EMI电源滤波器的插入损耗分析  

Analysis of the Insertion Loss of the EMI Filter

作　　者：滑瑞霞[1] 张磊[1] 龙慧[2] 

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]西北工业大学电子信息学院,陕西西安710072

出　　处：《电子科技》2011年第1期65-67,共3页Electronic Science and Technology

摘　　要：在一般EMI滤波器的共模和差模等效电路的基础上,分析了源阻抗和负载阻抗对滤波器插入损耗的影响。提出了共模插入损耗和差模插入损耗的计算方法,推导了滤波器插入损耗与阻抗关系的表达式,并且对这一关系作了仿真分析,仿真结果验证了理论计算和分析的正确性。Based on the equivalent circuits of common-mode and differential-mode for the genetic EMI filter, this paper analyzes the effects of the source and load impedances on the insertion loss of filters in detail. A method to calculate the insertion loss of common-mode and differential-mode is presented. This paper derives the relation between insertion loss of the EMI filter and the impedance. The simulation of this relationship is discussed. Results have verified the correctness of the theoretical calculation and analyses.

关 键 词：EMI滤波器 插入损耗 共模 差模 

分 类 号：TN713[电子电信—电路与系统]