Analytical-numerical hybrid model for flux-switching permanent magnet machines

Flux switching permanent magnet machines are a strong contender for applications where a high torque-to-weight ratio, power density and efficiency are required. This is the case for potential future applications in aerospace propulsion where an increasing trend to investigate the feasibility of more electrical solutions can be observed. Nevertheless, its doubly salient structure and the nonlinear characteristics of ferromagnetic materials, together with the flux concentration typical of these machines make a quick and proper appraisal of this machine´s capabilities or a sizing study for a specific application a nontrivial task. This paper addresses this gap and introduces a very practical and easy approach for solving this problem for FSPM machines based on the accuracy provided by input data from the finite element method (FEM), and taking advantage of the analytical simplicity of magnetic equivalent circuit (MEC) models.