Detection of Partial Demagnetization Faults in Five-Phase Permanent Magnet Assisted Synchronous Reluctance Machines

Carlos Candelo-Zuluaga, Jordi-Roger Riba, Dinesh V. Thangamuthu and Antoni Garcia
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Carlos Candelo-Zuluaga: Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain
Jordi-Roger Riba: Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain
Dinesh V. Thangamuthu: Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain
Antoni Garcia: Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain

Energies, 2020, vol. 13, issue 13, 1-17

Abstract: This paper analyzes partial demagnetization faults in a five-phase permanent magnet assisted synchronous reluctance motor (fPMa-SynRM) incorporating ferrite permanent magnets (PMs). These faults are relevant because of the application of field weakening, or due to high operating temperatures or short circuit currents, the PMs can become irreversibly demagnetized, thus affecting the performance and safe operation of the machine. This paper proposes fault indicators to detect such fault modes with low demagnetization levels between 5.0% to 16.7% relative demagnetization. Four partial demagnetization fault detection methods are tested, which are based on the analysis of the harmonic content of the electromotive force (EMF) under no load conditions, the harmonic content of the line currents, the harmonic content of the zero-sequence voltage component (ZSVC) and the analysis of the power factor (PF). This work also compares the sensitivity and performance of the proposed detection methods. According to the fault indicators proposed in this paper, the results show that the analysis of the EMF, ZSVC and PF are the most sensitive detection methods. Experimental results are presented to validate finite element analysis (FEA) simulations.

Keywords: electric machines design; multi-phase motors; permanent magnet motors; synchronous reluctance motors; fault diagnosis; partial demagnetization faults; finite element analysis (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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