由电磁骚扰源发射的电磁能量经耦合途径传输到敏感设备,这个过程称为电磁干扰效应。因此,形成电磁干扰必须具备三个基本要素,即骚扰源、耦合通道和敏感设备。换言之,只要去除其中任何一个要素,就能解决电磁兼容问题。从根本上来说,去除这些要素只有三种方法:滤波、屏蔽、接地。但如何实现呢?除了有效的电路设计外,电磁兼容器件就成为解决问题的关键。下面就一些基本的电磁兼容器件知识进行介绍。 The electromagnetic energy emitted by the electromagnetic disturbance source is transmitted to the sensitive equipment through the coupling path. This process is called electromagnetic interference effect. Therefore, the formation of electromagnetic interference must have three basic elements, namely, the source of harassment, coupling channels and sensitive equipment. In other words, as long as you remove any one element, you can solve the problem of electromagnetic compatibility. Basically, there are only three ways to remove these elements: filtering, shielding, grounding. But how to achieve it? In addition to effective circuit design, EMC devices become the key to solve the problem. Here are some basic knowledge of electromagnetic compatibility devices are introduced.