馈电方式对同轴嵌套型电磁弹射器动态弹射性能的影响

Influences of Fed Manners on Dynamic Catapult Performances of Electromagnetic Catapult with Coaxial Embedded Structure

结合结构模型,给出了同轴嵌套型电磁弹射器单一脉冲功率电源激励下的驱动线圈顺接串联、同侧并联和分组同侧并联三种馈电方式相对应的系统等效电路模型,导出了其动力学模型,并通过有限元分析方法仿真了这三种馈电方式下的动态弹射性能。在单一脉冲功率电源激励下,分组同侧并联为较合理的馈电方式,弹射效率可达28.68%;同侧并联馈电时驱动线圈存在可靠加固风险,弹射效率为23.06%;而顺接串联虽有利于驱动线圈的可靠加固,但弹射效率仅为15.69%。

In order to understand the influences of fed manners on dynamic catapult performance of electromagnetic catapult with coaxial embedded structure, three fed manners, which are sequential series connection, the same side's parallel connection, group and the same side's parallel connection under the single pulsed power supply excited, are given through the combination its structure model. System equivalent circuit models corresponding with the three fed manners were built, and kinetic model was derived. Dynamic catapult performances corresponding with the three fed manners were simulated by means of finite element analysis method. Researches show the following points: the fed manner of group and the same side's parallel connection is relatively proper under the condition of single pulsed power supply excited and its catapult efficiency is about 28.68%;the fed manner of the same side's parallel connection exists the reinforcement risk for driving coil and its catapult efficiency is about 23.06%;the fed manner of sequential series connection avail to the reliable reinforcement for driving coil, but its catapult efficiency is only about 15.69%. These have some reference values for the engineering realization of the electromagnetic catapult.