直线型Halbach磁体和导体板构成的电动式磁悬浮系统的分析及实验

Analysis and Experimental Testing of EDS Maglev With Linear Halbach and Conducting Sheet

永磁和导体板构成的电动式悬浮系统轨道是导体板,磁体使用直线型Halbach型磁体,该系统悬浮力和磁阻力是导体板上产生的涡流和磁体的相互作用的结果。本文建立简化的二维模型,研究该悬浮系统的动态特性,从电磁场方程出发完备求解微分方程,推导悬浮力、磁阻力和浮阻比的解析表达式,并且和Ansoft计算结果以及实验结果进行对照。结果表明电动式悬浮系统二维分析模型是合理的,实验装置的设计制造也是合理的,这些对进一步研究电动式磁悬浮技术是很必要的。

The EDS maglev considered is mainly made up of linear PM Halbach arrays and conducting sheet as the guideway. Lift and drag forces of the EDS system result form interaction between eddy-current of conducting sheet and the PM magnetic fields. This paper establishes a simplified two-dimensional model, and studies the dynamic characteristic of the maglev, then deduces differential equations from Maxwell equations. On the basis of the equations, it obtains lift and drag forces and L/D expressions. In the end it presents comparisons among the analytical results and those from Ansoft and from experiment. This paper indicates that the two-dimensional model is applicable and the testing apparatus is also rationally designed. The analysis and test are necessary for further EDS maglev project.