通信车电磁兼容问题整改案例  

Analysis and Correction Methods for the Electromagnetic Compatibility Problem in the Communication Vehicle

作　　者：傅林[1] 

机构地区：[1]成都工业学院

出　　处：《安全与电磁兼容》2014年第1期67-69,共3页Safety & EMC

基　　金：四川省教育厅重点项目(No.12ZA061)

摘　　要：根据场线耦合理论,提出了比较距离概念。结合某型通信车电磁干扰的具体问题进行分析讨论,找出了其产生电磁干扰的原因是由于车载交换机本身内部PCB板设计不符合比较距离规定,提出了在车内交换机内部PCB上加装共模滤波器、改进车内电源滤波器盒的布局和接线等整改措施。整改后,通信车内设备满足电磁兼容测试的各项要求,设备间干扰减小到最低程度,整车测试也达标。The concept of compared instance was proposed according 1o the coupling mechanism between transmission line and field. Combined with the practical EMI problem in a certain type of communication vehicles, the reason was analyzed that the EMI came from the PCB of on-vehicle communication switcher itself which does not conform to the role of compared instance. The correction and promotion way was proposed, snch as adding a choke fiher on the PCB, promoting the layout and links in power line EMI filtering box, etc. After adopting those correetion methods, the equipments met the z^quirements of EMC standards according its measurement items, because the EMI among equipments in vehicle reduced farthest, and the whole vehicle passed the test according to the standards.

关 键 词：通信车 场线耦合 比较距离 电磁兼容 整改 

分 类 号：TN03[电子电信—物理电子学]