DC-DC变换电路差模传导电磁干扰预测模型研究  

Research on Predicting Model of Differential Mode Conducted EMI in DC-DC Converter Circuit

作　　者：吴晓静[1] 韩素敏[1] 艾永乐[1] 谢东垒[1] 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《测控技术》2017年第1期140-143,共4页Measurement & Control Technology

基　　金：河南省控制工程重点学科开放基金资助项目(KG2011-08);河南省教育厅科学技术研究重点项目(14A510022)

摘　　要：针对DC-DC变换电路差模传导电磁干扰信号难以提取的问题,通过分析直流人工电源网络(DCLISN,DC line impedance stabilization network)的网络特性,建立基于PSpice的差模传导干扰预测模型。该模型采用的DC-LISN可实现直流信号的正向传输、高频干扰信号在测试段无衰减提取的功能。通过PSpice仿真和实验分别提取了电源侧差模传导干扰的时域波形并进行频谱分析,结果表明,基于DCLISN的PSpice差模传导干扰预测模型与实际测试结果在幅值和频谱成分方面吻合较好,从而证明了该模型对预测实际变换器产生的差模干扰是有效的。In order to solve the problem of DC-DC converter circuit whose differential mode conductive electro- magnetic interference （EMI） signal is difficult to be extracted, the differential mode conductive EMI predictive model based on PSpice is established by analyzing the network characteristics of DC line impedance stabiliza- tion network（ DC-LISN）. DC-LISN, the constituent element of this mode, has the functions in transmissing for- word DC signal and extracting the high frequency interference signal without attenuation in the test frequency band. The time domain waveforms of the differential mode conducted interference in the power side are extrac- ted by PSpice simulation and experiment, their frequency spectrums are analyzed. The results indicate that the PSpice predicting model based on DC-LISN is consistent with the actual test results in terms of the amplitude and frequency spectrum contents, thus validates that the model is effective in predicting the differential mode conducted EMI of the actual converter.

关 键 词：直流人工电源网络 差模传导干扰 PSPICE仿真 DC-DC变换器 

分 类 号：TM937.3[电气工程—电力电子与电力传动]