摘要
为解决DC/DC变换器应用中存在的回流功率过大、次级电流应力过高、导通损耗严重等问题,本文提出了一种双变压器式谐振变换器(DTRC)。首先,DTRC次级采用全桥和半桥双回路的拓扑结构,以全桥回路和半桥回路变压器次级电压相叠加的方式,实现了次级1.5倍的电压等级;其次,通过与最小电流轨迹(MCT)控制策略相结合对谐振电流有效值进行优化,实现谐振电流进一步减小,消除了DTRC次级的回流功率,减小了变换器导通损耗,提高了系统效率;最后,搭建了一台400 W的实验样机,通过仿真与实验验证了上述理论的正确性和可行性。
In order to solve the problems existing in the application of DC/DC converter,such as excessive return power,high secondary current stress and serious conduction loss,a dual transformer resonant converter(DTRC)is proposed in this paper.Firstly,DTRC secondary adopts full-bridge and half-bridge double-loop topology structure,and in the way of superposition of transformer secondary voltages of full-bridge and half-bridge loops,the voltage level is 1.5 times that of the secondary.Secondly,the effective value of resonant current is optimized by combining with the minimum current tra⁃jectory(MCT)control strategy,the resonant current is further reduced,the return power of DTRC secondary is elimi⁃nated,the conduction loss of converter is reduced,and the system efficiency is improved.Finally,a 400 W experimental prototype is built,and the correctness and feasibility of the above theory are verified by simulation and experiment.
作者
陈立澨
孙川
李翼男
胡松
Chen Lishi;Sun Chuan;Li Yinan;Hu Song(School of Electrical Engineering,Yancheng Institute of Technology,Yancheng 224051,China;School of Electrical and Automation Engineering,Changshu Institute of Technology,Suzhou 215000,China;School of Innovative Engineering,Macao University of Science and Technology,Macao 999078,China;Suzhou Smart Energy Technology Key Laboratory,Suzhou 215000,China)
出处
《电力电子技术》
2025年第6期122-127,共6页
Power Electronics
基金
国家自然科学基金(52461160257)
苏州市智慧能源技术重点实验室建设项目(SKLSET2303)。
关键词
谐振变换器
双变压器
最小电流轨迹
导通损耗
resonant converter
dual transformer
minimum current trajectory
conduction loss
