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Eddy currents in a metallic disk and axial force on it due to suddenly applied magnetic field

Wirbelströme in einer metallischen Kreisscheibe und die Kraftwirkung nach dem plötzlichen Einschalten eines magnetischen Feldes

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Contents

A method of calculation of the eddy currents and the axial force after applying a magnetic impulse to a metallic disk is presented. The distribution of the eddy currents in a disk as well as the axial force on that are examined. The results can be applied to the analysis of the forming process by magnetic impulses.

Übersicht

Es wird eine Methode zur Berechnung der Wirbelströme in einer metallischen Kreisscheibe nach dem Einschalten eines magnetischen Impulses angegeben. Weiterhin wird die Axialkraft auf die Scheibe bestimmt. Die Resultate können in der Analyse von Formungsprozessen mittels magnetischer Impulse angewendet werden.

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Abbreviations

a :

radius of disk

B :

magnetic flux density

e z :

coordinate unit-vector

F :

force

g :

thickness of disk

H :

magnetic intensity

J :

current density

t :

time

γ:

conductivity

δ(t):

Dirac delta function

μ0 :

permeability of vacuum

σ(l):

unit step function

References

  1. Hannakam, L.: Transiente Stromverdrängung in dünnwandigen Rotationskörpern: Arch. Elektrotech. (1966) 277–288

  2. Krakowski, M.: Eddy-current distribution in a thin metallic plate after applying a step function of an external magnetic field. Bull. Acad. Pol. Sci., Sér. Sci. Tech. (1979) 35–41 [611–617]

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Authors and Affiliations

  1. Technical University of Łódź, ul. Żwirki 36, 90-539, Łódź, Poland

    M. Krakowski

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  1. M. Krakowski
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Krakowski, M. Eddy currents in a metallic disk and axial force on it due to suddenly applied magnetic field. Archiv f. Elektrotechnik 65, 11–13 (1982). https://doi.org/10.1007/BF01476687

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  • DOI: https://doi.org/10.1007/BF01476687

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