高温超导磁体临界电流的磁矢量分析法及其验证

Introduction and validation of magnetic field vector analysis method of determining the critical current of HTS magnets

临界电流是高温超导磁体的关键参数,文中提出了一种名为"磁矢量分析法"的高温超导临界电流计算方法。这种方法以高温超导带材性能测试结果为依据,以有限元仿真软件为手段,通过对计算高温超导磁体内部电磁感应强度矢量的分布,采用插值运算来确定高温超导磁体的临界电流。通过在77K温度下进行1:1的磁体实验,磁矢量分析法的可行性得到了验证。

Critical current It is one of the most important parameters of HTS magnet. The cost of the HTS magnets could be cut down by calculating its Ic correctly. In this paper, a method of determining the Io of HTS magnets was introduced, named ＂ magnetic field vector analysis method＂. This method included three steps. Firstly, the anisotropic Io of the HTS tapes in magnetic field was measured, and then the result was employed as discrete database. Secondly, the distribution of the magnetic field vector inside the HTS magnet was analyzed by means of FEM. Thirdly, the Io of the HTS magnet was got from interpolation calculation. The reliability of this method was proved by magnet experiment at 77K.