The influence analysis of different fault modes on the post-fault performance of fault tolerant permanent magnet synchronous motor

Abstract

The influence of different fault modes (open-circuit fault and short-circuit fault) on the post-fault performance of six-phase fault tolerant permanent magnet synchronous motor (FTPMSM) is investigated in this paper. The copper loss of the FTPMSM under different fault modes is calculated in analytical form based on the heat equivalence principle due to the non-sinusoidal waveform of non-fault phase current. The iron loss of the FTPMSM under different fault modes are accurately calculated via the electromagnetic field finite element analysis. Furthermore, the thermal analysis based on the lumped-parameter thermal network is proposed for the FTPMSM, which is able to evaluate the post-fault performance of the six-phase FTPMSM under different fault modes. This paper can provide a guideline for engineers in the fault tolerant control design of the FTPMSM.