technology, Changchun 130000, China
Qiming Wang: School of Electrical and Electronic Engineering, Changchun University of Technology, Changchun 130000, China
Niaona Zhang: School of Electrical and Electronic Engineering, Changchun University of Technology, Changchun 130000, China
Haitao Ding: State Key Laboratory of Automobile Simulation and Control, Jilin University, Changchun 130000, China

Energies, 2022, vol. 15, issue 18, 1-11

Abstract: A non-cascade structure with a simple parameter adjustment method and satisfying dynamic performance is investigated so as to address the problem of the complicated structure of a typical cascade control system of permanent magnet synchronous motor (PMSM) system. However, the current cannot work within a limited value under this structure, which poses a risk to circuit safety. To this end, a fast non-singular sliding mode (FNTSM) speed-control strategy is proposed to solve the inadequate resilience of the PI controller. Then, a nonlinear term is developed to address the q -axis current overrun. Furthermore, a sliding-mode disturbance observer (SMDO) is proposed to compensate for the current fluctuation caused by the unmatched load torque disturbances. Finally, stability analysis is conducted for the proposed composite strategy, and the hardware-in-the-loop experiments verify that it achieves satisfying speed-tracking performance and ensures overcurrent protection under unmatched disturbances.

Keywords: permanent magnet synchronous motor; unmatched disturbance; drive-current constraint; fast non-singular terminal sliding mode; sliding-mode disturbance observer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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