本指南旨在对交流和直流应用中使用的电磁干扰（EMI）电源线滤波器的应用、评估和安全注意事项提供基本了解。它包括EMI电源线滤波器的结构及其抑制传导噪声的功能的基本描述。此外，它还解释了为什么看似相同的过滤器在特定应用中可能无法提供相同的性能。 最后，讨论了这些过滤器在设备中的正确安装。

This guide is intended to provide a basic understanding of the application, evaluation, and safety considerations of electromagnetic interference (EMI) power-line filters used in both ac and dc applications. It includes a basic description of the construction of an EMI power-line filter and its functions in providing suppression of conducted noise. In addition, it provides explanations of why seemingly identical filters may not give the same performance in a particular application. Finally, proper installation of these filters in equipment is discussed.