编织参数对电缆辐射特性的影响  

Effect of Braided Parameter on the Radiation Characteristics of Cables

作　　者：熊奇 张健穹[1] 李相强[1] 王庆峰[1] Xiong Qi;Zhang Jianqiong;Li Xiangqiang

机构地区：[1]西南交通大学物理科学与技术学院

出　　处：《安全与电磁兼容》2021年第2期77-80,共4页Safety & EMC

摘　　要：从屏蔽电缆的共模辐射机理引出转移阻抗,结合某型动车组线槽和屏蔽电缆结构,通过仿真软件对不同编织参数电缆的屏蔽性能做出了规律性的分析,并与编织层覆盖率计算公式相互验证了计算结果。结果表明:编织束数、编织束内的导线数、单位长度上编织层交叉的股数的增加会导致转移阻抗减小、屏蔽效能增大,但电缆的低耗和柔韧性降低。电缆参数优化,需综合考虑各参数对电缆整体性能的影响。From the mechanism of common-mode radiation of the shielded cables,the concept of transfer impedance is derived.Combined with the structure of trunking and shielded cables of a certain type of EMU,the shielding effectiveness of cables with different braided parameters is analyzed by simulation software.The results are verified with the formula of the rate of the optical coverage of the shield.The results show that the increase of the number of carriers,the number of wires in one carrier and picks per unit length will reduce the transfer impedance and enhance the shielding effectiveness.However,the cable's low consumption and flexibility are reduced.In the optimization of cable's parameters,the influence of each parameter on the overall performance of the cables should be considered comprehensively.

关 键 词：屏蔽电缆 电磁辐射 转移阻抗 编织参数 

分 类 号：U266[机械工程—车辆工程]