Back to Search Start Over

A high-reliability SEPIC converter with reconfigurable voltage conversion gain

Authors :
Binxin Zhu
Jiaxin Liu
Yu Liu
Shubo Zhi
Yuhui Zhao
Source :
Energy Reports, Vol 9, Iss , Pp 523-531 (2023)
Publication Year :
2023
Publisher :
Elsevier, 2023.

Abstract

A high-reliability SEPIC converter with reconfigurable voltage conversion gain is proposed, which is composed of a basic SEPIC converter and n extended units. Adopting an interleaved parallel structure on the input side of the converter not only achieves leg-level hardware redundancy but also reduces the input current ripple. When one branch of the converter suddenly changes or fails, due to the redundancy between branches, the converter can still to work, and the duty cycle of the other branches can be readjusted by using PI control without changing output voltage and power of the converter. This feature undoubtedly presents the reliability of the converter. On the contrary, when the converter works in normal operation, it can also actively control operation mode of each branch to achieve reconfigurable voltage conversion gain function. In addition, since the duty cycles of the switches are not limited, voltage conversion gain of the converter is widely, which makes it more suitable for the occasions where the input side fluctuates greatly. Section 2 details the working principle of the proposed converter and the voltage and current stress on components. Then, the reconfigurable voltage conversion gain of the converter and its high reliability characteristics are analyzed in Section 3. Finally, the correctness of the theoretical analysis is verified by experiments.

Details

Language :
English
ISSN :
23524847
Volume :
9
Issue :
523-531
Database :
Directory of Open Access Journals
Journal :
Energy Reports
Publication Type :
Academic Journal
Accession number :
edsdoj.2f28b342357241eb9dae871a2043f5d9
Document Type :
article
Full Text :
https://doi.org/10.1016/j.egyr.2023.04.160