Open AccessDual‐active‐bridge DC–DC converter with auxiliary parallel networks for wide load range ZVZCS application
Author(s) -
Tang Yuanhong,
Hu Weihao,
Chen Zhangyong,
Huang Qi,
Blaabjerg Frede
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2019.0766
Subject(s) - dual (grammatical number) , voltage , computer science , range (aeronautics) , control theory (sociology) , current (fluid) , converters , topology (electrical circuits) , electronic engineering , electrical engineering , materials science , engineering , art , literature , control (management) , artificial intelligence , composite material
In this study, a wide load range zero‐voltage zero‐current switching (ZVZCS) dual‐active‐bridge DC–DC converter using auxiliary parallel networks is proposed. The outstanding feature of the proposed converter is that all of the switches are allowed to operate with zero‐voltage switching while four of the switches are allowed to operate with zero‐current switching, due to the use of two auxiliary parallel networks, which were paralleled to two active bridges, respectively. Furthermore, the circulating current losses can be reduced significantly by using unified boundary trapezoidal modulation method. Based on these merits, the proposed converter has some advantages for the wide range load variation applications with less circulating current losses. The operation principles, soft‐switching conditions and loss analyses comparison are given in this study. These benefits and characteristics mentioned above are verified from the experimental results by using a 1 kW prototype.