摘要
为提高三管推挽双向全桥变换器运行效率,提出了一种峰值电流应力优化控制策略。首先,分析了TPBFC变换器扩展移相控制(Extended Phase-shift Control,EPS)下的基本运行模态,推导了系统传输功率与峰值电流应力表达式。进一步,采用拉格朗日函数构建了变换器传输功率与峰值电流应力的约束模型,推导了各运行模态下满足峰值电流应力最小的移相比组合。在搭建的500 W样机上的实验表明,采用所提出的方法使变换器峰值效率提升了2%。
To improve the operation efficiency of three-switch push-pull bidirectional full bridge converter(TPBFC),this paper proposes a peak current stress optimization control strategy.First the basic operation mode of TPBFC converter under extended phase shift control(EPS)is analyzed,and the expressions of system transmission power and peak current stress are derived.Furthermore the constraint model of transmission power and peak current stress of the converter is constructed by using Lagrange function,and the phase shift ratio combinations enabling the minimum peak current stress under all the operation modes are derived.The adoption of the proposed strategy is found in an experiment on a self-built 500 W prototype to achieve a peak efficiency increase by 2%for the converter.
作者
陈琦
伍群芳
孙志峰
王玉珮
CHEN Qi;WU Qunfang;SUN Zhifeng;WANG Yupei(China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.,Nanjing 211100,China;Jiangsu Key Laboratory of New Energy Generation and Power Conversion,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《电工技术》
2024年第11期69-72,76,共5页
Electric Engineering
基金
江苏省自然科学青年基金(编号BK20210305)。
