Temperature characteristics of bulk YBCO exposed to high frequency fluctuant magnetic field in high-TC superconducting maglev system

Abstract

In high-temperature superconductor (HTS) Maglev system, the permanent magnet guideway (PMG) can't be formed by the whole permanent magnet (PM), which results in the existence of multiple PM splicing slots in the PMG. Moreover, this kind of splicing gap will become bigger with the longer service time of PMG. In addition, due to material inhomogeneity and magnetization difference inside a single PM and there will be fluctuation in magnetic field (MF) above PMG. The fluctuation may have a great impact on the efficient and stable operation of the Maglev system. This paper focuses on the influence of fluctuant MF on the temperature rise inside bulk HTS, including the internal loss caused by cooling height (CH), working height (WH) and frequency of MF change. Finally, the HTS Maglev system is analyzed from temperature rise inside the bulk HTS. The results and analyses of this article are useful for the application of bulk HTSs in the Maglev system.