LED驱动电源铁氧体磁珠抑制传导干扰研究  

Solution of Conducted EMI for LED Drive Power Using Ferrite Magnetic Bead

作　　者：魏秀梅[1] 秦会斌[1] 

机构地区：[1]杭州电子科技大学电子信息学院,杭州310018

出　　处：《电子器件》2014年第4期601-604,共4页Chinese Journal of Electron Devices

基　　金：杭州电子科技大学研究生优秀毕业论文培育基金项目

摘　　要：为解决LED驱动电源传导电磁干扰问题,进行了铁氧体磁珠抑制传导干扰的研究,讨论了LED驱动电源传导EMI产生的原因及噪声传播路径、铁氧体磁珠的特性、铁氧体磁珠抑制LED驱动电源传导EMI的原理.通过在LED驱动电源主要噪声传播路径中串入铁氧体磁珠,可以有效抑制LED驱动电源传导电磁干扰,并在一款3线LED驱动电源上进行传导测试,实验测试结果表明铁氧体磁珠能很好的抑制LED驱动电源的传导EMI。To solve the problem of conducted electromagnetic interference（ EMI） for LED drive power,the study on the ferrite magnetic bead restraining interference is introduced,the cause of conducted EMI,the propagation path of the EMI noise for LED drive power, the characteristics of ferrite magnetic bead, the principle of restraining theconducted EMI of ferrite magnetic bead in conducted EMI for LED drive power are discussed. The conducted EMI for LED drive power can be effectively restrained by adding the ferrite beads in the propagation path of the EMI noise for LED drive power and get a conducted test on a three-wire LED drive power. The experimental result shows that the ferrite magnetic bead can restrain the conducted EMI for LED drive power very well.

关 键 词：LED驱动电源 传导EMI 铁氧体磁珠 传导EMI抑制 

分 类 号：TN312.8[电子电信—物理电子学] TM135.5[电气工程—电工理论与新技术]