A Nonlinear Equivalent Magnetic Circuit (NEMC) modeling method is developed for Linear Flux-Switching Permanent Magnet (LFSPM) machines. The method is used to analyze the characteristics of linear FSPM machines by specific permeance calculations, in which the air gap nonlinear permeance is solved by FE analysis. Moreover, magnetic saturation as well as the field interaction is taken into account. A proposed LFSPM machine is used as example, the back-EMF, cogging force and thrust force are calculated. The NEMC method predicted results agree well with that deduced from FE analysis. Finally, the proposed method is verified by experimental testing of a prototype.
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