内燃动车组线缆EMC仿真与防护设计

EMC simulation and protection design of internal combustion EMU cable

内燃动车组车下线缆众多、布线空间狭长,容易发生线间串扰故障。通过介绍车下布线情况,结合串扰理论,设计了一种降低线缆间串扰的屏蔽防护方案。在CST线缆工作室中对M车和T车下两种不同工况下建立线缆仿真模型,得出传感器线缆中的串扰电流、电压。通过仿真波形对比,加装屏蔽后的电流、电压相比未加屏蔽之前的串扰大幅降低,符合设备正常工作的误差范围内,验证了方案的有效性。同时对其他型号电力机车的布局布线有一定的工程参考价值。

Interwire crosstalk is easy to occur due to numerous cables and long and narrow wiring space of EMU.By introducing the wiring situation under the vehicle and combining with the theory of crosstalk,a shielding protection scheme to reduce the crosstalk between cables is designed.In the CST cable studio,the cable simulation model was established under two different working conditions of M car and T car,and the crosstalk current and voltage in the sensor cable were obtained.Through simulation waveform comparison,the current and voltage after the installation of shielding are significantly reduced compared with the crosstalk before the installation of shielding,which conforms to the error range of the normal operation of the equipment,and verifies the effectiveness of the scheme.At the same time,it has certain engineering reference value to the layout and wiring of other types of electric locomotives.