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Influence of Speed Variation of a Transverse Magnetic Field on a Magnetization of HTS Cylinder

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5 Author(s)
Kameni, A.K. ; Groupe de Rech. en Electrotech. et Electron. de Nancy, Univ. Henri Poincare, Vandoeuvre-lès-Nancy, France ; Leveque, J. ; Douine, B. ; Mezani, S.
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In this paper, we numerically study the influence of the speed variation of a magnetic source on the distribution of current density, magnetization, and dissipated energy of a high-temperature superconducting cylinder described by a Jn power law. The results presented come from the resolution of a nonlinear diffusion problem of electric field by a mixed finite-element finite-volume discretization method. This method is robust, stable, and converges for large values of n. The calculations carried out for n, varying from 1 to 200, show that when the external magnetic field quickly varies from 0 to its maximal value, the maximum values of penetration, the magnetization, and the energy dissipation are obtained when the switching of magnetic field occurs. For a periodic magnetic field, we note that any change of the period results in variation of the magnetization and the dissipated energy.

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Applied Superconductivity, IEEE Transactions on  (Volume:21 ,  Issue: 4 )