Design of high-performance bidirectional DC/DC converter applied for more electric aircraft

The Journal of Engineering

Bo Liu¹  Maohang Qiu² 

[1] College of Electrical Engineering , Zhejiang University , Hangzhou 310029 , People's Republic of China

关键词: symmetrical CLLC resonant converter;    DAB;    power density;    MEA;    power 3.0 kW;    power loss;    symmetrical CLLC resonant topology;    ZVS region;    more electric–electric aircraft;    high-performance bidirectional DC/DC converter;   

DOI  :  10.1049/joe.2018.0044

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Bidirectional DC/DC converter is an important part of the more electric aircraft (MEA). A high-performance bidirectional DC/DC converter with high efficiency and power density reduces the both volume and power loss of the converter. There are mainly two kinds of basic topologies applied to bidirectional DC/DC converter. One is a dual active bridge (DAB) and the other is symmetrical CLLC resonant topology. Both topologies can realise zero-voltage switch (ZVS). The DAB has been widely researched and applied to many fields including the MEA as DAB is easy to design and control. However the ZVS region of the DAB is limited. What is worse, the DAB always switches when the current is at the peak. Symmetrical CLLC resonant topology has also been widely researched in recent years. Compared with the DAB, the symmetrical CLLC resonant converter can reach ZVS in a wider region. In this study both the topologies are discussed and the design of the better one is demonstrated. A 3 kW symmetrical CLLC resonant converter is designed to verify the conclusion.

【 授权许可】

CC BY