电工技术学报2018，Vol.33Issue(7)：1461-1471,11.DOI:10.19595/j.cnki.1000-6753.tces.162026
一种双CLT谐振软开关直流变换器设计与实现
The Design and Implementation of a Dual-CLT Resonant Soft-Switching DC-DC Converter
摘要
Abstract
In this paper, a dual-CLT resonant soft-switching DC-DC converter is proposed. By the implementation of the dual-transformer structure, the voltage gain curve of the converter not only has two resonance frequency points, but also possesses a unique zero point, which extremely extends the output voltage range and ensures the output voltage adjustable within the range from zero to rated value. The converter guarantees the switches turn-on zero voltage switching (ZVS), and the diodes turn-on quasi zero current switching (Q-ZCS) and turn-off ZCS within full load range. From half load to rated load range, turn-off Q-ZCS characteristics for switches are achieved, while at light load, the turn-off losses diminish as well. Consequently, the switching losses are weakened efficiently. Besides, in the dual-CLT structure, the leakage inductors of the two transformers can be integrated into the resonant inductors, which relieves the side effects caused by leakage inductors. At last, a 1kW prototype is designed in this paper, and its maximum efficiency reaches 95.3%. The experiments also verify the reliability of the theoretical analysis.关键词
软开关/谐振/变压器/高效率/直流变换器Key words
Soft switching/resonance/transformer/high efficiency/DC-DC converter分类
信息技术与安全科学引用本文复制引用
杨良,王议锋,陈博,郄伟,钟旭..一种双CLT谐振软开关直流变换器设计与实现[J].电工技术学报,2018,33(7):1461-1471,11.基金项目
国家高科技研究发展计划(863计划)(2015AA050603)和国网总部科技项目(SGTJDK00DWJS1500098)资助. （863计划）
