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
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