Presentation Information
[APP1-05]A redescription of inhomogeneity and anisotropy in bulk superconductors and it application in HTS pinning maglev
*Yanxing Cheng1, Li Wang1, Jun Zheng1 (1. Southwest Jiaotong University (China))
Keywords:
high-temperature superconducting bulk,maglev,inhomogeneity,anisotropy
High-temperature superconducting (HTS) pinning maglev is one of the most promising application scenarios of the HTS bulk. There is an obvious spatial inhomogeneity and anisotropy in the electromagnetic properties of the bulk superconductors prepared by the top-seed melt-texture growth method, which affect the performance of magnetic levitation. However, this feature can be used to match the track to improve the system's carrying capacity. Based on numerical methods, we deeply explore the inhomogeneity and anisotropy of high-temperature superconducting (HTS) bulk to better adapt to HTS pinning maglev systems. A three-dimensional representation method of the spatial inhomogeneity of Jc in the bulk superconductor based on the layering-simplified model was proposed, which was successfully applied to the simulation of bulk arrays containing seed crystal surfaces with different orientations. Based on the concept of equivalent resistivity tensor and its eigenvalues, a method to characterize the anisotropy of the bulk superconductors with a rotating attitude is constructed, which provides a theoretical basis and modelling method to achieve the best match between the bulk orientation and the orbital magnetic field. Our research methods and conclusions will provide scientific basis and reference for the formulation of bulk-track matching principles of HTS pinning maglev systems.