一种混合高温超导磁体及其电磁特性研究  

A Hybrid High Temperature Superconducting Magnet and Studies on Its Electromagnetic Characters

作　　者：肖玲 龚天勇[1,2] 喻海洋 李婧 马光同[1] XIAO Ling;GONG Tianyong;YU Haiyang;LI Jing;MA Guangtong(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031;School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031)

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]西南交通大学电气工程学院,四川成都610031

出　　处：《低温物理学报》2021年第3期193-199,共7页Low Temperature Physical Letters

基　　金：国家自然科学基金(52037008);四川省科技厅(2020YFG0354);牵引动力国家重点实验室(2019TPL_T12)资助的课题.

摘　　要：近年来,高温超导磁体由于载流能力高、磁场强等优点在磁悬浮列车、医疗成像、飞轮储能器等系统具有广阔的应用前景.在这些应用中,工作面上磁场越强,系统的性能越优.高温超导块材能够俘获强磁场,但因为尺寸的限制,其磁场发散区域小,在大气隙条件下工作面区域磁场弱.相比而言,高温超导线圈的尺寸不受限制,但其磁场会随着口径的增大而降低.因此,本文将高温超导线圈和块材结合,提出了一种结构紧凑、口径大、磁场强的混合高温超导磁体.同时,利用有限元仿真软件建立混合高温超导磁体的二维轴对称自洽模型并进行了实验验证,仿真计算了混合高温超导磁体的磁场分布以及不同温度下的临界电流和最大磁场强度.结果表明,混合高温超导磁体可显著增加工作面的磁场,相比于独立的高温超导线圈和高温超导块材最大磁场分别最小提升了102%和12%.另外,混合高温超导磁体工作面上的有效磁通相比于高温超导块材也提高了.In recent years,high-temperature superconducting(HTS)magnets have attracted growing attention in maglevs,medical imaging,flywheel energy storage system and so on due to their high current carrying capacity and strong magnetic field.In these applications,the stronger the magnetic field on the work surface,the better the performance of systems.HTS bulks can capture strong magnetic fields,but because of the limitation of size,the divergence region of magnetic field is small and the magnetic field in the working face region is weak under the condition of a large gap.In contrast,the size of the HTS coil is not limited,but the magnetic field of the magnets decreases as the size increases.Therefore,in this paper,a hybrid HTS magnet with compact structure and large size is proposed by a combination HTS coils with HTS bulks to generate strong magnetic field.At the same time,a two-dimensional axisymmetric self-consistent model was established and modified by using finite element simulation software to calculate the magnetic field distribution,critical current and the strongest magnetic field of the hybrid HTS magnet in different temperature.The results show that the magnetic field of the working face of the hybrid superconducting magnet can be significantly improved,and the maximum magnetic field is increased by a minimum of 102%and 12%,respectively when compared with the independent HTS coil and the HTS bulk.In addition,the effective magnetic flux on the working surface of the hybrid HTS magnet is also increased compared to the HTS bulk.

关 键 词：高温超导线圈 高温超导块材 临界电流 自洽模型 磁场 

分 类 号：O511.3[一般工业技术—材料科学与工程]