基于数值方法的HTS磁悬浮永磁导轨最优化OptimizationofPermanent.PDFVIP

基于数值方法的HTS磁悬浮永磁导轨最优化 基于数值方法的HTS磁悬浮永磁导轨最优化 Optimization of Permanent Magnet Guideway for HTS Maglev Vehicle with Numerical Methods 张江华 摘 要  由于现有永磁导轨的缺陷，例如低效率，一种Halbach永磁导轨被提出用以改进高温超导磁悬浮工具 的悬浮性能。Halbach永磁导轨的磁感应使用分析方法来计算。超导体中的电流密度分布使用有限元方法来计 算，而导轨和物体之间的磁悬浮力则使用洛伦兹公式计算。最后，依据磁悬浮工具的特性，提出了一种最优化 判别方法来评估高温超导磁悬浮工具的悬浮性能。 关键词  有限元方法；永磁导轨；高温超导体 ABSTRACT Because of the disadvantages of the existing permanent magnetic guideway (PMG) such as low efficiency, a Halbach permanent magnetic guideway is proposed to improve the levitation performance of high temperature superconducting (HTS) magnetic levitation (Maglev) vehicle. Magnetic induction of the Halbach PMG is calculated by analytical method. The screening current density distribution in superconductor is solved with the flux flow-creep model by finite element method (FEM), and then the levitation force between the HTS bulk and PMG is calculated by Lorentz force formula. According to the characteristic of the Maglev vehicle, a optimality criterion is proposed to evaluate the levitation performance for the HTS Maglev vehicle.Index Terms—Finite element method, flux flow-creep model, halbach permanent magnet guideway, high temperature superconductors. KEYWORDS Finite element method;flux flow-creep model;halbach permanent magnet guideway;high temperature superconductors. 1 Introduction OON after the discovery of high temperature carrying HTS Maglev testing vehicle was made using Ssuperconductor (HTS) in 1986, it was found that high YBCO melt-textured bulks over NdFeB permanent temperature superconductor bulk can be stably levitated magnet guideway (PMG) in 2000 [6] . Compared with the above permanent magnet and doesn’t need complex conventional active con