access icon free Magnetic equivalent circuit modelling of coaxial magnetic gears considering non-linear magnetising curve

© The Institution of Engineering and Technology
Received 30/01/2019, Accepted 09/10/2019, Revised 06/09/2019, Published 23/10/2019

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.

Inspec keywords: magnetic flux; rotors; finite element analysis; equivalent circuits; magnetic circuits; torque; gears

Other keywords: magnetic equivalent circuit modelling; coaxial magnetic gears; MEC model; nonlinear magnetising curve; torque-angle curve; mesh analysis method; magnetic components; magnetic fluxes; core nonlinear B-H curve; coaxial MG; radial components; flux densities; dynamic model; two-dimensional model; linear core; finite element method analysis; tangential components

Subjects: d.c. machines; Finite element analysis; General circuit analysis and synthesis methods

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