Interior permanent magnet machine analysis using finite element based equivalent circuit model

Due to the high local magnetic saturation, interior permanent magnet (IPM) brushless and synchronous machines are normally simulated based on finite element analysis (FEA). This paper presents a simulation approach based on the equivalent circuit extraction (ECE) model from FEA results. A high efficient sweep technique is introduced and the simulation results for an IPM machine are compared with the transient FEA results and the test data.