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Demagnetization Fault Diagnosis of a PMSM Based on Structure Analysis of Motor Inductance
Seokbae Moon,Jewon Lee,Hyeyun Jeong,Sang Woo Kim IEEE 2016 IEEE transactions on industrial electronics Vol.63 No.6
<P>A demagnetization fault in a permanent-magnet synchronous machine (PMSM) degrades performance and energy efficiency. The demagnetization fault causes flux-density difference and changes the PMSM inductances. Such varying parameters make it difficult to detect and diagnose the exact severity of a demagnetization fault. In this paper, we suggest a use of structural analysis of the PMSMs to diagnose the demagnetization fault. We can calculate varying inductances and consider the magnetic saturation effect with varying flux linkages of the machine. Combination of the proposed technique with the least-square (LS) method shows better results than the conventional methods in the estimation of flux linkages in the PMSMs with the demagnetization fault. Experimental results demonstrate that the proposed method works well both in the tracking of varying inductances and the diagnosis of the demagnetization fault.</P>
선형보간법을 이용한 매립형 영구자석 동기모터의 감자고장진단
정혜윤(Hyeyun Jeong),문석배(Seokbae Moon),이호진(Hojin Lee),김상우(Sang Woo Kim) 대한전기학회 2017 전기학회논문지 Vol.66 No.3
This paper proposes a demagnetization fault diagnosis method for interior permanent magnet synchronous motors(IPMSMs). In particular, a demagnetization fault is one of the most frequent electrical faults in IPMSMs. This paper proposes an estimation method for permanent magnet flux. The method is based on linear interpolation. The effectiveness of the proposed method for diagnose demagnetization faults is verified through various operating conditions by finite element simulation.