Numerical evaluation of AC losses in HTS wires with 2D FEM formulated by self magnetic field
Numerical evaluation of AC losses in HTS wires with 2D FEM formulated by self magnetic field
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DOI：
10.1109/tasc.2003.812415
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发表时间：
2003-07
影响因子：
1.8
通讯作者：
K. Kajikawa;Toshihiro Hayashi;Ryoji Yoshida;M. Iwakuma;K. Funaki
中科院分区：
文献类型：
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作者：
K. Kajikawa;Toshihiro Hayashi;Ryoji Yoshida;M. Iwakuma;K. Funaki
采用有限元法（FEM）对高临界温度超导线材的交流损耗进行了数值计算，该方法以感应电流产生的自磁场为未知量。数值模型是直的高温超导导线进行交流传输电流在外部交流磁场垂直于线轴。在这种情况下，导线周围的电磁场由二维（2D）麦克斯韦方程给出。它也被假定为输运性质表示的临界状态模型或幂律模型，其中的电场是成比例的电流密度的功率。在几个简单的几何形状得到的损失与传统的理论曲线进行了比较。
The ac losses of high critical-temperature superconducting (HTS) wires are numerically calculated by means of a finite element method (FEM), which is formulated with a self magnetic field due to an induced current as unknown. The numerical model is straight HTS wires carrying an alternating transport current in an external ac magnetic field perpendicular to the wire axis. In this situation, the electromagnetic field around the wires is given by two-dimensional (2D) Maxwell's equations. It is also assumed that the transport property is represented by either the critical state model or the power-law model, in which the electric field is proportional to the power of the current density. The obtained losses are compared with conventional theoretical curves in several simple geometries.