EMC基础知识---华为

课程说明...................................................................................................................................1 课程介绍.....................................................................................................................................1 培训目标.....................................................................................................................................1 参考资料.....................................................................................................................................1 第1章 序论...............................................................................................................................2 1.1 电磁兼容概述........................................................................................................................2 1.2 电磁兼容性的基本概念.........................................................................................................2 1.2.1 电磁骚扰与电磁干扰..................................................................................................2 1.2.2 电磁兼容性(EMC-Electromagnetic Compatibility）...................................................2 1.2.3 电磁兼容常用名词术语..............................................................................................3 1.3 电磁干扰...............................................................................................................................3 1.3.1 电磁干扰三要素.........................................................................................................3 1.3.2 电磁兼容研究的主要内容...........................................................................................4 1.4 基本的电磁兼容控制技术.....................................................................................................4 1.5 电磁兼容标准........................................................................................................................5 1.5.1 电磁兼容标准的制订..................................................................................................5 1.5.2 EMC标准拟订的理论基础...........................................................................................7 1.5.3 电磁兼容标准的分类..................................................................................................7 1.5.4 产品的电磁兼容标准遵循原则....................................................................................8 1.6 电磁兼容测试技术简介.........................................................................................................9 1.6.1 概述...........................................................................................................................9 1.6.2 EMC测试项目.............................................................................................................9 1.6.3 电磁发射....................................................................................................................9 1.6.4 抗扰性EMS................................................................................................................9 1.7 EMC测试结果的评价...........................................................................................................10 1.8 产品EMC设计的重要性......................................................................................................10 1.9 产品的认证.........................................................................................................................11 小结：......................................................................................................................................12 思考题：...................................................................................................................................12 第2章 EMC基础理论..............................................................................................................13 2.1 电磁骚扰的耦合机理...........................................................................................................13 2.1.1 引言.........................................................................................................................13 2.1.2 电磁骚扰的常用单位................................................................................................13 2.1.3 传导干扰..................................................................................................................15 2.1.4 辐射干扰..................................................................................................................16 2.2 电磁干扰的模式..................................................................................................................17 2.2.1 共模干扰与差模干扰................................................................................................17 LA000201 EMC 基础知识 ISSUE1.0 目 录 iii 2.2.2 PCB的辐射与线缆的辐射.........................................................................................18 2.3 电磁屏蔽理论......................................................................................................................19 2.3.1 屏蔽效能的感念.......................................................................................................19 2.3.2 屏蔽体上孔缝的影响................................................................................................20 2.4 电缆的屏蔽设计..................................................................................................................20 2.5 接地设计.............................................................................................................................21 2.5.1 接地的概念...............................................................................................................21 2.5.2 接地的种类...............................................................................................................21 2.6 滤波设计.............................................................................................................................22 2.6.1 滤波电路的基本概念................................................................................................22 2.6.2 电源EMI滤波器........................................................................................................22 小结：......................................................................................................................................23 思考题：...................................................................................................................................23 第3章系统安装和维护...........................................................................................................24 3.1 系统安装的EMC要求..........................................................................................................24 3.1.1 概述.........................................................................................................................24 3.1.2 系统环境要求...........................................................................................................24 3.1.3 防整机安装...............................................................................................................24 3.1.4 电缆布线要求...........................................................................................................25 3.2 系统维护.............................................................................................................................27 3.2.1 防静电要求...............................................................................................................27 3.2.2 系统检视..................................................................................................................27 3.2.3 系统干扰问题的处理................................................................................................27 小结：......................................................................................................................................28 思考题：...................................................................................................................................28