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- Title
基于环轭型探测线圈的永磁同步电机局部退磁 故障定位方法.
- Authors
陈昊; 高彩霞; 桑晓晨; 许孝卓; 封海潮; 司纪凯
- Abstract
Exact localization of demagnetized permanent magnets (PMs) is crucial to prevent catastrophic fault of motor system and develop system operation and maintenance strategies. The demagnetization fault cases of permanent magnet synchronous motors(PMSMs) with multiple PMs are complex, and hence demagnetization fault localization is difficult. A toroidal yoke search-coil-based method for locating fault in PMSM with local demagnetization fault is proposed. In the presented demagnetization fault localization method, three toroidal yoke coils wound around the stator yoke to obtain the signature containing demagnetization fault information. Based on the output signals of three search coils, the demagnetization fault location signals(DFLs) were produced by basic calculation, which are partitioned according to certain rules. Demagnetization fault type can be identified through waveform of partition DFL, and the healthy condition of all corresponding PMs can be determined through one mechanical period. Then, the location of demagnetized PMs can be detected. First, the methods for constructing and modelling DFLs were developed. Waveforms of partitioned DFLs under preset fault types were studied by using the established partition mathematical model. Finally, the approach for diagnosing the location of local demagnetization fault in PMSM using DFLs partition was proposed. Simulation and experimental results show that the proposed method can accurately locate the demagnetization fault ( demagnetization severity is no less than 10% ) of any number of PMs. It provides a new scheme for demagnetization fault localization and provides a reference for fault post-processing and fault-tolerant control of PMSM.
- Subjects
PERMANENT magnet motors; TOROIDAL magnetic circuits; FAULT-tolerant control systems; FAULT location (Engineering); PERMANENT magnets; SUPERCONDUCTING coils
- Publication
Electric Machines & Control / Dianji Yu Kongzhi Xuebao, 2023, Vol 27, Issue 4, p97
- ISSN
1007-449X
- Publication type
Article
- DOI
10.15938/j.emc.2023.04.010