AC Losses in HTS Tapes and Devices With Transport Current Solved Through the Resistivity-Adaption Algorithm

被引:21
作者
Gu, Chen [1 ]
Qu, Timing [2 ]
Li, Xiaofen [1 ]
Han, Zhenghe [1 ]
机构
[1] Tsinghua Univ, Dept Phys, Appl Superconduct Res Ctr, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Mech Engn, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
AC loss; finite-element analysis (FEA); flux motion; numerical simulation; resistivity adaption; FINITE THICKNESS; CRITICAL-STATE; SUPERCONDUCTORS; CONDUCTORS;
D O I
10.1109/TASC.2013.2242069
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
Alternating current (ac) losses in high-temperature superconductor tapes and devices with transport current are solved by using the resistivity-adaption algorithm (RAA). The most advanced feature of the RAA is that it enables the simulation of any model derived from the flux motion theory on finite-element analysis (FEA) packages that have an eddy current solver. The principle of the RAA, as well as its realization on the ANSYS FEA package, is introduced. The simulation begins with the calculation of the ac loss of an ellipse and of strips with aspect ratios ranging from 50 to 2000. The accuracy and efficiency of the calculation are verified through comparisons with the Norris theoretical curves. The possible errors and the method to overcome such errors are discussed. The most significant improvement in the proposed RAA from that discussed in a previous study is that the RAA was proven to be valid for calculating the field-dependent critical state model by using the descendant process from +I-m to -I-m. We then extend this method to calculate the transport ac loss of a stack of ellipses with J(c)(B) characteristic from a typical Bi2223/Ag tape and the transport ac loss of a stack of strips with J(c)(B) characteristic from a typical YBCO-coated conductor.
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页数:8
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