Magnetic equivalent circuit modeling for interior permanent magnet synchronous machine under eccentricity fault

Eccentricity is a common mechanical fault in electrical machine operation. In this paper, we have proposed a magnetic equivalent circuit (MEC) model considering magnetic saturation to evaluate and analyse the performance of an interior permanent magnet synchronous machine (PMSM) under eccentricity fault. This model provides the advantages in fast computation while giving reasonable degree of accuracy. The potential application of this model includes fault tolerant machine design optimization, fault tolerant machine drive design, as well as fault diagnosis and monitoring. The accuracy of this model will be gauged by comparison with finite element method (FEM) modeling.