Study on Low-Loss and High-Energy Density Coil Structure of a Wireless Power Transmission System Using High Temperature Superconducting Coils for Railway Vehicle
Study on Low-Loss and High-Energy Density Coil Structure of a Wireless Power Transmission System Using High Temperature Superconducting Coils for Railway Vehicle
复制标题
轨道车辆高温超导线圈无线电力传输系统低损耗高能量密度线圈结构研究
DOI：
10.1109/tasc.2022.3169997
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发表时间：
2022
影响因子：
1.8
通讯作者：
Kim Seokbeom
中科院分区：
文献类型：
--
作者：
Inoue Ryota;Ueda Hiroshi;Kim Seokbeom
我们一直在研究一个无线电力传输（WPT）系统，使用高温超导（HTS）线圈的铁路车辆。在以前的研究中，我们研究了概念设计的WPT系统使用高温超导线圈的铁路车辆。然而，为了将每个HTS线圈的AC损耗抑制在低温冷却器的冷却功率以下，有必要在车辆侧和接地侧并联安装多个HTS线圈。因此，我们研究了铁路车辆WPT系统中的低损耗和高能量密度线圈结构。在这项研究中，我们分析了交流损耗和耦合系数的各种高温超导线圈结构，使用窄REBaCuO（RE：稀土元素，REBCO）线并联有限元法（FEM）计算，并评估的功率传输特性的WPT系统使用高温超导线圈结构，使用窄REBCO线并联的铁路车辆。结果发现，采用窄REBCO导线并联的高温超导线圈结构的交流损耗低于采用宽REBCO导线的高温超导线圈结构。使用单饼状线圈结构的线圈之间的耦合系数高于使用双饼状线圈结构的线圈之间的耦合系数。此外，WPT系统的接收功率密度提高了高温超导线圈结构使用窄REBCO线。特别地，使用沿线圈径向平行的绞合窄导线的单个扁平线圈的接收功率密度增加到使用宽导线的单个扁平线圈的接收功率密度的约1.5倍。
We have been investigating a wireless power transmission (WPT) system using a high-temperature superconducting (HTS) coil for a railway vehicle. In the previous research, we investigated the conceptual design of the WPT system using the HTS coils for the railway vehicle. However, in order to suppress the AC loss per HTS coil below the cooling power of a cryocooler, it was necessary to install multiple HTS coils in parallel on the vehicle and ground sides. Therefore, we investigated the low-loss and high-energy density coil structure in the WPT system for the railway vehicle. In this study, we analyzed the AC loss and the coupling coefficient of various HTS coil structures using the narrow REBaCuO (RE: Rare Earth elements, REBCO) wires in parallel by finite element method (FEM) calculation, and evaluated the power transmission characteristics of the WPT system using the HTS coil structures using the narrow REBCO wires in parallel for the railway vehicle. As a result, we found that the AC loss of the HTS coil structure using the narrow REBCO wires in parallel was lower than that using the wide REBCO wire. The coupling coefficient between coils using a single pancake coil structure was higher than that using a double pancake coil structure. Also, the receiving power density of the WPT system was improved by the HTS coil structures using the narrow REBCO wires. Particularly, the receiving power density of the single pancake coil using the twisted narrow wire in parallel in the coil radial direction increased to about 1.5 times that of the single pancake coil using the wide wire.