Abstract This paper proposes a nonlinear subdomain and equivalent magnetic network hybrid analytical model for electromagnetic performance calculation in modular combined permanent-magnet machines (MCPMM). The nonlinear analytical model can be transformed into a linear subdomain model considering saturation effect with equivalent current densities on the boundary of the slots. The values of equivalent current densities are obtained by the equivalent magnetic network and used as boundary conditions in subdomain model, and the flux sources flowing to the equivalent magnetic network are calculated by the subdomain model. An iteration process is needed between the two analytical models. The air gap between adjacent modules is considered in the equivalent magnetic network model. The nonlinear hybrid model can accurately calculate the air gap flux density, no-load back EMF and torque. The electromagnetic characteristics of modular permanent magnet motor under asymmetric conditions are analyzed. The finite element results and experimental test verify the proposed nonlinear analytical method.
Liu Yunfei,Zhang Bingyi,Zong Ming等. Analytical Prediction of Magnetic Field in Modular Combined Permanent Magnet Motor by a Nonlinear Hybrid Model[J]. Transactions of China Electrotechnical Society, 2022, 37(18): 4593-4603.
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2022, Vol. 37 
