多层屏蔽电缆耦合影响的数值预测

Numerical Prediction of Coupling Effects on Multi-layered Shielding Cables

针对工程中的电缆耦合问题,采用多导体传输线方法。构建了多层屏蔽电缆电磁耦合的等效电路模型,分析了相关的感性耦合和容性耦合影响效果,并对某屏蔽电缆受邻近电缆耦合引起的串扰电压的幅频响应进行了仿真。结果表明,采取双层屏蔽较单层屏蔽能较大程度地减小耦合干扰。

Aiming at the cable coupling phenomenon in engineering, the electromagnetic coupling effects on the multilayered shielding cables are discussed with the multi-conductor transmission lines method. It formulates an equivalent circuit model, which describes the coupling effects on multilayered shielding cable. The effects of inductive coupling and capacitive coupling are analyzed. Based on this model, the multilayered shielding cable＇s amplitude-frequency response of crosstalk voltage inspired by near cable is simulated. The results show that the coupling interference could be eliminated mostly by using double-layered shielding method comparing to the single-layered shielding method.