摘要
对带有高PF(功率因数)反激式的开关电源的电磁干扰进行了分析。为实现开关电源的EMC(电磁兼容),在设计过程中采用了EMI滤波器。在探讨EMI滤波器的设计原则基础上,分析了高频分布参数对滤波器频率特性的影响,通过设计和调整滤波器的结构及器件参数,实现了EMI传导干扰的有效抑制,使带有高PF反激式的开关电源达到灯具的EMI标准。
Electromagnetic interference in high-PF flyback switching power supply is analyzed.EMI filter is designed to achieve EMC of Switching power supply.On the discussion of principles of EMI filter design,effect of high-frequency distribution parameters on the frequency characteristics of filter is determined.Design and adjustment of filter on their structures and parameters can effectively suppress conducted interference and help flyback switching power supply with high-PF to meet the EMI standard of lamps.
出处
《电子器件》
CAS
2009年第4期824-827,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金资助(60671024)
浙江省自然科学基金资助(Y107255)
