Simple Analytical Expressions for the Force and Torque of Axial Magnetic Couplings

Thierry Lubin (1) , Mezani Smail (1) , Abderrezak Rezzoug (1)

1 GREEN - Groupe de Recherche en Electrotechnique et Electronique de Nancy

In this paper, a theoretical analysis of an axial magnetic coupling is presented, leading to new closed-form expressions for the magnetic axial-force and torque. These expressions are obtained by using a two-dimensional (2-D) approximation of the magnetic coupling geometry (mean radius model). The analytical method is based on the solution of Laplace's and Poisson's equations by the separation of variables method. The influence of geometrical parameters such as number of pole pairs and air-gap length is studied. Magnetic field distribution, axial force and torque computed with the proposed 2-D analytical model are compared with those obtained from 3-D finite elements simulations and experimental results.

Mots clés: Analytical model; axial force; axial magnetic coupling; torque transmission

Domaines: Energie électrique; Electromagnétisme; Supraconductivité [cond-mat.supr-con]

Thierry Lubin, Mezani Smail, Abderrezak Rezzoug. Simple Analytical Expressions for the Force and Torque of Axial Magnetic Couplings. IEEE Transactions on Energy Conversion, 2012, 11 p. ⟨10.1109/TEC.2012.2183372⟩. ⟨hal-00673920⟩