摘要
分析了电路、设备接地的目的,市电供配用电系统各种接地方式相关的安全性,设备、系统、平台实现电磁兼容性所要求的接地系统形式等,归纳出兼顾安全及EMC的树形单点接地系统。最后,针对飞机平台,提出全机及机载设备的电源、信号应遵循的接地形式和原则,即采用TN-C-S系统,甚至TN-S系统,可以实现很好的全机电磁兼容性。
The paper analyses and discusses deeply the grounding aim of electrical/electronic equipment/circuit, various grounding ways of city mains supply, required grounding ways of equipment/system/platform for EMC. A tree-form single-point grounding system is concluded good for both safety and EMC. By applying such conclusion to aircraft, the grounding types and principal are clearly figured out for power supply and signals of platform and airborne equipments.
