Online Fault Detection of Permanent Magnet Demagnetization for IPMSMs by Nonsingular Fast Terminal-Sliding-Mode Observer

Sensors

Kai-Hui Zhao²  Te-Fang Chen²  Chang-Fan Zhang¹  Jing He¹ 

[1] School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China; E-Mail:;School of Traffic and Transportation Engineering, Central South University, Changsha 410073, China; E-Mails:

关键词: nonsingular fast terminal-sliding-mode observer (NFTSMO);    interior permanent magnet synchronous motors (IPMSMs);    permanent magnet (PM);    demagnetization;    fault detection;    flux-weakening control;   

DOI  :  10.3390/s141223119

来源: mdpi

【 摘 要 】

To prevent irreversible demagnetization of a permanent magnet (PM) for interior permanent magnet synchronous motors (IPMSMs) by flux-weakening control, a robust PM flux-linkage nonsingular fast terminal-sliding-mode observer (NFTSMO) is proposed to detect demagnetization faults. First, the IPMSM mathematical model of demagnetization is presented. Second, the construction of the NFTSMO to estimate PM demagnetization faults in IPMSM is described, and a proof of observer stability is given. The fault decision criteria and fault-processing method are also presented. Finally, the proposed scheme was simulated using MATLAB/Simulink and implemented on the RT-LAB platform. A number of robustness tests have been carried out. The scheme shows good performance in spite of speed fluctuations, torque ripples and the uncertainties of stator resistance.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.