具有降压单元的磁集成组合Buck变换器的研究  

Research on Magnetic Integrated Combined Buck Converter with Buck Unit

作　　者：荣德生[1] 刘亚迪 孙瑄瑨 吕培贤 任杰 RONG Desheng;LIU Yadi;SUN Xuanjin;LÜ Peixian;REN Jie(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105

出　　处：《电源学报》2022年第1期36-45,共10页Journal of Power Supply

基　　金：辽宁省自然科学基金资助项目(201602359)。

摘　　要：通过对Buck变换器和Buck-Boost变换器中的储能元器件进行分析,从中构造出2种开关电感降压单元,分析了降压单元的工作原理,探讨了降压开关电感结构与升压开关电容结构之间的对偶关系。从二次型Buck变换器中提取前级降压单元,将其与2种降压开关电感单元进行组合,从而提出了一种具有降压单元的新型组合Buck变换器。通过分析变换器CCM和DCM的工作模态、工作波形以及各项参数,将变换器中的磁性元件进行磁集成,从而减小了电感电流纹波。最后,通过实验的方式验证了理论的正确性。In this paper,two kinds of switched inductor Buck units are constructed by analyzing the energy storage components in a Buck converter and a Buck-Boost converter.The working principle for Buck units is analyzed,and the dual relationship between the structure of the Buck switched inductor and that of the Boost switched capacitor is discussed.The pre-stage Buck unit is extracted from a quadratic Buck converter and further combined with the two Buck switched inductor units,thus proposing a novel combined Buck converter with a Buck unit.By analyzing the working mode,working waveforms and various parameters of this converter in continuous conduction mode(CCM)and discontin-uous conduction mode(DCM),its magnetic components are magnetic integrated to reduce the inductor current ripple.Finally,the theoretical analysis was experimentally verified.

关 键 词：开关电感 降压单元 开关电容 对偶关系 磁集成 

分 类 号：TM46[电气工程—电器]