Open-Circuit Air-Gap Magnetic Field Calculation of Interior Permanent Magnet Synchronous Motor With V-Shaped Segmented Skewed Poles Using Hybrid Analytical Method

Due to the local inhomogeneous magnetic saturation of core interior permanent magnet synchronous motor (IPMSM), field changes nonlinearly, which makes analytical calculation difficult. Therefore, mostly relies on finite element method (FEM). However, high computation cost FEM restricts efficiency design and analysis IPMSM. In this article, an model (AM) slotless open-circuit air-gap (OC-AG-MF) IPMSM with V-shaped segmented skewed poles is derived by combining subdomain (SDM) equivalent circuit (MEC) method, then, AM slotted OC-AG-MF obtained introducing complex relative permeance. To show effectiveness novel AM, cogging torque for electric vehicles are calculated FEM, respectively. The spatial order, amplitude–frequency characteristics, 3-D distribution analyzed. Finally, accuracy experimentally verified direct measurement no-load back electromotive force (EMF) motor. proposed in article shown accurately calculate radial tangential components considering rotor bridge effect stator slotting effect. Meanwhile, expected be improved due reduced computational effort compared prevalent FEM.