Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Center of Applied Superconductivity and Sustainable Energy Research, Chubu University, Otabe, E.S., Komatsu, S., Vyatkin, V.S., Kiuchi, M., Kawahara, T., Yamaguchi, S., Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Center of Applied Superconductivity and Sustainable Energy Research, Chubu University, Otabe, E.S., Komatsu, S., Vyatkin, V.S., Kiuchi, M., Kawahara, T., and Yamaguchi, S.
type:Journal Article, The loss energy density (AC loss) with ripple current is numerically calculated by finite element method for cylindrical and strip superconductors based on Irie–Yamafuji model in which the magnetic field dependence of the critical current density is taken into account for design of DC transmission cable system. It is confirmed that calculated result of the AC loss in the cylindrical superconductor with the ripple current agrees well with theoretical estimation which was reported in the previous work. On the contrary, the AC loss in the strip superconductor with the ripple current is obtained only by numerical calculation. It is found that the AC loss in the strip superconductor of the ripple current becomes larger than that without DC current at small ripple current amplitude, since the penetration depth of magnetic field becomes large. Therefore, it is recommended that strip superconductor is better to use as cylindrical hollow superconductor for DC transmission cable system to reduce the AC loss., Proceedings of the 25th International Symposium on Superconductivity (ISS 2012) Advances in Superconductivity XXV , December 3-5, 2012, TOWER HALL FUNABORI, Tokyo, Japan, source:https://doi.org/10.1016/j.physc.2013.04.075