Physica C: Superconductivity and its Applications ( IF 1.7 ) Pub Date : 2021-06-10 , DOI: 10.1016/j.physc.2021.1353910 Fedai Inanir , Rifki Terzioglu
In this study, an extended A-V formulation is used to determine the alternating current (AC) losses of a coil made of high temperature superconducting (HTS) tape. The current is the same at each turn by balancing the voltages of each turn. By this modification, this method can be applied in a wide application area. This method also provides the chance to determine the calculations at currents higher than the critical current values in a more stable way. The AC loss characteristics of the pancake coil are examined in detail by changing the current value and frequency. Also, the losses at individual turns (1st, 5th, and 10th) are presented. It was seen that the most outer and inner turns have higher losses than that of the other turns. The AC loss results obtained from the extended A-V formulation used in this study are compared with experimental and H-formulation-based results and are in good agreement. The frequency dependence of the pancake coil's loss is revealed at 5 frequency values. The results show that the loss is frequency and current amplitude dependent as expected. Similarly, the calculated losses for each frequency are in good agreement with that obtained from the H- formulation. The current distributions of a single tape and the entire coil are also presented, and all results are discussed in detail.
中文翻译:
使用扩展的 AV 公式对带有涂层导体的超导扁平线圈进行交流损耗评估
在这项研究中,扩展的 AV 公式用于确定由高温超导 (HTS) 胶带制成的线圈的交流 (AC) 损耗。通过平衡每匝的电压,每匝的电流都相同。通过这种修改,该方法可以应用于广泛的应用领域。该方法还提供了以更稳定的方式确定高于临界电流值的电流计算的机会。通过改变电流值和频率来详细检查扁平线圈的交流损耗特性。此外,在各个匝1的损失(ST,5次和10次) 呈现。可以看出,最外圈和最内圈的损耗高于其他圈。从本研究中使用的扩展 AV 公式获得的 AC 损耗结果与实验和基于 H 公式的结果进行了比较,并且非常一致。薄饼线圈损耗的频率依赖性在 5 个频率值处显示。结果表明,损耗与预期的频率和电流幅度有关。类似地,每个频率的计算损失与从 H 公式获得的损失非常一致。还介绍了单个磁带和整个线圈的电流分布,并详细讨论了所有结果。