论文部分内容阅读
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。
Due to the short-circuit operation of the electromagnetic rail gun and other strong current devices, a strip dynamo-driven high current closed switch was developed. The use of explosive molding technology so that the metal negative electrode in the role of the explosive parts, large area at the same time cut off the insulating film, embedded in another electrode mold to form a solid contact. The dielectric strength of the switch is greater than 30kV, the inductance (including the transmission line) is less than 50nH, the maximum peak current reaches 400kA, the contact resistance of the contact is less than 0.1mΩ, and the operating time is about 14us. The one-dimensional and two-dimensional numerical simulation of the detonation, impact and deformation process of the switch were made and an empirical model describing the behavior of the explosion switch was proposed. The numerical simulation of the entire system of the electromagnetic rail gun using this model is in good agreement with the experimental results.