Levitation Performance of a Magnetized Bulk YBCO With Different Demagnetization Processes

The magnetized bulk high- superconductor (MBSCM) can provide dramatic improvements towards the levitation performance of HTS Maglev systems if sufficient and suitable magnetic excitation methods are employed. In the field-cooling excitation mode, the demagnetization process greatly influences the levitation performance of the MBSCM in some special operation modes. A difference in the levitation performance was observed from experimental tests under different demagnetization field strengths and rates. Simulation based on finite element method was used to calculate the temperature rise within the MBSCM during the studied demagnetization process. With experimental results and analyses, an optimal demagnetization process for the MBSCM for engineering applications was derived.