Contents
An integro-differential equation is established for the azimuthal eddy current in a thin circular disc. The decay of the eddy current formed when a uniform magnetic field is applied across the disc is obtained as an expansion in exponentially decaying eigenmodes. The method is generalised to a pair of coaxial discs, enabling the measured field penetration into the end-plates of a rotamak to be reproduced.
Übersicht
Eine Integro-Differentialgleichung für den azimutalen Wirbelstrom in einer dünnen leitenden Kreisscheibe wird abgeleitet. Es folgt, daß der Abfall des Wirbelstromes, der in einer Kreisscheibe von einem homogenen magnetischen Feld induziert wird, als eine Reihe von exponentiell abfallenden Eigenmoden geschrieben werden kann. Die Methode wird für ein Paar koaxialer Kreisscheiben verallgemeinert, so daß die gemessene Felddurchdringung in der Endplatte eines Rotomaks wiedergegeben wird.
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Watterson, P.A. Magnetic field penetration into thin discs. Archiv f. Elektrotechnik 73, 353–363 (1990). https://doi.org/10.1007/BF01574271
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DOI: https://doi.org/10.1007/BF01574271