摘要
为了提高航天领域高压直流母线DC/DC变换器的效率性能和功率密度,基于氮化镓器件和谐振变换器拓扑,研究矩阵变压器和平面磁元件的优化方法,提出了一种包含等效半匝绕组的变压器绕组结构,实现了多个并联副边绕组间以及多个并联整流器件间的均流,降低了损耗,提高了低压大电流输出时的效率。此外,还研究了模块的并联均流方法,搭建了270 V转28 V、1.2 kW输出的模块单体样机和2.4 kW的多模块并联样机,验证了所提出方法的可行性。
In order to improve the efficiency and power density of the DC/DC converters of high-voltage DC buses in aerospace field,based on GaN high-electron-mobility transistor(HEMT) and resonant converter topology,the optimization method for matrix transformers and planar magnetic elements is studied. A transformer winding structure including equivalent half-turn windings is proposed,which realizes the symmetric element transformers in the matrix transformer and thus guarantees the current sharing among multiple paralleled secondary windings and multiple paralleled rectifiers. With this method,the secondary conduction losses are reduced,and the efficiency at low voltage and high current output is improved. Besides,the parallel current sharing method for modules is studied. A single module prototype of 270 V to 28 V with 1.2 kW output and a multi-module parallel prototype with 2.4 kW output are built up,which verify the feasibility of the proposed method.
作者
陈子健
秦伟
吴新科
CHEN Zijian;QIN Wei;WU Xinke(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China)
出处
《上海航天（中英文）》
CSCD
2020年第2期139-145,共7页
Aerospace Shanghai（Chinese&English）
基金
装备发展部资助项目(JZX2017 1643/Y537)。
关键词
半桥串并联三元件谐振拓扑
平面变压器
矩阵变压器
等效半匝
均流
half-bridge series-parallel three-element resonance topology(LLC)
planar transformer
matrix transformer
equivalent half-turn
current sharing
