集成EMI滤波器原理与设计  

Principles and Design on Integrated EMI Filters

作　　者：温志伟[1] 伍晓峰[1] 徐德鸿[1] Okuma Yasuhiro Mino Kazuaki 

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]Fuji Electric Systems Co.Ltd Tokyo Japan [3]Fuji Electric Advanced Technology Co.Ltd Tokyo Japan

出　　处：《电工技术学报》2011年第9期160-166,共7页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展专攻基金资助项目(2007AA05Z243)

摘　　要：利用柔性多层带材,提出了一种Electromagnetic Interference(EMI)滤波器的集成结构。该结构单独设计了差模绕组,并将滤波器中所有无源元件都集成在同一磁心中。文章通过建立集成滤波器的分布模型,从差、共模电流分布和磁路的角度,分别阐述了差、共模电感的集成原理,并给出了计算公式和集成结构的设计要点。实验部分比较了在不同差模电感下,差模插入损耗特性和EMI测试结果。实验表明,集成滤波器比分立滤波器体积更小,高频特性改善显著。This paper proposes an integrated structure for EMI filter based on the flexible multi-layer foil（FML foil）.The DM windings are designed and all the passive components are integrated in one core.In this paper,the distributed circuit of the filter is given firstly,and then the integrated principle of DM CM inductance is explained respectively,according to the DM CM distributed current and equivalent magnetic circuits.The theoretic equations and the main design points are also given.The DM insert loss curves are compared under different DM inductance.The experiments show the proposed structure has smaller volume and better performance,compared with traditional EMI filters.

关 键 词：无源集成 柔性多层带材 EMI滤波器 

分 类 号：TN713[电子电信—电路与系统]