A coupled BE-IBC formulation for multiple conductor eddy current problems

Author

Ahmed, Md Raju ; Lavers, J.D. ; Burke, P.E.

Author_Institution

Dept. of Electr. Eng., Toronto Univ., Ont., Canada

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2524

Lastpage

2526

Abstract

A coupled boundary-element-impedance-boundary-condition (BE-IBC) method in which the IBC can be applied to one or more, but not all, of the conducting regions is considered. It is shown that in order to apply the IBC selectively, it is necessary to consider carefully the manner in which the system matrix is formulated. The case of the electromagnetic mold, consisting of a right cylindrical conductor coaxial with an induction coil and short-circuit turn, is used as an application. The IBC is applied to the right cylinder, and the full BE formulation is used for the short-circuit turn. Results are presented for the electromagnetic pressure predicted by a full BE formulation and the coupled BE-IBC formulation and compared with published results. The accuracy of the numerical results and the advantages offered by the coupled BE-IBC formulation (reduced CPU time and memory requirements) are illustrated

Keywords

boundary-elements methods; computational complexity; eddy currents; electric furnaces; induction heating; boundary element method; coupled methods; electromagnetic mold; electromagnetic pressure; impedance boundary method; induction coil; memory requirements; multiple conductor eddy current problems; numerical results; reduced CPU time; right cylindrical conductor coaxial; short-circuit turn; system matrix; Boundary conditions; Coaxial components; Coils; Conductors; Eddy currents; Electromagnetic shielding; Finite element methods; Integral equations; Testing; Transmission line matrix methods;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92162

Filename

92162