Experimental Research on Critical Current Behavior of Various Commercial HTS Tapes
Li Ren, Shuqiang Guo, Guilun Chen, Lushun Su, Ying Xu, Jing Shi, Lei Chen
Abstract
In practical applications, the critical current of high temperature superconducting (HTS) tapes is usually influenced by different magnetic field magnitudes and different relative magnetic field orientations. In order to design HTS power devices accurately, it is vital to study the critical current behavior of HTS tapes under different magnetic field. In this work, a series of experiments have been performed to study the critical current characteristics of seven types of commercial HTS tapes from Sumitomo, AMSC, SuperPower and SuNAM at 77 K, low-strength and 0-90° magnetic field. The experimental results and analysis have been introduced in details, including the field angle dependence of critical current of the HTS tapes. The normalized critical current ranking and anisotropy index of seven types of commercial HTS tapes are given. Furthermore, a method for estimating critical current at some magnetic field angles based on the maximum and minimum critical current values of the HTS tapes is proposed.