EMI滤波器在反激式开关电源中的研究与实现  

Design and Implementation of EMI-Filter to the Flyback Switching Power Supply

作　　者：刘正青[1] 曾志刚[1] 

机构地区：[1]湖南工程学院电气与信息工程系,湖南湘潭411101

出　　处：《电子器件》2006年第2期462-465,共4页Chinese Journal of Electron Devices

摘　　要：电源技术的发展使得体积小、高效能、高可靠性“绿色电源”成为下一代电源的发展趋势。但开关电源由于本身工作特性使得电磁干扰问题相当突出,电源作为一个电子系统中重要的部件,其可靠性决定了整个系统的可靠性。EMI(Electromagnet-icInterference)滤波器是由电感、电容等构成的无源双向多端口网络,能衰减共模和差模干扰,提高电子仪器、计算机和测控系统的抗干扰能力及可靠性。在研究了EMI滤波器原理基础上,提出了EMI滤波器在反激式开关电源中的设计与实现。＂The green-line＂ power supply is becoming pre-requisting based on the development of power supply ＇ stechnology with microminiaturization, high energy efficency, high credibility. Because of the power supply＇s working identity , the electromagnetic jamming is very serious,power supply is so important that it＇s credibility determine the credibility of system. Electromagnetic interference filter is bilateral multipoint network without sourse made of inductance and capacitance, decreasing the common-mode and differential-mode jamming to increase the credibility of electronic instrument,computer,the metriaI control system. based on studying the principle of EMI-FILTER , giving the design and implementation of EMI-filter to the flyback switching power supply.

关 键 词：电磁干扰 EMI滤波器 共模 差模 

分 类 号：TN973.3[电子电信—信号与信息处理]