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Fields, losses and forces due to moving current distributions coaxial with a cylindrical conductor

Fields, losses and forces due to moving current distributions coaxial with a cylindrical conductor An exact mathematical solution has been obtained for the quasistationary electromagnetic field of a circular current loop coaxial with a conducting circular cylinder in uniform relative motion with respect to each other. The vector magnetic potential corresponding to a filamentary loop carrying a variable with time current is determined by applying the method of separation of variables. Expressions for the fields outside and inside the cylindrical conductor, the eddy‐current distribution, the power loss and the interaction force are derived directly from the vector potential. The fields due to practical current coils are obtained by integration from the results for the filamentary loop. An approximate simple formula is presented for a loop carrying direct current at high velocities. The analysis performed is relevant to the design and operation of magnetic devices with metallic cores in motion, linear electrical machines and electromagnetic launching systems. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Emerald Publishing

Fields, losses and forces due to moving current distributions coaxial with a cylindrical conductor

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References (15)

Publisher
Emerald Publishing
Copyright
Copyright © 2001 MCB UP Ltd. All rights reserved.
ISSN
0332-1649
DOI
10.1108/03321640110359750
Publisher site
See Article on Publisher Site

Abstract

An exact mathematical solution has been obtained for the quasistationary electromagnetic field of a circular current loop coaxial with a conducting circular cylinder in uniform relative motion with respect to each other. The vector magnetic potential corresponding to a filamentary loop carrying a variable with time current is determined by applying the method of separation of variables. Expressions for the fields outside and inside the cylindrical conductor, the eddy‐current distribution, the power loss and the interaction force are derived directly from the vector potential. The fields due to practical current coils are obtained by integration from the results for the filamentary loop. An approximate simple formula is presented for a loop carrying direct current at high velocities. The analysis performed is relevant to the design and operation of magnetic devices with metallic cores in motion, linear electrical machines and electromagnetic launching systems.

Journal

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic EngineeringEmerald Publishing

Published: Mar 1, 2001

Keywords: Electromagnetics; Magnetic fields; Motion

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