摘要
从描述电磁轨道炮炮口电压波形的场路模型出发,构建了电枢/轨道高速滑动接触电阻与轨道电流波形、炮口电压波形、电枢膛内速度曲线和轨道结构参数之间的关系,依据此关系可定量表征电磁轨道炮高速滑动接触电阻。实例计算表明,电枢/轨道高速滑动接触电阻的变化依赖于轨道电流变化,对应电流上升段、平顶段和电流下降段。在平顶段接触电阻最小约0.2mΩ,在电流上升段和电流下降段,接触电阻达3mΩ。
Based on the physical model of the electromagnetic railgun,aquantitative expression of sliding contact resistance of electromagnetic railgun is derived.The expression is related to the rail current,muzzle voltage,in-bore velocity of the armature and the rail configuration.The calculated sliding contact resistances between armature and rail depend on rail current.The resistance is different at different region of the rail current.At flat region,the contact resistance is about 0.2mΩand at the rising and falling regions,the contact resistance reaches 3mΩ.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2014年第4期81-84,共4页
High Power Laser and Particle Beams
基金
中国工程物理研究科学技术发展基金项目(2012B0402057)
关键词
电磁轨道炮
滑动接触电阻
定量表征
electromagnetic railgun
sliding contact resistance
quantitative expression
