反激式开关电源传导电磁干扰的研究  

Study on Conducted EMI in Flyback Switching DC Power Supply

作　　者：张伶鳦 陈长兴 赵隆冬[1] ZHANG Ling-yi;CHEN Chang-xing;ZHAO Long-dong(No.43 Research Institute of CETC,Hefei 230088,China)

机构地区：[1]中国电子科技集团公司第四十三研究所,合肥市230088

出　　处：《混合微电子技术》2018年第4期22-27,39,共7页Hybrid Microelectronics Technology

摘　　要：随着开关电源向高频化、集成化方向发展,其电磁干扰问题的研究越来越重要。本文以反激式开关电源为研究对象,建立了电源传导电磁干扰模型,分析了主要干扰源和干扰耦合路径,使用Saber软件对传导EMI进行仿真,并分析了电路参数对电磁干扰的影响。采用EMI滤波器抑制开关电源的EMI,以改善开关电源的传导EMI,进行仿真分析与试验验证,证明了该方法的有效性。With the development of switching DC power supply to the direction of high-frequency and integration,the study on its electromagnetic interference(EMI)has become increasingly important.In this paper,the flyback switching power supply is taken as the research object.The power conduction electromagnetic interference model is established.The main interference source and interference coupling path are analyzed.The Saber software is used to simulate the conducted EMI,and the influence of circuit parameters on electromagnetic interference is analyzed.EMI filter is used to suppress the EMI of switching power supply in order to improve the conduction EMI of switching power supply.The simulation analysis and experimental verification prove the effectiveness of this method.

关 键 词：开关电源 传导EMI EMI滤波器 SABER 

分 类 号：TN86[电子电信—信息与通信工程] TN718