凸型Halbach阵列在永磁电动悬浮系统中的应用

Application of Convex Halbach Array in EDS System

针对传统矩形永磁Halbach阵列应用于电动悬浮系统时存在浮阻比不足的问题,采用一种磁场分布更合理的凸型Halbach阵列对此进行改善。首先对悬浮系统力学特性进行理论解析,分析磁场分布对系统浮阻比的影响;其次比较凸型和矩形2种不同Halbach阵列磁场水平分量和竖直分量分布情况,根据凸型阵列磁场分布特点结合理论分析结果得出其能够优化浮阻比的原因;最后将凸型Halbach阵列应用于电动悬浮系统,并采用仿真计算的方法验证其浮阻比优化效果。结果表明,与传统矩形结构永磁体组成的Halbach阵列相比,凸形结构永磁体可以改善Halbach阵列的磁场,使其分布更加合理,应用于电动悬浮系统时可有效提高系统浮阻比。研究结论可用于永磁电动磁浮列车等系统运行性能的优化,提高永磁电动悬浮技术在轨道交通领域的适用性。

For the insufficient levitation-drag ratio problem of EDS system with traditional rectangular permanent magnet Halbach array, the convex Halbach array with more reasonable magnetic field distribution was adopted for improvement. Firstly, the mechanical properties of EDS system were analyzed theoretically, and the influence of magnetic field distribution on levitationdrag ratio was studied;secondly, the horizontal and vertical components of magnetic field in convex and rectangular Halbach arrays were compared, according to the characteristics of magnetic field distribution of convex array and the theoretical analysis results, the reason why it can optimize levitation-drag ratio was given;finally, the convex Halbach array was applied to the EDS system, the optimization effect of levitation-drag ratio was verified by finite element simulation. The results showed that compared with the traditional rectangular permanent magnet array, convex permanent magnet array could improve the magnetic field and its distribution, which could effectively improve the levitation-drag ratio. The research results can be used to optimize the operation performance of permanent magnet electric maglev train and improve the applicability of permanent magnet electric suspension technology in the field of rail transit.