Analytical Expression of the Magnetic Field Created by Tile Permanent Magnets Tangentially Magnetized and Radial Currents in Massive Disks

Romain Ravaud (1) , Guy Lemarquand (1)

1 LAUM - Laboratoire d'Acoustique de l'Université du Mans

In this paper, we present new expressions for calculating the magnetic field produced by either tile permanent magnets tangentially magnetized or by radial currents in massive disks. These expressions are fully analytical, that is, we do not use any special functions for calculating them. In addition, they are three-dimensional and can be used for calculating the magnetic field for all regular points in space. The expressions commonly used for calculating the magnetic field produced by radial currents in massive disks are often based on elliptic integrals or semi-analytical forms. We propose in this paper an alternative analytical method that can also be used for tile permanent magnets. Indeed, by using the analogy between the coulombian model and the amperian current model, radial currents in massive disks can be represented by using the fictitious magnetic pole densities that are located on two faces of a tile permanent magnet tangentially magnetized. The two representations are equivalent and thus, the shape of magnetic field produced is the same for all points in space, with a smaller value in the case of it is produced by radial currents in massive disks. Such expressions can be used for realizing easily parametric studies.

Mots clés: analytical calculation; radial currents; massive disks; magnetic field; tangentially magnetized

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]; Electromagnétisme

Romain Ravaud, Guy Lemarquand. Analytical Expression of the Magnetic Field Created by Tile Permanent Magnets Tangentially Magnetized and Radial Currents in Massive Disks. Progress In Electromagnetics Research B, 2009, 13, pp.309-328. ⟨10.2528/PIERB09012704⟩. ⟨hal-00366542⟩