AC Loss of HTS Coil and its Behavior of Magnetic Field
AC Loss of HTS Coil and its Behavior of Magnetic Field
复制标题
高温超导线圈的交流损耗及其磁场行为
DOI：
10.1007/978-4-431-66877-0_222
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Iwasa
中科院分区：
文献类型：
--
作者：
Y. Sasaki;K. Sawa;Y. Iwasa
我们从测量的电压和电流波形中得到了用银包覆Bi-2223绕成的HIS线圈在液氮中冷却时的交流损耗。根据实测数据，计算出有效电阻和有效电感。它们随交流输运电流的幅值和频率而变化。为了寻找有效电感变化的原因，我们还测量了线圈产生的磁场。几个测点上磁场幅值的变化规律与有效电感的变化规律非常相似。假设屏蔽电流会在线圈中流动，干扰线圈内磁通量的变化。
We obtained the AC loss of HIS coil wound with Ag sheathed Bi-2223, cooled in liquid nitrogen, from measured voltage and current waveforms. From measured data, effective resistance and inductance were calculated. They vary with amplitude and frequency of AC transport current. In order to search the cause of varying effective inductance, we also measured magnetic field generated by the coil. Behavior of amplitude of magnetic field on several measured points is very similar to that of effective inductance. It is supposed that shield current, which disturbs change of magnetic flux within the coil, might flow in the coil.