同步感应型直线电磁驱动器的续流回路优化设计

摘要

为了提高同步感应型直线电磁驱动器的出口速度和能量转换效率,对其固有的电枢捕获效应即电枢的减速特性进行了分析研究,用Ansoft软件对电枢捕获效应进行了定量的仿真分析.根据分析的结果,从外电路的角度出发,提出了减弱电枢捕获效应的方法,并且进行了有限元仿真分析.结果表明,在续流支路串联放电电阻,可以有效地减弱捕获效应;但是同时也会影响到电枢的加速效果,使得出口速度和能量转换效率降低.本文提出在续流电阻上并联一个控制开关,在电枢获得最大速度的时候,触发控制开关关断,续流电阻回路导通.仿真结果表明,这样可以有效降低电枢捕获效应,从而提高出口速度.%In order to improve the muzzle velocity and energy conversion efficiency of synchronous induction coil gun,this article studied the armature capture effect,namely,the speed reduction,,that is an inherence characteristic of armatures launched by induction coil gun.This article used Ansoft software to analysis the armature capture effect.According to results of the analysis,proposed a method to weaken the effect of armature capture from the perspective of an external circuit,did the finite element simulation and analysis.The results show that can effectively reduce the capture effect by connecting resistor in freewheeling branch.But it also affect the acceleration phase of armature which reduce the muzzle velocity and energy conversion efficiency.Connected a control switch in parallel with a continuous flow resistance.When the armature get the maximum speed,trigger control switch is turned off and freewheeling resistor circuit is turned on.Simulation results show that this can effectively reduce the armature capture effect,and improve the muzzle velocity.