一种高效同步整流有源箝位缓冲全桥DC/DC电路  

A High Efficiency Active Clamp Snubber of Synchronous Rectification Full-bridge DC/DC Circuit

作　　者：李银宝 林维明[1] 葛良安 童兴 

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]英飞特电子股份有限公司,浙江杭州310051

出　　处：《电力电子技术》2018年第3期8-10,21,共4页Power Electronics

基　　金：福建省科技厅重大项目(2014H6012)~~

摘　　要：随着电力电子技术的发展,为提高功率密度和控制动态响应,电力电子朝着高频化方向发展,但导致了开关器件承受较大的电压应力和产生较大的热量,研究可靠的缓冲电路能有效抑制开关管电压尖峰,减小开关损耗。本文提出了一种高效同步整流有源箝位缓冲全桥DC/DC电路,详细分析了该电路的工作原理、工作过程,并通过理论分析及公式推导对关键参数进行设计。开展了仿真研究和2 kW全桥DC/DC实验样机设计与实验,验证了所提有源箝位方案具有显著的电压尖峰抑制效果、能量回馈和效率高、方便控制等优点。With the development of power electronics, to improve the power density and control dynamic response, the high frenquency of switching power supply causes the more voltage stress and hot, and need a reliable snubber circuit to reduce the spike and the loss.A high efficiency active clamp snubber of synchronous rectification full-bridge DC/ DC converter is researched.The working principle of this snubber is analyzed based on the full-bridge DC/DC converter.And all parameters are designed based on the theoretical analysis.A energy recycling and high efficiency with much low spike and easy eonrol is achieved in the proposed subber.The conclusion is verified by simulation and 2 kW experimental prototype.

关 键 词：同步整流 全桥电路 缓冲电路 有源箝位 

分 类 号：TM461[电气工程—电器]