Abstract：The problem to be solved in this paper is the internal magnetic field distribution of armature of multi-stage synchronous induction coil launcher(SICL) and shielding optimization. Firstly, this paper analyzes magnetic induction intensity distribution and electromagnetic performance when armature is not shielded during launching. The shielding effectiveness of shielding body and electromagnetic performance under different thicknesses were respectively compared using a single layer of conductive and magnetic material and combination of three-layers. Finally, the combined shielding scheme was optimized at different locations and thicknesses. Simulation results show that the shielding effectiveness of single-layer conductive materials is better than permeability magnetic materials under strong magnetic induction intensity, it opposites when under weak magnetic induction intensity. The shielding effectiveness is better when shield body is located at in front of armature. Finally, the optimization scheme that using combination of 0.5mm copper, 0.5mm copper, 2mm steel 1008 and location of shield is in front of armature is proposed. Magnetic induction intensities before and after shielding are 0.3303T and 0.1552T, the shielding effectiveness is 6.560dB.
管少华, 关晓存, 郭灯华, 王帅. 多级同步感应线圈发射器电枢内部强磁场屏蔽与优化[J]. 电工技术学报, 2020, 35(zk2): 333-340.
Guan Shaohua, Guan Xiaocun, Guo Denghua, Wang Shuai. Shield of Armature of Multi-Stage Synchronous Induction Coil Launcher Internal High Magnetic Field and Optimization. Transactions of China Electrotechnical Society, 2020, 35(zk2): 333-340.
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2020, Vol. 35 
