Studies On Magnetic Levitation Of High Temperature Superconductor Bulk Magnetized By The Pulse Magnetic Field

Since the discovery of high-temperature superconductors (HTSs) in 1986 some important conclusions have been achieved about its physical property, fundamental theory, fabrication method, characteristic and application. Pinning centers, which are some abnormal regions in type II superconductors, will hinder the flux motion. After field cooling (FC) and pulse, or the other magnetization process, supercurrents will be induced in HTS YBCO bulk superconductor and the superconductor can be used as permanent magnet. It means that further development will be made in the superconducting applications. High-temperature superconductor has not only strong diamagnetic property but also flux pinning capability, which cause self-stability. With the development of HTS materials, the potential applications such as flywheel and Maglev vehicle will be more feasible. In the paper, levitation characteristics of HTS bulk sample using different pulsed cooling conditions were investigated by both experiment and simulation.In the experiments, the levitation characters of a HTS above a permanent magnetic guideway were studied in the case of pulsed-field cooling. Since the anisotropy and growth sectors of bulk superconductor, trapped fields of the melt-texturing processed YBCO bulk superconductor can show it's characterizes obviously after magnetization of pulsed fields. Next, the levitation force, the lateral force and the levitation stiffness of the magnetized bulk superconductor was studied. At the same times, we explored the same piece of high-temperature superconducting bulk of the relevant experimental results at the zero-cooling conditions, filed cooling conditions and the pulsed-field cooling respectively. In this article, a numerical method for solving the current and field distributions inside devices containing type-II superconductors is described. At last, we introduced the friendly interface and the relevant platform interface parameters of the simulation package. Because of the parameters of the numerical analysis were derived from theoretical calculations and experimental results, the results may be beneficial to the application of superconducting magnet.