Influences of geometrical configuration on AC loss measurement with pickup-coil method
Influences of geometrical configuration on AC loss measurement with pickup-coil method
复制标题
几何结构对拾波线圈法交流损耗测量的影响
DOI：
10.1109/77.783402
复制
发表时间：
1999
影响因子：
1.8
通讯作者：
A. Takenaka
中科院分区：
文献类型：
--
作者：
K. Kajikawa;M. Iwakuma;K. Funaki;M. Wada;A. Takenaka
超导导线和电缆在横向交流磁场中的交流损耗通常采用拾波线圈法测量。在这种情况下，主拾取线圈同轴地位于缠绕为螺线管线圈的样品线周围。一个额外的拾取线圈（抵消线圈）也被放置在样本线圈的内部或外部。这种方法有利于获得样品的详细电磁特性。在本研究中，我们讨论了三种类型的安排的抵消线圈的拾波线圈法测量的交流损耗的样品和拾波线圈的几何配置的效果。我们解析计算了由于在样品线中感应的磁矩而进入拾取线圈的互连磁通量，并制定了拾取线圈方法中的几何误差。我们还准备了一些套样品和拾波线圈，并比较观察到的交流损耗与理论预测。
We usually measure AC losses of superconducting wires and cables exposed to a transverse AC magnetic field by a pickup-coil method. In this case, a main pickup coil is coaxially located around the sample wire wound as a solenoidal coil. An additional pickup coil (a cancelling coil) is also placed inside or out side the sample coil. This method is advantageous to obtain detailed electromagnetic properties of the sample. In the present study, we discussed the effect of the geometrical configurations of the sample and pickup coils on AC losses measured by the pickup coil method for three types of arrangements of the cancelling coils. We analytically calculated interlinkage magnetic flux into the pickup coils due to magnetic moments induced in the sample wire, and formulated the geometrical errors in the pickup-coil method. We also prepared some sets of sample and pickup coils, and compared observed AC losses with the theoretical predictions.