稀土永磁悬浮阵列的电磁导向结构设计

Design and Feasibility Analysis of Electromagnetic Guidance Structure Based on MAS Array

永磁阵列悬浮结构(Magnetic Array Suspension,简称MAS)与管道物流系统相结合,为新型物流运输系统带来了新的机遇,但永磁悬浮结构在实现垂向零功率自稳定悬浮的同时,存在着横向侧偏力的挑战。本文以MAS悬浮结构为研究对象,探索一种能够实现横向可控的电磁阻尼系统结构。首先,在ANSYS有限元仿真环境下探究MAS悬浮机理,分析垂向悬浮力同悬浮间隙的变化关系,及横向侧偏力随横向间隙变化的规律;其次,针对悬浮结构特点,提出了斥力型和吸力型两种电磁导向方案,并研究分析了两种方案下磁场分布特点及磁密走势;最后,在三维模型的基础上,分析并总结了电磁激励、横向间隙与侧偏力的力学关系。仿真结果表明,斥力型方案下,导向力与横向间隙呈近似线性关系,但受MAS永磁体影响,需要初始电流用于抵消永磁吸力;吸力型方案中,导向力与横向间隙呈非线性关系且不受永磁体影响。综合而言,在相同条件下,吸力型方案更加可行,磁能利用率更高,为研究永磁悬浮系统的性能提升和工程应用提供了一种可行的结构设计方案。

The combination of pipeline logistics system(PMLS)and Magnetic Array Suspension(MAS)structure brings new opportunities for new logistics transportation system,but the challenge of lateral side deflection force exists while the per-manent magnetic suspension structure achieves vertical zero power self-stabilized suspension.In this paper,the MAS levitation structure is used as a research object to explore a structure of electromagnetic damping system that can achieve lateral control-lability.Firstly,the mechanism of MAS levitation is investigated in ANSYS finite element simulation environment,and the re-lationship between vertical levitation force and levitation gap,and the law of lateral deflection force with the change of lateral gap are analyzed;Secondly,two electromagnetic guidance schemes of repulsive force type and suction force type are proposed for the characteristics of levitation structure,and the characteristics of magnetic field distribution and magnetic density trend under the two schemes are studied and analyzed;Finally,the mechanical relationship between electromagnetic excitation,lat-eral clearance and lateral deflection force is analyzed and summarized on the basis of the 3D model.The simulation results show that in the repulsive scheme,the guiding force is approximately linear with the lateral gap,but it is affected by the MAS permanent magnet,and the initial current is needed to offset the permanent magnet suction force;in the suction scheme,the guiding force is nonlinear with the lateral gap and is not affected by the permanent magnet.Collectively,the suction-type scheme is more feasible and has higher magnetic energy utilization under the same conditions,providing a feasible structural design solution for the study of performance enhancement and engineering applications of PML systems.