【摘要】 由于电磁轨道炮和其它强电流装置中短路运行的需要,研制了一种条形炸药驱动的大电流闭合开关。利用爆炸成型技术使金属飞板负电极在炸药部件作用下,大面积地同时切断绝缘薄膜,嵌入另一电极模槽中构成牢固的接触。开关的绝缘强度大于30kV,电感(包括传输线)小于50nH,最大峰值电流达到400kA,闭合接触电阻小于0.1mΩ,动作时间约为14us。对于开关的爆轰,撞击及变形过程进行了一维和二维数值模拟计算,并提出了一个描述爆炸开关行为的经验模型。利用这个模型进行电磁轨道炮整个系统的数值模拟,同实验结果符合较好。更多还原

【Abstract】 A type of high explosive-driven closing switch has been developed for crowbar in electromagnetic railguns or other intense current operating devices. The geometry configuration of the switch is a stripe. The explosive forming technique was employed to design the switch in which an aluminum impacter(cathode) driven by a special explosive assembly, areal velocity synchronistically hits and cuts the insulator. then is embedded into the slot of another electrode to form a secure con- tact. The measurements show that its puncture voltage>30kV. inductance (including transmission line)<50nH, peak current 400kA, contact resistance much less than 0.lm Ohm, and the acting time about 14μs. The ID and 2D numerical calculations were carried out to simulate the detonation impact and deformation process in the switch. An empirical model to describe the switch resistance time-dependance has been proposed, using which the numerical simulation of the railgun system performance is completed and accordant with the experimental data well.更多还原