Motor Current Signature Analysis-Based Permanent Magnet Synchronous Motor Demagnetization Characterization and Detection

Machines

Mohamed Chaieb¹  Rafik Neji²  Naourez Benhadj²  Manel Krichen²  Elhoussin Elbouchikhi³  Mohamed Benbouzid⁴ 

[1] ENICARTHAGE Department of Electrical Engineering, University of Tunis, Tunis 2035, Tunisia;ENIS Department of Electrical Engineering, University of Sfax, Sfax 3038, Tunisia;ISEN Yncréa Ouest, UMR CNRS 6027 IRDL, 29200 Brest, France;UMR CNRS 6027 IRDL, University of Brest, 29238 Brest, France;

关键词: permanent magnet synchronous motor;    demagnetization;    diagnosis;    fault detection;    motor current signature analysis;    finite element analysis;   

DOI  :  10.3390/machines8030035

来源: DOAJ

【 摘 要 】

Neodymium-boron (NdFeB) permanent magnets (PMs) have been widely studied in the past years since they became the material of choice in permanent magnet synchronous machines (PMSMs). Although NdFeB PMs have a better energy density than other types of magnets and are cost-effective, their magnetization is very sensitive to the PMSM operating conditions, in particular temperature, where the irreversible demagnetization degree increases over time. Therefore, it is important to characterize and diagnose demagnetization at an early stage. In this context, this paper proposes a two-step analysis study dealing with both uniform and partial demagnetization. A 2D finite element method-based (FEM) approach is used for demagnetization characterization, and then a PMSM motor current signature analysis (MCSA) approach, based on fast Fourier transform (FFT), is considered where fault cases harmonics are considered as faults indices to detect demagnetization. In some situations, the proposed two-step approach achieved results that clearly allow distinguishing and characterizing demagnetization. Indeed, a local demagnetization introduces specific sub-harmonics while a uniform demagnetization leads to the current amplitude increase for a given torque.

【 授权许可】

Unknown