一种用于真空管道高速磁浮的涡流制动装置分析与设计

Analyzing and Designing a New Kind of Eddy Current Braking Device Used in High Speed Maglev in Vacuum Pipeline

该文研究一种适用于超高速磁浮列车的涡流制动装置,该装置由双边Halbach阵列和制动轨组成。基于二阶矢量磁位(second order vector potential,SOVP),提出该装置的三维解析模型,推导制动力的计算式。通过旋转实验平台对解析法进行验证,解析法与实验测试结果平均相对误差约为10%。在此基础上,利用所得制动力计算式,在300~1000km/h速度区间研究永磁体排列方式、制动轨厚度以及极距等不同参数对制动力和制动效率的影响,给出适用于此区间的设计参数。最后,在相同参数下,对比分析该装置与现有技术的制动特性,在制动效率相当的情况下,该装置的制动力约为现有技术的1.8倍。该装置能产生的制动力密度为约为21.4kN/m,最大减速度约为10.7m/s2。

A new kind of eddy current braking device,which can be used in ultra-high speed maglev,was studied in this paper.This device consists of double Halbach and braking track.Based on second order vector potential(SOVP),a 3 D analytic model of the device was proposed in the paper,thus,we can get the expression of the drag force.Using this platform,a rotation experimental platform was established and the forces was tested.Compared with analytical results,and the average relative error between them is about 10%.Using the expression already get.The relationship between drag force,efficiency and some other parameters,something like thickness of track,pole pitch and arrangement of permanent magnet,in the 300~1000 km/h range were studied.And a set of designing parameters,to meet the requirement of application was found.At last,the drag characteristics both of this new and existing device were compared.The result shows when the efficiency is the same,the drag force created by this new device is 1.8 times than the existing one.The force density and maximum deceleration created by it are 21.4 kN/m and 10.7 m/s2.