电源学报2025，Vol.23Issue(1)：21-31,11.DOI:10.13234/j.issn.2095-2805.2025.1.21
一种倍压型变占空比宽输出两相并联LLC谐振变换器
Voltage Doubling Variable Duty Cycle Wide Output Two-phase Parallel LLC Resonant Converter
摘要
Abstract
Aimed at the problems of a traditional LLC resonant converter in wide voltage applications such as a wide switching frequency range and a poor voltage regulation performance,a voltage doubling two-phase parallel resonant converter is proposed.There is a parallel double half-bridge LLC structure on the primary side of this converter,and a bidirectional switch is introduced into the full-bridge rectifier network on its secondary side to form a reconfigurable voltage doubling rectifier network.Fixed frequency control is adopted during operation.The lower half-bridge on the primary side changes the input voltage of the resonant tank by changing the duty cycle,while the upper half-bridge works with a fixed duty cycle.The rectifier network on the secondary side realizes full-bridge and voltage doubling hybrid rectification under the bidirectional switch,which can achieve 4 times of voltage gain.At the same time,this converter has a good soft switching performance,its voltage gain is independent of magnetizing inductance and load,and a larger magnetizing inductance can be selected to reduce the switch-off loss and conduction loss.Finally,the feasibility of the proposed converter was verified by simulation and experimental results.关键词
谐振变换器/定频控制/倍压整流/宽电压/软开关Key words
Resonant converter/fixed frequency control/voltage doubling rectification/wide voltage/soft switch分类
动力与电气工程引用本文复制引用
潘健,郭泓展,张恢鉴,邵冰..一种倍压型变占空比宽输出两相并联LLC谐振变换器[J].电源学报,2025,23(1):21-31,11.基金项目
太阳能高效利用及储能运行控制湖北省重点实验室开放基金资助项目(HBSEES201902)This work is supported by Open Fund of Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System under the grant HBSEES201902 （HBSEES201902）
