一种新的传导型共模／差模EMI分离测试网络

A Novel Common and Differential Mode Noise Separation of Conducted EMI

传统的传导型电磁干扰(EMI)噪声的测试多为混合测试或分时分离测试,由于共模和差模EMI噪声没有完全分离或不为同一时刻的值,因此其测试结果不够精确。本论文针对传导型共模、差模EMI噪声产生机制的不同,给出了一种可同时测量共模/差模噪声的分离测试网络,该分离测试网络基于一种简单的测试等效电路。本文给出了该分离测试网络的电路原理及仿真结果。仿真结果表明该分离测试网络的分离测试效果良好。

Typical testing methods of conducted electromagnetic interference （EMI） almost are hybrid test and separated test at separated time. The conventional measurements are not very precise due to the common mode noise and differential mode noise are not separated completely or not tested at the same time. Aim at the different causes and producing principles of common mode noise and differential mode noise, a novel CM/DM noise separating network of the conducted EMI is proposed in this paper, which can be used to measure common mode/differential mode noise at the same time. The novel CM/DM noise separating network is based on a simple testing equivalent circuit. The design principle of the testing circuit and the simulation results of the novel CM/DM noise separating network are introduced in this paper. Moreover, the simulation results show the separated measurements are good while adopting the CM/DM noise separating network presented in this paper.