基于移相全桥ZVS及同步整流的低压大电流直流变换器研究  

A Research on the Low-voltage High-current DC Converter Based on Phase-shift Full-bridge ZVS and Synchronous Rectification

作　　者：韩一[1] 聂子玲[1] 朱俊杰[1] 

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《电气自动化》2016年第2期7-10,共4页Electrical Automation

基　　金：国家自然科学基金资助项目(51407189)

摘　　要：解决开关电源的功率损耗问题是提高电源效率、性能、可靠性的关键。传统低压大电流直流变换器,使用二极管整流,难以实现在高电流输出情况下降低损耗。选择了综合全波整流和桥式整流两者优点的倍流整流器,并且使用MOSFET并联同步整流技术,结合了变压器原边移相全桥ZVS电路,实现了28.5 V/400 A的低压大电流输出。基于双环控制,搭建了直流变换器模型与实验平台,通过仿真与实验验证,证明了电路拓扑以及控制策略的可行性。The solution of power loss of switching power supply is the key to the improvement of power supply efficiency,performance and reliability. Traditional low-voltage high-current DC converter using diode for rectification purpose can hardly reduce loss under highcurrent output circumstances. In this paper,a current-doubler rectifier combining advantages of both full-wave rectification and bridge rectification is chosen,and MOSFET parallel synchronous rectification technology combined with transformer original-side phaseshifted full-bridge ZVS circuit,we can achieve low-voltage high-current output of 28. 5V /400 A. Based on dual-loop control,we build up a DC converter model and experimental platform,and make system simulation and experimental verification. The results of simulation and verification verify the feasibility of the circuit topology and control strategy.

关 键 词：低压大电流 倍流整流 同步整流 MOSFET并联 系统移相全桥 

分 类 号：TN624[电子电信—电路与系统]