EMI滤波器特性分析  

Analysis of the Character of EMI Filter

作　　者：高峰涛[1] 张姝瑶[1] 王涵[1] 王煜[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

出　　处：《电子科技》2008年第9期5-7,共3页Electronic Science and Technology

摘　　要：文中给出了一般EMI滤波器的拓扑结构,分别指出其共模和差模等效电路,并对共模和差模等效电路进行化简。且分别对共模和差模电路中电容大小与插损的关系以及共模,差模电路两端输入输出阻抗与插损的关系作了仿真分析。结果表明,共模电容越大,插入损耗越大;共模滤波器两端的阻抗越小,插入损耗越大;差模电容越大,插入损耗越大;差模滤波器两端阻抗越大,插入损耗越大。The topological structure of generic EMI filter is given. The equivalent and simplified circuits of the common-mode and differential-mode are discussed, Both the relationship between the value of the capacitance in the common-mode and the differential-mode circuits and that between the input/output resistance and the insert loss are analyzed. The simulation result shows that the larger the common-mode capacitance, the greater the insert loss; the smaller the resistance of the two ends of the filter, the greater the insert loss; the larger the differential-mode capacitance, the greater the insert loss ; the larger the resistance of the two ends of the differential-mode filter, the greater the insert loss.

关 键 词：电磁干扰 滤波器 共模 差模 

分 类 号：TN713[电子电信—电路与系统]