摘要
ZVS全桥变换器在中大功率变换场合得到了广泛的应用,但传统的移相全桥变换器同时也存在一些缺点,如软开关范围窄、占空比丢失、二次侧寄生振荡和环流损耗大等。针对这些缺点,国内外学者相继提出了许多改进方法。该文针对一些具有代表性的辅助网络技术进行了归类,结合特性分析比较了各方案的优势与不足,并提出了一种将自适应网络与并联型无源辅助网络结合后的新型自适应辅助网络。根据所提出的新型变换器拓扑,搭建了一台原理样机验证理论分析的正确性。最后对各加辅助网络的变换器优缺点进行了归纳总结。
The phase-shifted full-bridge zero voltage switching （ZVS） DC-DC converter is widely adopted in industry applications. But it has some shortcomings, such as narrow ZVS range, excessive duty cycle loss, severe parasitic oscillation, and large circulating loss and so on. Some improved methods were proposed to solve such shortcomings. In this paper, several auxiliary networks were classified hence the key performances of these topologies were analyzed and compared. Moreover, a new auxiliary network was proposed, combined with adaptive network and parallel passive auxiliary network. And then, the prototype of the proposed converter was built. Finally, the advantages and disadvantages of these auxiliary networks were summarized.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第22期89-99,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51377078)
江苏省"六大人才高峰"资助项目(2014-JNHB024)
台达环境与教育基金会<电力电子科教发展计划>(DREG2012002)项目资助
关键词
零电压开关
全桥变换器
拓扑比较
辅助网络
Zero voltage switching, full-bridge converter, topology comparison, auxiliary network
