基于脉冲编码控制的开关转换器电磁干扰减低研究  

Research on EMI Reduction of Switching Converter based on Pulse Coding Control

作　　者：杨建宇[1] YANG Jian-yu(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学,辽宁沈阳110142

出　　处：《化工管理》2022年第7期111-114,共4页Chemical Engineering Management

摘　　要：科技生产过程中,开关转换器是电子设备中不可缺少的一部分,开关转换器有降压型、升压型和升降压型三种。很多电子设备普遍存在的共同问题就是电磁干扰噪声,这种噪声产生的原因主要由于开关转换器的工作频率和电流容量较大,这时设备运行所需的大电流就会产生很强的噪声,进而对电子设备造成影响。电磁干扰减低技术是目前生产中必不可少的技术之一;基本降压转换电路是日常生产生活中常用的基础电路;扩展频谱时钟技术是电磁干扰减低技术中应用的非常广泛的针对控制电路改装的一种实用方法;SEPIC转换器是一种升降压式开关转换器,也是电磁干扰减低技术中针对电源电路替换改造的一种效用优良的变换器。文章主要采用线性扫描技术实现电磁干扰噪声减低。In the process of scientific and technological production,switching converters are an indispensable part of electronic equipment.There are three types of switching converters:step-down,step-up and step-up.The common problem of much electronic equipment is electromagnetic interference noise.The reason for this noise is mainly due to the large working frequency and current capacity of the switching converter.At this time,the large current required for the operation of the equipment will produce strong noise,which will affect the electronic equipment.Electromagnetic interference reduction technology is an essential technology in current production.The basic step-down chopper circuit is the basic circuit commonly used in daily production and life.Spread spectrum clock technology is widely used in electromagnetic interference reduction technology,it is a practical method for refitting control circuit.SEPIC converter is a kind of up-down switching converter,it is also an effective converter for the replacement and transformation of power circuit in electromagnetic interference reduction technology.

关 键 词：电磁干扰减低 扩展频谱时钟 降压转换电路 SEPIC转换器 线性扫描技术 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]