Demagnetization Faults Robust Detection Method Based on an Adaptive Sliding Mode Observer for PMSM
Changfan Zhang*, Miaoying Zhang**, Jing He*, Rui Shao**, and Lixiang Luo***
*Hunan University of Technology
No.188 Taishan Xi Road, Tianyuan District, Zhuzhou City, Hunan 412007, China
**Hunan Railway Professional Technology College
No.89 Tiandong Road, Shifeng District, Zhuzhou City, Hunan 412001, China
***China Power New Energy Dongguan Cogeneration Co., Ltd.
Tongxin Road, Dongcheng District, Dongguan City, Guangdong 523127, China
To detect demagnetization faults in real time based on an adaptive sliding mode observer, we used a permanent-magnet synchronous motor (PMSM). Demagnetization faults are first modeled for the PMSM using coordinates oriented to the magnetic field. To solve demagnetization faults problems as multiple parameters change, we used adaptive and sliding mode variable structure control and designed an adaptive sliding mode observer. The adaptive estimation algorithm of the permanent magnet flux is given and the observer’s stability is proven by Lyapunov stability theory. Simulation and experimental results demonstrate the feasibility and effectiveness of our proposal.
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