负载和输入电压自适应零电压软开关全桥变换器  

A Load and Input Voltage Adaptive Zero-Voltage-Switching Full-Bridge Converter

作　　者：杨晓光[1,2] 王德鑫 贾哲 高正 Yang Xiaoguang;Wang Dexin;Jia Zhe;Gao Zheng(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin,300130,China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin,300130,China;Shanghai Institute of Space Power-Sources,Shanghai,200245,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津300130 [2]河北工业大学河北省电磁场与电器可靠性重点实验室,天津300130 [3]上海空间电源研究所,上海200245

出　　处：《电工技术学报》2022年第12期3061-3072,共12页Transactions of China Electrotechnical Society

摘　　要：该文提出一种在宽输入电压和宽负载范围内工作于零电压软开关(ZVS)的全桥DC-DC变换器。该变换器是在传统移相全桥变换器拓扑的基础上增加了一个简单的LC辅助电路,并通过窄频率调节方式控制辅助电流,在满足ZVS条件下能够最小化环流损耗。采用窄频率变化能够对辅助电流进行有效的调节而不会对主电路的设计和控制带来明显的影响。对变换器的稳态性能进行详细分析;建立变换器的数学模型,可直接用于变换器的优化设计和精确控制。实验结果与理论分析具有很好的一致性。This paper presents a zero-voltage-switching(ZVS)full-bridge DC-DC converter operating in a wide input voltage and load range.The proposed converter is derived from the addition of a simple LC auxiliary circuit to the traditional phase-shifted full-bridge(PSFB)converter.The auxiliary current is controlled through a narrow frequency change,and the circulating current loss can be minimized under the ZVS operating conditions.The use of a narrow frequency change can effectively adjust the auxiliary current without significantly affecting the design and control of the main circuit.The steady-state performance of the converter is analyzed in detail;the mathematical model of the converter is established,which can be directly used for the optimized design and precise control of the converter.The experimental results are in good agreement with the analysis results.

关 键 词：环流损耗 全桥变换器 负载自适应 输入电压自适应 谐振电路 零电压软开关(ZVS) 

分 类 号：TM46[电气工程—电器]