AC loss in high temperature superconducting (HTS) coils affects the performance of HTS devices. Using magnetic flux diverters (MFDs) is an effective way to reduce AC loss in HTS coils. In this paper, measurement and finite element method simulation of AC loss results in a REBCO coil assembly comprising four double pancake coils with two molypermalloy-powder MFDs are presented. Both experimental and numerical results show that MFDs can significantly reduce the AC loss in the REBCO coil assembly while generating negligible loss in themselves. Further, the influence of the distance between the coil assembly and the diverters on AC loss reduction is explored. Compared with the AC loss data in the coil assembly without MFDs, over 80% AC loss reduction is achieved when the distance between the coil assembly and the diverters is at its minimum value, 2 mm. The simulation results reveal that the AC loss reduction in the coil assembly is mainly due to the reduction of the radial (perpend...

中文翻译：

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使用低损耗磁通量分流器的REBCO线圈组件中的交流损耗测量和仿真

高温超导（HTS）线圈中的交流损耗会影响HTS设备的性能。使用磁通量分流器（MFD）是减少HTS线圈中AC损耗的有效方法。本文介绍了一种REBCO线圈组件的交流损耗结果的测量和有限元模拟，该组件包括四个带两个钼合金粉末MFD的双煎饼线圈。实验和数值结果均表明，MFD可以显着减少REBCO线圈组件中的AC损耗，同时自身产生的损耗可忽略不计。此外，探讨了线圈组件和分流器之间的距离对减少交流电损耗的影响。与没有MFD的线圈组件中的交流损耗数据相比，当线圈组件和分流器之间的距离为最小值时，交流损耗降低了80％以上，2毫米 仿真结果表明，线圈组件中交流损耗的减少主要是由于径向（垂线）的减小所致。