一种LLC变换器反向运行升压控制策略  

A Step-up Control Strategy in Reverse Mode of LLC Converter

作　　者：施荣辉 朱学忠[1] 刘浩宇 SHI Rong-hui;ZHU Xue-zhong;LIU Hao-yu(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学自动化学院,江苏南京211106

出　　处：《电力电子技术》2025年第2期99-102,共4页Power Electronics

摘　　要：针对双向LLC谐振变换器在反向工作时无法升压的问题,提出了一种新型的定频变占空比控制策略,该策略通过对整流侧开关管的占空比进行调整,改变谐振腔充能时间从而实现反向可控升压,且能实现所有开关管的零电压开通。对所提控制策略工作原理进行了详细分析,并对软开关边界条件进行了计算。最后基于Matlab/Simulink软件和硬件实验平台,对所提方法的可行性和有效性进行了验证。A new fixed-frequency and variable duty cycle control strategy is proposed to solve the problem that the bidirectional LLC resonant converter can not be boosted when working in the reverse mode.The strategy controls the rectifier switches by changing the duty cycle,so that the resonator is charged to obtain step-up operation,and all switching devices can be turned on with zero-voltage.The working principle of the proposed control strategy is ana-lyzed in detail,and the soft-switching boundary conditions are calculated.Finally,based on Matlab/Simulink software and hardware experimental platform,the feasibility and effectiveness of the proposed method are verified.

关 键 词：谐振变换器 升压控制 定频变占空比控制 

分 类 号：TM46[电气工程—电器]