Abstract
This paper discusses an analysis of internal short circuits (ISC) on a low pole dual-stator flux-switching permanent magnet (FSPM) synchronous machine. The 6/4 FSPM topology utilized in this paper is particularly useful in high speed applications due to low pole count. One of the key feature of the dual-stator 6/4 FSPM is that it overcomes the even harmonics which is an important drawback in the conventional 6/4 FSPM topology. Unlike interior permanent magnet (IPM) machines, where both permanent magnet (PM) and saliency contribute to overall torque, FSPM machines rely only on the PM to develop torque. Hence for a given torque value, PM flux is higher in FSPM than IPM which makes ISC more detrimental in FSPM. Finite element analysis (FEA) is performed on both the dual-stator 6/4 FSPM and a baseline IPM machine. Typically, IPM machines have considerable amount of spatial harmonics. However, because of its unique even order harmonic cancelation properties, the current waveforms obtained for the dual-stator FSPM are more sinusoidal which make it easier for online diagnostics of ISC.
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