开关电源噪声的产生与抑制

Generation and Control of the Switching Power Supply Noise

近年来,电磁干扰问题越来越成为电子产品的一个严重问题,电磁兼容技术日益成为许多技术人员重视的技术。开关电源是电子系统中的一种主要的干扰源之一,同时它的电磁兼容问题也是较难解决的。针对此分析了开关电源工作时噪声产生的原因,噪声对其它电子设备产生干扰的途径,并从电路设计、结构工艺两个方面提出了抑制噪声干扰的措施。

In recent years, electromagnetic interference increasingly become a serious problem for electronic products, the electromagnetic compatibility technology is becoming increasingly important technology for many technical staffs. The switching power supply is a major source of interference in electronic systems, while the problem of its electromagnetic compatibility is more difficult to be solved. The paper analyzes the noise causing reason of switching power supply, the interference way to the other electronic devices, and proposes the measures to suppress noise interference from the aspects of circuit design and structure technology.