一种等离子显示系统专用电源  

A Dedicated Power Supply for PDP

作　　者：耿丙群[1] 张洪进[1] 董胜亮[1] 袁题训[1] 韦统安[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100

出　　处：《现代电子技术》2011年第22期202-205,共4页Modern Electronics Technique

基　　金：国家"863"计划资助项目(2006AA09Z231)

摘　　要：设计了一个用于多屏拼接等离子显示系统的专用电源。该电源采用两级变换,前级AC/DC变换采用Boost型有源功率因数校正电路,后级变换器对于不同的回路根据功率的大小分别采用全桥变换器和单端反激变换器。对传统Boost型功率因数校正电路提出了一点改进,有效抑制了传统Boost型功率因数校正电路中大功率时开关管开通时二极管上瞬时大电流。后级变换器中主回路采用一种次级无源箝位ZVZCS全桥变换器,适宜大功率的输出且有效降低了开关损耗。A dedicated power supply was designed for multi-screeen PDP with two-level transformation.The Boost PFC circuit is adopted in the first stage AC/DC transformation,and the full-bridge converter or single-end flyback converter is used in the second stage according to the size of the power supply of different circuits.An improved method is proposed for the customary Boost PFC circuit to effectively suppress the instantaneous large current when opening switch tube in high-power cases.In the main circuit of the second stage,a secondary passive ground-clamp ZVZCS full-bridge converter suitable for high-power output is employed.It can with reduce the switch loss effectively.

关 键 词：等离子屏 开关电源 功率因数校正 全桥变换器 零电压零电流软开关 

分 类 号：TN919-34[电子电信—通信与信息系统]