In this paper, an analytical approach is proposed in developing a lumped parameter thermal model for the stator coils of naturally cooled axial-flux tooth-coil permanent magnet machines. The model comprises one tooth, the coil around it, and the air channels between coils and the teeth supporting structure; each component is subdivided into cuboidal or arc subelements. An expression of the convective exchange coefficient is proposed to take into account the radial position of each tooth. Experimental results validate the proposed model, which can also be used in the design stage of a machine.

Analytical Thermal Model of Natural-Convection Cooling in Axial Flux Machines

Nasab P. S.;Perini R.;Di Gerlando A.;Foglia G. M.;
2020-01-01

Abstract

In this paper, an analytical approach is proposed in developing a lumped parameter thermal model for the stator coils of naturally cooled axial-flux tooth-coil permanent magnet machines. The model comprises one tooth, the coil around it, and the air channels between coils and the teeth supporting structure; each component is subdivided into cuboidal or arc subelements. An expression of the convective exchange coefficient is proposed to take into account the radial position of each tooth. Experimental results validate the proposed model, which can also be used in the design stage of a machine.
2020
Analytical thermal model; axial flux machines (AFMs); design stage thermal model; inclined parallel-plate air channels; natural convection
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1132337
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