双有源桥变换器的最小电流应力变频控制  

Minimum Current Stress Control with Varying Switching Frequency for Dual-active-bridge Converter

作　　者：贺伟 刘晓芳 HE Wei;LIU Xiaofang(School of Electrical and Control Engineering,Henan University of Urban Construction,Pingdingshan 467044,China)

机构地区：[1]河南城建学院电气与控制工程学院,平顶山467044

出　　处：《电源学报》2024年第5期92-99,共8页Journal of Power Supply

基　　金：国家自然科学基金资助项目(61803145);河南省本科高校青年骨干教师培养计划资助项目(2023GGJS141);河南省科技攻关资助项目(232102210163)。

摘　　要：为了提高双有源桥DAB(dual-active-bridge)变换器的效率,提出1种变开关频率控制下的最小电流应力控制策略。首先,分析电压在宽范围变化时的最小电流应力优化控制方法,建立变换器在轻载条件下的导通损耗和开关损耗表达式,并对不同开关频率下的导通损耗和开关损耗进行比较;其次,详细介绍闭环控制的实现方法及各模式下的功率传输范围,轻载条件下所提方法可显著降低电流应力,从而提高DAB变换器的效率;最后,通过仿真和实验验证了所提控制方法的优越性。To improve the efficiency of a dual-active-bridge(DAB)converter,a control strategy of minimum current stress with varying switching frequency control is proposed.First,the minimum-current-stress-optimized control method when the voltage changes in a wide range is analyzed,the expressions for the conduction loss and switching loss of the DAB converter under light load conditions are established,and the conduction loss and switching loss at different switching frequencies are further compared.Then,the implementation method for closed-loop control and the power transmission range in each mode are introduced in detail.Under light load conditions,the proposed method can significantly reduce the current stress while improving the efficiency of the DAB converter.Finally,simulation and experimental results verified the advantage of the proposed control method.

关 键 词：双有源桥变换器 DC/DC变换器 最小电流应力 变频控制 效率优化 

分 类 号：TM461[电气工程—电器]