Ld, Lq Inductance Computation of IPMSM by Magnetic Equivalent Circuit Taking Leakage Flux and Magnetic Saturation Phenomenon into Account

Abstract

The paper proposes a new magnetic equivalent circuit. The proposed magnetic circuit is applied to calculate the Ld, Lq inductance for the IPMSM motor using the magnetic equivalent circuit method. Analysis PMSM by magnetic equivalent circuit method greatly reduces computational cost compared to finite element method, but the accuracy also reduced. We proposed the new magnetic equivalent circuit that increasing accuracy by including model of flux leakage phenomenon and magnetic saturation phenomenon. The proposed magnetic equivalent circuit is applied for IPMSM with V-shape magnet type. The results show that the difference between proposed method and finite element method is less than 8%.