Detection of Inter-Turn Faults in Multi-Phase Ferrite-PM Assisted Synchronous Reluctance Machines

Carlos Candelo-Zuluaga, Jordi-Roger Riba, Carlos López-Torres 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
Carlos López-Torres: Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain
Antoni Garcia: Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain

Energies, 2019, vol. 12, issue 14, 1-15

Abstract: Inter-turn winding faults in five-phase ferrite-permanent magnet-assisted synchronous reluctance motors (fPMa-SynRMs) can lead to catastrophic consequences if not detected in a timely manner, since they can quickly progress into more severe short-circuit faults, such as coil-to-coil, phase-to-ground or phase-to-phase faults. This paper analyzes the feasibility of detecting such harmful faults in their early stage, with only one short-circuited turn, since there is a lack of works related to this topic in multi-phase fPMa-SynRMs. Two methods are tested for this purpose, the analysis of the spectral content of the zero-sequence voltage component (ZSVC) and the analysis of the stator current spectra, also known as motor current signature analysis (MCSA), which is a well-known fault diagnosis method. This paper compares the performance and sensitivity of both methods under different operating conditions. It is proven that inter-turn faults can be detected in the early stage, with the ZSVC providing more sensitivity than the MCSA method. It is also proven that the working conditions have little effect on the sensitivity of both methods. To conclude, this paper proposes two inter-turn fault indicators and the threshold values to detect such faults in the early stage, which are calculated from the spectral information of the ZSVC and the line currents.

Keywords: multi-phase machines; rare-earth free machines; synchronous reluctance machine; fault diagnosis; inter-turn faults; finite-element method (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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