Impact Of Magnetic Fluctuations For The High Temperature Superconducting Maglev System On The Levitation Force

Due to the capturing magnetic flux property of the high temperature superconductor, the superconductor can be stably suspended in an external magnetic field, and this phe-nomenon was used in the study of magnetic levitation train subsequently. At the same time, The high temperature superconducting maglev train is an important method to solve the fu-ture traffic development and energy depletion because of high speed and energy saving,For the high-speed operation of the HTS Maglev system, since single permanent mag-net was magnetized inhomogeneous and multiple permanent magnets existed gaps, the sur-face magnetic field distribution of permanent magnet guideway may fluctuant along the propulsion direction. Magnet fluctuations may have a greater impact on the efficient and stable operation of magnetic levitation system. Therefore, it is very necessary to study the dynamic process of the maglev system under the condition of uneven distribution of mag-netic field.In this paper, the high-temperature superconducting magnetic levitation train simula-tion test system was used to simulate levitation force performance of the superconductor in moving external magnet field by artificially changing the surface magnetic field with iron covering permanent magnet partly. On the basis, the levitation fore in covered area and not covered area was explored. The change of levitation force was also explored.In the first chapter, development of superconducting materials and magnetic levitation development process were introduced. Meanwhile, the development situation of high Tc superconducting maglev train and the levitation research progress of static and dynamic performance were introduced, too.The second chapter explained magnetic changes of iron covering the guideway and ef-fect on levitation force. The high-temperature superconducting magnetic levitation train simulation test system was used to explore the influence of different iron thickness on levi-tation by artificially changing the surface magnetic field partly.The third chapter explored the effect of different work condition on levitation by changing the circle permanent guideway rolling rate and work height and fluctuation range of magnetic field.The fourth chapter presented strong magnetic impact phenomenon and improvement method of suspension force fluctuation.