开关电源输入EMI滤波器设计与仿真  

Design and Simulation of Switching-Mode Power Supply Input EMI Filters

作　　者：曹丽萍[1] 张勋 陈晨[1] 刘韬[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071 [2]河北省清河县电力局输变电工区,河北邢台054800

出　　处：《电子科技》2010年第4期42-44,49,共4页Electronic Science and Technology

摘　　要：开关电源中常用EMI滤波器抑制共模干扰和差模干扰。三端电容器在抑制开关电源高频干扰方面有良好性能。文中在开关电源一般性能EMI滤波器电路结构基础上,给出了使用三端电容器抑制高频噪声的滤波器结构。并使用PSpice软件对插入损耗进行仿真,给出了仿真结果。The electromagnetic interference（EMI） filter is used to suppress common-mode interference and dif- ferential-mode interference. Three-terminal capacitance performs well in suppressing high frequeney interferenee. A structure of the switching-mode power supply EMI filter using three-terminal capacitance is presented to suppress high frequency noise based on the structure of the generic EMI filter in this paper. The insertion loss of the designed filter is simulated using Pspice, and the results are given.

关 键 词：开关电源 EMI滤波器 三端电容器 插入损耗 

分 类 号：TN86[电子电信—信息与通信工程]