开关电源EMI滤波器的设计  

Designing EMI Filter and Simulation

作　　者：王金霞[1] 杨庆江[1] 王金凤 

机构地区：[1]黑龙江科技学院电信学院,哈尔滨150027 [2]太平洋线路板公司,辽宁大连116001

出　　处：《煤炭技术》2009年第5期33-35,共3页Coal Technology

摘　　要：文章首先分析了开关电源电磁干扰问题产生的原因及种类,建立开关电源EMI滤波器的共模和差模等效模型以分析噪声的传播方式,结合滤波器所需对应的开关电源工作频率为基础来设计滤波器,无需复杂的计算,对不同工作频率的开关电源有较强的针对性。最后通过实例验证了此设计方法的可行性。In this paper first of all the category and causes of the switching mode power supp ly EMI are analyzed.Second build the equivalent models for common mode and di fferential mode of switching power supply EMI fi lter,this procedure is based on the analysis of noise and the frequency of SMPS.This procedure needs no complex computing and fits SMPS with certain frequency well.Lastly,the feasibility of this design method is verified by simulation.

关 键 词：滤波器 开关电源 噪声 仿真 电磁干扰 

分 类 号：TN713[电子电信—电路与系统]