一种双Buck-Boost型直流变换器的研究  

Research on a Dual Buck-Boost DC/DC Converter

作　　者：赵科技 张加胜[1] 郑长明[1] 张国程 ZHAO Ke-ji;ZHANG Jia-sheng;ZHENG Chang-ming;ZHANG Guo-cheng(College of Information and Control Engineering,China University of Petroleum,QingdaoShandong 266580,China)

机构地区：[1]中国石油大学(华东)信息与控制工程学院,山东青岛266580

出　　处：《计算机仿真》2020年第5期201-205,286,共6页Computer Simulation

基　　金：国家自然科学基金资助项目(51777216)。

摘　　要：提出了一种双Buck-Boost型(DBB)直流变换器,与传统Boost直流变换器相比,该DBB变换器具有较宽的输出电压范围,并且降低了功率器件的电流应力和直流链电容的电压。当输入、输出条件保持一致时,由于其输出电压纹波频率是开关频率的2倍,可以减小输出电容。详细分析了DBB变换器的拓扑结构、工作原理,建立该变换器的数学模型,推导出其稳态电压增益、连续导通模式下的电感临界值。同时,对开关管和二极管的电压应力及电流应力进行了详细分析。最后,通过MATLAB/Simulink仿真验证了理论分析的正确性。This paper proposes a dual Buck-Boost(DBB) DC/DC converter. Compared to the conventional Boost DC/DC converter, DBB converter has a wide range of output voltage,and effectively reduces current stresses for switches and diodes, as well as the voltage stress for DC link capacitor. The output capacitor can be reduced when the input and output conditions are the same, because the equivalent frequency of output voltage ripple is the double of the switching frequency. The paper analysed its topology, operating principle, steady-state voltage gain, and the minimum inductor of the converter operating in continuous conduction mode(CCM). Meanwhile, the issue regarding voltage and current stress analysis was discussed in this paper either. Finally, the proposed converter was verified through MATLAB/Simulink simulation.

关 键 词：升降压 直流变换器 电流应力 交错控制 输出电压纹波 

分 类 号：TM743[电气工程—电力系统及自动化]