Numerical Calculation of AC Loss of Superconductor

Edmund S.Otabe, Kyushu Institute of Technology


Numerical calculation of AC transport current loss of cylindrical superconductor was performed by JMAG. The result of calculation agreed well with theoretical analysis. In addition, AC transport loss in which magnetic field dependence of critical current density and geometrical effect of superconductor were taken into account was calculated by JMAG. The calculation result agreeed well with experimental result for QMG oxide superconducting limiting device. The reason for good agreement by prediction of simple Norris formula in which the both effect were neglected was the both effect were complemented each other. The prediction by Norris formula is considered to be accidentally coincided with the experimental result.
Keywords:finite element method, AC transport loss, Norris formula, Bean model, Kim model, Irie-Yamafuji model

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