次级粘合薄磁的直线平板电磁阻尼器研究

Linear Panel Asymmetric Electromagnetic Damper of a Sheet Permanent Magnetic Added on the Secondary

为了在不改变阻尼器尺寸、形状、永磁体型号以及次级金属板材料的情况下提高阻尼力,提出了一种在次级粘合一块薄磁的方案。以一个典型的直线平板电磁阻尼器为例,利用有限元分析软件,对其气隙磁场、阻尼力以及轭板外环境磁场进行了仿真分析。仿真结果表明,次级粘合薄磁后,其x方向(次级运动方向)的阻尼力显著提高,z方向的平均阻尼力不足x方向的1%。铁磁材料轭板减小了初级永磁体外侧磁阻,降低了阻尼器外部漏磁。同时,铁磁轭板在初级磁场中被磁化,增加了阻尼器边缘磁感应强度,同样有利于提高次级在此处的阻尼力。

To increase damping force without changing damper＇s size and shape,permanent magnetic（PM）type,and secondary metal materials,the study proposed a new damper＇s design of adding a sheet PM on the secondary.As an example,a typical linear panel asymmetric electromagnetic damper was simulated with finite element analysis software in terms of air gap magnetic field,damping force,and external magnetic field of yoke.The simulation results indicate that when the secondary is added by a sheet PM,the damping force of x direction（secondary moving direction）increases significantly and the average force of z direction is less than 1% of the x direction.Ferromagnetic material yoke reduces the outboard magnetic resistance of primary PM,and also reduces external leakage of the damper.At the same time,the ferromagnetic yoke is magnetized in the primary magnetic field,which increases the marginal magnetic flux density of the damper and the damping force of the secondary at this position.