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本文主要是对产生开关电源中引起电磁干扰的因素进行了介绍,设计开关电源电磁干扰(EMI)滤波器模型从而对噪声传播方式进行了分析,滤波器设计的基础主要是围绕着滤波器相应的开关电源对应的工作频率,计算简单,开关电源的工作频率不同,那么就会对应着不同的滤波器,接着本文介绍了相关的实例,进而说明设计的可行性。
This article mainly introduces the factors that cause EMI in the switching power supply, designs the electromagnetic interference (EMI) filter model of the switching power supply to analyze the noise propagation mode, and the basis of the filter design is mainly around the corresponding filter Switching power supply corresponding to the operating frequency, the calculation is simple, switching power supply different operating frequency, then it will correspond to a different filter, then this article describes the relevant examples, and then shows the feasibility of the design.