AC loss mitigation for high temperature superconducting coils in wireless power transfer

作     者：Hongyi Chen Hongye Zhang 

作者机构：Research Center for Graph ComputingZhejiang LabHangzhouChina Department of Electrical and Electronic EngineeringUniversity of ManchesterManchester M139PLUnited Kingdom 

出 版 物：《Superconductivity》 (超导（英文）)

年 卷 期：2023年第6卷第2期

页      面：6-24页

学科分类：0808[工学-电气工程] 1002[医学-临床医学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0807[工学-动力工程及工程热物理] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 10[医学] 

基　　金：IEEE Council on Superconductivity Graduate Study Fellowship in Applied Superconductivity 

主　　题：Wireless Power Transfer(WPT) High temperature superconductor Loss reduction Inter‐turn gap Tape width 

摘      要：With the rapid development of high temperature superconducting(HTS)technology,second generation(2G)HTS materials have become a promising alternative to traditional conductive materials in the power transmission ***,the topic of using HTS materials in wireless power transfer(WPT)systems for electric vehicles(EVs)has attracted widespread attention in the background of net zero *** virtually zero DC resistance and superior current‐carrying capacity,HTS materials can achieve high quality factor and power density in the WPT resonant circuits compared to conventional metals,e.g.,***,the optimal working frequency for the conventional WPT system is relatively high in the order of kilohertz *** coils working at high frequencies could generate high AC losses,reducing the overall power transfer efficiency(PTE)and increasing the cooling *** order to improve the PTE of HTS‐WPT systems,the AC loss mitigation methods for different HTS coil topologies have been investigated in this paper by varying the inter‐turn gap and tape *** HTS coil structures,namely the spiral coil,the solenoid coil and the double pancake(DP)coil,have been studied with a 2D axisymmetric multi‐layer numerical model based on the H‐formulation,and the simulation results have been validated by the published experimental *** general loss characteristics,loss distributions in each turn,as well as magnetic flux densities have been analysed in detail for three types of HTS ***,the impact of these two loss reduction methods on the WPT performance has also been *** have shown that increasing the inter‐turn gap and tape width can effectively reduce the AC power losses and increase the PTE of the HTS‐WPT *** spiral coil demonstrates the highest AC power loss reduction effect and PTE while maintaining a stable level of magnetic *** paper is believed to deepen the understanding of superconducting WPT and provi