混合EMS型磁浮列车的悬浮磁铁设计与分析

研究适用于EMS型磁浮列车的全尺寸电磁永磁混合悬浮磁铁的设计问题。通过比较永久磁铁的不同安装位置的影响,给出混合磁铁的结构方案。根据混合磁铁吸力公式,得出只有在永久磁铁矫顽力大于一定值时利用混合磁铁才能减小悬浮能耗。分析了混合磁铁的设计要求,研究满载起浮、稳态悬浮、空载吸死三种典型情况下对电磁线圈窗口高度的约束,得出混合磁铁的优化设计参数。最后利用Ansoft有限元磁场分析软件对钕铁硼永磁材料的拼装影响进行分析,给出校正后的悬浮磁铁设计结果。

Design and Analysis of the Hybrid Magnet in EMS Maglev Vehicles

This paper researches into the design of the fullscale hybrid magnet in EMS Maglev train.The hybrid magnet was made by combining electromagnet with permanent magnet(PM).Considering the different effects of the positions that PM fixed on,the structure scheme of the hybrid magnet was presented.The analysis result of the hybrid force shows that hybrid magnet can reduce the suspending power as far as the PM has a bigger coercive force.According to the design requirements,the paper also calculated the restriction on the height of the coil's window with its width treated as a constant under the following three typical conditions: rising up at full load,suspending steadily at rated load,and attracting together at zero load.The optimized parameters of the hybrid magnet were thus attained.Finally,based on the FEA(Finite Element Analysis) software,Ansoft Maxwell,the patching up effect of the NdFeB was simulated,and the revised design results were presented.