A Novel REBCO Wire Structure That Improves Coil Quality Factor in MHz Range and its Effect on Wireless Power Transfer Systems
A Novel REBCO Wire Structure That Improves Coil Quality Factor in MHz Range and its Effect on Wireless Power Transfer Systems
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DOI：
10.1109/tasc.2017.2660058
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发表时间：
2017-01
影响因子：
1.8
通讯作者：
N. Sekiya;Y. Monjugawa
中科院分区：
文献类型：
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作者：
N. Sekiya;Y. Monjugawa
我们已经开发了一种结构，包括两个传统的REBCO线，提高线圈的品质因数，并模拟其对无线电力传输（WPT）系统的影响。所提出的结构是用来减少导体损耗的哈氏合金基板。通过不使用铜稳定剂和银覆盖层，降低了导线趋肤效应的导体损耗。我们研究了将所提出的结构嵌入苯乙烯泡沫中对线圈品质因数的影响，发现泡沫由于其介电损耗而降低了品质因数。我们制作了几种不同的线型螺旋线圈嵌入苯乙烯泡沫塑料，并测量了它们的品质因数在300和77 K。在300 K时，采用该结构的线圈的品质因数约为采用铜线的线圈的3.2倍。我们还模拟了WPT系统的功率传输效率，该系统使用两个线圈，对于线圈之间的不同距离具有不同的品质因数。高品质因数线圈的使用使系统能够实现更长的传输范围。
We have developed a structure consisting of two conventional REBCO wires that increases the quality factor of coils, and have simulated its effect on to wireless power transfer (WPT) systems. The proposed structure is used to reduce the conductor loss of the Hastelloy substrate. The conductor losses of the skin effect of the wires were reduced by not using a copper stabilizer and a silver overlayer. We investigated the effect of embedding the proposed structure in styrene foam on the coil quality factor and found that the foam reduced the quality factor due to its dielectric loss. We fabricated several different wire type spiral coils embedded in styrene foam and measured their quality factor at 300 and 77 K. The quality factor of the coil using the proposed structure was about 3.2 times that of one using copper wire at 300 K. We also simulated the power transfer efficiency of a WPT system using two coils with different quality factors for different distances between the coils. Use of a high-quality factor coil enabled the system to achieve a longer transfer range.