Zero-voltage Soft-switching Conditions and Loss Balance Method of Three Level ANPC-DAB

被引：0
|
作者：
Guan Q. [1 ]
Zhang Y. [1 ]
Zhao H. [1 ]
Kang Y. [1 ]
机构：
[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Active neutral point clamped three level circuit; Dual active bridge DC/DC converter; Loss distribution balancing; Soft switching; Zero voltage turn-on;
D O I：
10.13334/j.0258-8013.pcsee.201657
中图分类号：
学科分类号：
摘要：
The dual active bridge (DAB) DC-DC converter with multi-level circuits can achieve higher voltage level, higher power density and better performance. This paper proposed a DAB based on active neutral point clamped (ANPC) three-level circuit (ANPC-DAB). Through the analysis of the soft-switching characteristics of the ANPC circuit in the switching process among switch states, the conditions for enabling all 12 switching tubes to achieve zero voltage switching (ZVS) turn-on were obtained. On this basis, the influence of the zero-level switching states on loss distribution was also analyzed, and a modulation method that can effectively balance the loss distribution was proposed. Furthermore, this paper established the math model of loss for ANPC-DAB, and the loss distribution of power devices and efficiency were analyzed. Finally, the experimental verification was completed on a 1.5kW experimental prototype. The simulation and experimental results showed that the proposed modulation method effectively improved the loss distribution of power devices while all the switching tubes realized soft switching. © 2021 Chin. Soc. for Elec. Eng.
引用
收藏
页码：4603 / 4615
页数：12
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