摘要
高温超导带材的出现,使超导储能磁体能以更高的性价比应用于工程中,然而YBCO的各向异性使带材整体的利用率较低,储能潜力没很好开发出来。本文通过ANSYS maxwell建立磁体有限元模型,结合YBCO带材的临界电流特性以及磁体上"坏点"的位置分布规律,提出一种新磁体结构即阶梯填充系数结构。与初始储能磁体相比,优化后双阶梯填充系数磁体最大径向磁场值降低14.08%,储能提高24.88%;三阶梯填充系数磁体最大径向磁场值降低44.52%,储能提高67.17%。在此基础上进行了磁体机械稳定性检验,结果表明,机械稳定度约达80%,可稳定运行。
The appearance of HTS enables superconducting energy storage magnets to be applied in engineering with higher cost performance. However, because of the anisotropy of YBCO, the utilization rate of the whole tape is relatively low and the potential of energy storage is not well developed. In this paper, ANSYS maxwell was used to establish the finite element model of the magnet. In view of the distribution of some "bad points" on the magnet, a new magnet structure was proposed, namely, a step-space factor magnet. Compared with the initial energy storage magnet, the maximum radial magnetic field value of the double-step space factor magnet decreased by 25.25% and the energy storage increased by 14.08%;the maximum radial magnetic field value of the three-step space factor magnet decreased by 44.52% and the energy storage increased by 67.17% after optimization. On this basis, the mechanical stability of the magnet was tested. The test results show that the mechanical stability is up to 80% and stable operation is possible.
作者
李兆鑫
朱英伟
王静
玄永伟
Li Zhaoxin;Zhu Yingwei;Wang Jing;Xuan Yongwei(School of Electrical and Information Engineering,Sichuan University,Chengdu 610065,China)
出处
《低温与超导》
CAS
北大核心
2019年第12期57-61,77,共6页
Cryogenics and Superconductivity
关键词
临界电流
垂直磁场
填充系数
应力
Critical current
Vertical magnetic field
Space factor
Stress
