Extended field reconstruction method for modeling of interior permanent magnet synchronous machines

This paper presents an extended field reconstruction method (EFRM) that is developed to model an interior permanent magnet synchronous machine (IPMSM), which is known for its high power density and power factor. Traditional field reconstruction method is a very convenient tool for the modeling and analysis of the performance of the surface mounted permanent magnet machine (SPMSM). Regarding IPMSM, which usually works under saturation, traditional FRM method cannot be directly applied. An improved FRM, which considers both saturation and slottings effects, is proposed in this study. Comparisons with finite element analysis (FEA) show that EFRM has an acceptable accuracy and takes less computation time.