基于数字控制的移相全桥ZCT变换器  

Phase-shift full-bridge ZCT converter based on digital control

作　　者：刘星桥[1] 赵永建[1] 张运芳[1] 王斌[1] 陈光菊[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2009年第5期505-509,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省工业科技攻关项目(BE2006090);江苏省高校自然科学基金资助项目(05KJD470048)

摘　　要：基于对多种全桥零电流变换器的研究,提出一种新型的零电流转换(ZCT)PWM全桥DC/DC变换器.运用辅助电路的谐振电感实现主开关管的软开通,在全负载范围内实现所有有源开关管的零电流开关(ZCS)和输出整流管的软换流.采用ARM芯片LPC2214作为控制器,设计了变换器数字控制系统,成功研制了一台1 kW,25 kHz的软开关电源,并进行了电路试验.结果表明,基于该拓扑的数字控制PWM全桥变换器损耗小、成本低,变换器的最高效率超过了91%,具有较好的发展前景.Based on the study of many full-bridge ZCT（zero current transition） converters, a novel ZCT PWM full-bridge DC/DC converter was proposed. The soft-switching of main switches is completed by using the resonant inductor auxiliary circuit. The ZCS（ zero current switching） of all active switches and output rectifier diodes soft commutation is realized in entire load ranges. The digital control system was designed by using ARM chip LCP2214. A 1 kW, 25 kHz soft-switching power supply was developed and the circuit experiments were carried out. The results show that this digital control PWM full-bridge converter which employs the proposed topology has lower loss and lower cost, and the maximum efficiency exceeds 91% , which shows a great prospect for future applications.

关 键 词：DC/DC变换器 ZCT 移相 数字控制系统 软开关 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]