多级磁阻型发射器余能回收利用的仿真与实验

Simulation and Experiment of Multistage Reluctance Launcher with Residual Energy Recovery and Utilization Mode

发射效率是磁阻型电磁发射器的重要性能指标。在传统的磁阻发射模式下,驱动线圈中的剩余电流会产生反向电磁力,从而降低抛体速度,影响系统的发射效率。针对该问题,提出了一种并联充电的剩余能量回收利用模式驱动电路。该模式使用一个脉冲电源为前三级电容并联充电,通过最后一级电容回收前几级的剩余能量,有效抑制了前几级发射过程中的反向力,并且剩余能量在最后一级得到重新利用。以四级磁阻型发射器为例,详细阐述了驱动电路的工作原理,并通过有限元仿真验证其可行性。搭建了四级发射的试验平台,在两种不同的工作电压下对该模式进行实验验证,实验结果与仿真结果基本吻合。实验与仿真结果均表明,该模式能够有效提高多级磁阻型电磁发射器的发射效率。利用有限元软件对仿真模型的电容参数进行优化,进一步提高了系统的发射效率。

Launching efficiency is an important performance indicator of reluctance launchers.In the traditional reluctance launch mode,the residual current in the drive coil generates reverse electromagnetic force,which reduces the projectile velocity and affects the launching efficiency of the system.As for the problem,a drive circuit of residual energy recovery and utilization mode with parallel charging is proposed.This mode uses a pulsed power supply to charge the first three stages of capacitors in parallel and recovers the residual energy from the previous stages through the last stage capacitors.The reverse force during the launching process of the previous stages is effectively suppressed,and the residual energy is reused in the last stage.the working principle of the driving circuit is expounded in detail with a fourstage reluctance launcher as an example,and its feasibility is verified by finite element simulation.A test platform of four-stage launching is built,and the mode is experimentally verified under two kinds of different operating voltages,and the experimental results basically match with the simulation results.Both experimental and simulation results show that the model can effectively improve the launching efficiency of the multistage reluctance launcher.Finally,the capacitance parameters of the simulation model are optimized by using finite element software to further improve the launching efficiency of the system.