三相屏蔽电缆布线对磁场屏蔽效能的影响

Analysis on Different Cable Routing Influence of Magnetic Field Shielding Effectiveness for Three Phase Shielded Cable

利用理论分析和数值仿真两种方法,从电路和磁场两个角度分析了三相屏蔽电缆布线方式对磁场屏蔽效能的影响。通过仿真分析发现,当三相屏蔽电缆采用等边三角形布置时,比采用并排直线布置方式具有更佳的磁场屏蔽效能,可有效避免通过额外增加整改器件来抑制磁场辐射发射,大幅降低后期磁场抑制成本。

The paper anaylizes the different distribution influence on Magnetic-field shield effectiveness for 3-phase shielded cable, from the two issue of both Circuit and Magnetic field,by theoretical analysis and numerical simulation. Through the analysis of the results, it is found that the three-phase shielded cable has the better magnetic field shielding effectiveness when equilateral triangle is arranged than parallel is arranged. At last, the paper suggests that the 3-phase shielded cable should adopt equilateral triangle arrangement first, which will effectively avoid adding the extra rectification device to suppress magnetic radiation, thereby greatly reducing the cost of magnetic fieldsuppression lately, and has great application value.