Magnetic equivalent circuit modelling of coaxial magnetic gears considering non‐linear magnetising curve

It is necessary to have a model to design magnetic gear (MG) optimally and to investigate the effective parameters on its performance. This study proposed a two‐dimensional (2D) model to predict the magnetic components of coaxial MG (CMG). This model is based on the mesh analysis method considering core nonlinear B‐H curve. In the proposed model, the radial and tangential components of flux densities, magnetic fluxes as well as the inner/outer rotor torque are estimated by extraction of the magnetic equivalent circuit (MEC). The effect of non‐linear B‐H magnetising curve is considered on the MEC model and it is compared with linear core (constant probability). Furthermore, the dynamic model of CMG is presented and its torque‐angle curve and consequently its pull‐out torque is obtained. To validate the proposed model, the 2D MEC model results are compared with results of finite element method analysis.