Issue Eur. Phys. J. Appl. Phys. Volume 47, Number 3, September 2009 Article Number 31102 Number of page(s) 6 Section Physics of Energy Generation, Conversion and Storage DOI 10.1051/epjap/2009102 Published online 12 June 2009

Eur. Phys. J. Appl. Phys. 47, 31102 (2009)
DOI: 10.1051/epjap/2009102

Analytical computation of an AC machine external magnetic field

R. Romary^{1, 2}, D. Roger^{1, 2} and J.-F. Brudny<sup>1, 2

1</sup>  Univ. Lille Nord de France, 59000 Lille, France
²  UA, LSEE, 62400 Béthune, France

raphael.romary@univ-artois.fr

Received: 18 July 2008 / Received in final form: 20 February 2009 / Accepted: 2 April 2009 / Published online: 12 June 2009

Abstract
This paper presents an analytical approach to estimate the magnitude of a flux density component at a point located outside an AC machine. The study uses the concept of attenuation coefficients which are determined using several hypotheses. The developments consider the different media according to they are flowed by eddy currents or not. Then, the calculations are performed in each medium.

PACS
84.50.+d - Electric motors.
41.20.Gz - Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems.

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