传导性电磁干扰噪声的诊断与抑制方法  

Discussion of Conductive EMI Noise Diagnosis and Suppression

作　　者：蔡骏[1] 沈雪梅[2] 尹海平[2] 赵阳[1] 李世锦[2] 

机构地区：[1]苏州泰思特电子科技有限公司 [2]南京师范大学电气与自动化工程学院

出　　处：《安全与电磁兼容》2006年第6期64-68,共5页Safety & EMC

摘　　要：传导性EMI的测试主要是通过线性阻抗稳定网络(LISN)进行的,但测得的结果是共模(CM)噪声和差模(DM)噪声的混合信号,而滤波器的设计分为共模和差模两个部分。介绍传导性电磁干扰噪声的分离技术及EMI滤波器的阻抗匹配问题。通过实例证明,传导性电磁干扰噪声分离网络能对共模和差模噪声进行有效地诊断,为正确选用抑制噪声的EMI滤波器提供依据。The conventional testing for compliance to conductive EMI emission utilizes a Line Impedance Stabilization Network （LISN）, But it can only measure the total conducted EMI and cannot detect the CM and DM components, The design procedure for EMI filter is divided into common mode and different mode filters. This paper concentrates on conductive EMI noise Diagnosis and impedance matching of EMI filter Design. Experiments show that discrimination network is effective, and there is also a method to choose the correct component values for EMI filter.

关 键 词：电磁干扰 噪声诊断 噪声抑制 阻抗 噪声分离网络 

分 类 号：TN03[电子电信—物理电子学]