摘要
提出一种全桥副边双谐振(full-bridge secondary-dual-resonance,FB-SDR)DC-DC变换器。变换器无需添加辅助电路即可在全负载范围内实现开关管的零电压开关和副边整流二极管的零电流关断,减小了开通损耗和反向恢复损耗;同时,采用不对称控制策略,消除了传统移相全桥变换器的环流损耗,提高了变换器的效率;有效抑制了整流二极管的电压尖峰和振荡,将整流二极管电压箝位在输出电压,减小了电压应力,进一步提高了变换器的性能。详细研究FB-SDR变换器的工作原理及稳态特性,并对电路关键参数进行设计。最后,通过搭建一台1 kW、400 V/48 V的实验样机,验证理论分析的正确性。
An asymmetrical full-bridge secondary dual resonance （FB-SDR） DC-DC converter is proposed. Without auxiliary circuits, the proposed converter can achieve zero voltage switching （ZVS） for the power switches and zero current switching （ZCS） for the rectifier diodes in the entire operating range. The switching losses and diode reverse-recovery losses are thus decreased. The circulating current loss is eliminated with the asymmetrical PWM strategy. Moreover, the proposed converter efiminates the ,~oltage spike and oscillation of the rectifier diodes, clamps the diode voltage at the output voltage to decrease the voltage stress of the rectifier diodes. The analysis and design considerations of the converter are presented. Finally, experimental results from a l kW 400V/48V prototype were presented to verify the analysis of the proposed converter.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第27期78-87,12,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51177140)
中央高校基本科研业务费专项资金资助(2682013ZT20)~~
关键词
移相全桥
谐振
零电压开关
零电流开关
phase-shift full-bridge
resonant
zero voltage switching
zero current switching
