Effect of the geometry of HTS on AC loss by using Finite Element Method simulation with B-dependent E-J power law

被引：22

作者：

Nibbio, N ^{[1
]}

Stavrev, S

机构：

[1] Swiss Fed Inst Technol, Dept Elect Engn, CH-1015 Lausanne, Switzerland

[2] Swiss Fed Inst Technol, Commun Syst Dept, CH-1015 Lausanne, Switzerland

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2001年 / 11卷 / 01期

关键词：

AC loss; finite element methods; high-temperature superconductors;

D O I：

10.1109/77.920407

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Mono and multifilamentary HTS tapes exhibit nonnegligible AC loss in self-field and considerably higher losses in the presence of external magnetic field. The effect of the conductor's geometry on the AC loss has been investigated in this paper. The nonlinear electromagnetic properties of the superconducting material are expressed with a B-dependent E-J power law and are implemented in Finite Element Method commercial software. The critical current density and the power index n dependence on B are obtained from Dd measurements of a real Bi-2223 tape. AC loss comparison between monofilamentary- conductors of rectangular, elliptical, square and round geometry has been performed in self-field and applied external perpendicular magnetic field, The areas of the cross-section and the superconducting-core-to-Ag ratio have been kept constant in the simulations. To complement the AC loss analysis, the distribution of the current density and the magnetic field of the different geometries are presented.

引用

页码：2627 / 2630

页数：4

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