High Fidelity Rapid Modeling of Hybrid Rotor PM Machines using Equivalent Machine Model

Machines that use a combination of rotor types, i.e., hybrid rotor machines, have additional degrees of freedom with rotor combinations and are shown to produce a wide array of operating characteristics with minimal design changes. However, the axial asymmetric nature of the hybrid rotor PM machines requires 3D finite element analysis (FEA) based modeling approach, which is time-consuming and computationally expensive despite the use of rotational and axial symmetry to reduce model size. This article aims to develop a faster analysis method that combines 2D FEA models with an analytical equivalent machine model of the hybrid rotor PMSM. The proposed analysis method is compared with 3D FEA to verify the accuracy and will be shown to significantly reduce the computation time while maintaining high fidelity.