Interaction magnetic force calculation of radial passive magnetic bearing using magnetization charges and discretization technique

Article type: Research Article

Authors: Vučković, Ana N.^{a; *} | Raičević, Nebojša B.^a | Ilić, Saša S.^a | Aleksić, Slavoljub R.^a

Affiliations: [a] Department of Theoretical Electrical Engineering, Faculty of Electronic Engineering, University of Niš, Niš, Serbia

Correspondence: [*] Corresponding author: Ana N. Vučković, Department of Theoretical Electrical Engineering, Faculty of Electronic Engineering, University of Niš, Aleksandra Medvedeva 14, 18000 Niš, Serbia. Tel.: +381 18 529 423; Fax: +381 18 588 399; E-mail: ana.vuckovic@elfak.ni.ac.rs

Abstract: Calculation of the interaction magnetic force between two ring permanent magnets with radial magnetization is presented in the paper. Such configuration corresponds to a radial passive magnetic bearing. The simple and fast analytical approach is used for this calculation based on magnetization charges and discretization technique. The results for interaction magnetic force obtained using proposed approach are compared with finite element method (FEM). The advantage of presented approach is its simplicity and time efficiency since only complete elliptic integrals of the second kind are used and other additional integrations are avoided in this calculation.

Keywords: Permanent magnet, interaction magnetic force, finite element method (FEM), magnetization charges, rapid calculation

DOI: 10.3233/JAE-131703

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 43, no. 4, pp. 311-323, 2013