Parameters Optimization of an Intermediate Frequency Isolated SiC Power DC-DC Converter

被引：1
|
作者：
Kang, Chengwei [1 ,2 ]
Pan, Hongliang [1 ]
He, Shuiyuan [3 ]
Ren, Jiahui [3 ]
Cong, Peicheng [4 ]
Hou, Dazhi [2 ]
Zhang, Jingyan [2 ]
Diao, Lijun [3 ]
机构：
[1] Tongji Univ, Natl Maglev Transportat Engn Technol Res & Dev Ct, Shanghai 201804, Peoples R China
[2] CRRC Changchun Railway Vehicles Co Ltd, Changchun 130022, Peoples R China
[3] Beijing Jiaotong Univ, Sch Elect Engn, Beijing 100044, Peoples R China
[4] Shanghai CRC Rail Transportat Equipment Co Ltd, Shanghai 200245, Peoples R China
来源：
IEEE ACCESS | 2022年 / 10卷
关键词：
Silicon carbide; Frequency conversion; Resonant frequency; Resonant converters; Voltage; Inductors; DC-DC power converters; Auxiliary converter; intermediate frequency isolation; SiC; LLC resonant converter;
D O I：
10.1109/ACCESS.2022.3204693
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
To improve the lightweight level of auxiliary converters for urban rail vehicles, full SiC intermediate frequency auxiliary converters have become a trend. Aiming at its core component, a full SiC intermediate frequency isolated DC-DC converter using Boost + LLC topology is studied in this paper. The working principle and characteristics of the converter are analyzed in detail. Based on the operating characteristics of the LLC resonant converter and the realization mechanism of soft switching, an optimization design method of the resonant parameters is proposed, which can make LLC resonant converters exhibit the characteristics of DC transformers and realize soft switching in the full load range. Considering the power losses of the converter and the voltage stress of SiC MOSFET, the intermediate bus voltage design method is given. Finally, the correctness of the parameter design method is verified by simulation and experiment, and the performance of the full SiC intermediate frequency isolated DC-DC converter is analyzed. When the input voltage is 1500V and the output power is 15kW, the efficiency of the converter reaches 96.21%. Compared with the Si intermediate frequency isolated DC-DC converter, the power density is improved by 80.62%.
引用
收藏
页码：94808 / 94817
页数：10
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