一种基于频率同步的低噪声电源适配器设计  

A Low Noise Power Adapter Design with Frequency Synchronization

作　　者：包尔恒[1] 何玲[1] 高军 周小义 BAO Erheng1. ,HE Ling1 ,GAO Jun2 ,ZHOU Xiaoyi2(1. Guangdong Technical College of Water Resources and Electric Engineering, Guangzhou 510925, China ; 2. Shenzhen ME GMEET Electrical Co., Ltd., Shenzhen Guang dong 518057, China)

机构地区：[1]广东水利电力职业技术学院自动化工程系,广州510925 [2]深圳麦格米特电气股份有限公司,广东深圳518057

出　　处：《电子器件》2017年第5期1126-1129,共4页Chinese Journal of Electron Devices

基　　金：广东水利电力职业技术学院"一流高职"科学研究和社会服务能力建设项目(cy060402y02)

摘　　要：针对电源适配器高频开关信号的噪声干扰对某些精密仪器性能(如B超机显示清晰度)的影响问题,提出通过适配器开关频率和系统设备工作频率同步方式解决噪声干扰的设计思路。以便携式B超机电源适配器设计实践为例,介绍了同步电路的设计方法、功率电路拓扑和辅助电源方案。同步功能通过实验验证,采用该方案的电源适配器已成功应用于某全球知名B超机产品。Based on the problem that noise interference from high-frequency switching signal of power adapter affects the performance of some precision instruments such as B ultrasound machine display clarity,a design idea of frequency synchronization between the adapter switching frequency and system operating frequency is presented. By portable B ultrasonic machine power adapter design as an example,the design method of synchronizing circuit and design schemes of power circuit topology and auxiliary power are introduced. By test,the power adapter has the frequency synchronization function and has been successfully applied to the world-famous B ultrasound machine products.

关 键 词：噪声干扰 频率同步 B超机 不对称半桥 

分 类 号：TM46[电气工程—电器]