摘要
针对超级电容器能量回收系统采用硬开关电路存在损耗大的问题,研究了一种基于谐振的双向DC-DC软开关拓扑结构,该拓扑使用四个功率开关管实现功率双向流动,通过开关管的零电压(ZVS)导通,减小了开关损耗。分析了变换器在Buck和Boost模式下的工作模态,并推导了稳态工作时的基本方程。建立了20V/100V、240W双向DC-DC变换器的仿真模型,研制了实验样机,对变换器的工作模式进行了仿真和实验,仿真和实验结果表明变换器的效率可达到95%以上。
In view of the problem that super capacitor energy recovery system with hard switching circuit has high loss,this paper studies a bidirectional DC-DC soft switching topology based on resonance. The topology uses four power switches to achieve bidirectional power flow,then it reduces switching loss through the switch conduction with zero voltage（ ZVS）. The paper analyzes the working mode of converter under the mode of Buck and Boost mode,and deduces the basic equation of steady work. Then we established a simulation model of 20 V /100 V 240W bidirectional DC-DC converter and manufactured an experimental prototype. Afterwards the simulation and experiment are carried out on the converter operation mode,and the results of simulation and experimental show that the efficiency of the converter can reach more than 95%.
出处
《电工电能新技术》
CSCD
北大核心
2015年第5期18-23,共6页
Advanced Technology of Electrical Engineering and Energy
