DocumentCode :
1392853
Title :
New model for the computation of quasi-stationary fields due to arbitrary distributions of magnetic dipoles
Author :
Ciric, Ioan R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada
Volume :
36
Issue :
4
fYear :
2000
fDate :
7/1/2000 12:00:00 AM
Firstpage :
1990
Lastpage :
1995
Abstract :
The quasi-stationary field of a magnetic dipole in free space is modeled by using the field due to a succession of dipoles oriented along any line between the poles of the original. Dipole, the two fields being identical everywhere except for the points on that line. By choosing appropriately the path of the equivalent string of dipoles, the resultant field due to the original dipole can be obtained from the superposition of fields with a simpler structure. In this paper, the proposed modeling method is illustrated for the quasi-stationary ac field of an arbitrarily located and oriented dipole in the presence of a conducting spherical shell, with the analytic expression of the field quantities derived in terms of single series, which are much more convergent than the double series in the expressions available in the literature. The model presented can be applied efficiently for analyzing eddy-current problems and electromagnetic shielding by various spherical, cylindrical, and planar structures in the presence of arbitrary distributions of electric current
Keywords :
eddy currents; electromagnetic shielding; magnetic fields; magnetic moments; conducting spherical shell; cylindrical structure; eddy current; electric current distribution; electromagnetic shielding; magnetic dipole distribution; planar structure; quasi-stationary field; series; spherical structure; Computational modeling; Conductors; Current; Distributed computing; Electromagnetic modeling; Magnetic analysis; Magnetic devices; Magnetic levitation; Magnetic shielding; Solids;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.875266
Filename :
875266
Link To Document :
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