桂林理工大学学报2025，Vol.45Issue(2)：260-265,6.DOI:10.3969/j.issn.1674-9057.2025.02.015
基于氮化镓器件的LLC谐振变换器效率优化
Efficiency optimization of LLC resonant converter based on GaN devices
摘要
Abstract
The key to enhancing LLC resonant converter efficiency lies in minimizing switching losses of the power switches.According to the requirements of high power density and high efficiency of 240 W adapter,GaN power device is used as the primary switch,and the resonance parameters K and Q are constrained and opti-mized by the control variable method.Through the Mathcad theoretical calculation,Matlab simulation and ex-perimental platform test,the selected synchronous rectifier driver chip is MP6924A.Finally,a 240 W adapter prototype is developed.The power density of the whole machine reaches 0.82 W/cm3,and the high voltage and full load efficiency of the whole machine is 96％.The experimental result verifies the feasibility of adopting GaN power devices,optimizing resonance parameters,and synchronous rectification technology to improve efficiency.关键词
LLC谐振变换器/高效率/氮化镓/同步整流Key words
LLC resonant converter/high efficiency/gallium nitride/synchronous rectification分类
信息技术与安全科学引用本文复制引用
于雁南,付学良,李明通,李大汉..基于氮化镓器件的LLC谐振变换器效率优化[J].桂林理工大学学报,2025,45(2):260-265,6.基金项目
广西自然科学基金项目(2020GXNSFBA297124 （）
2021GXNSFAA220038) （）
桂林市技术应用与推广计划项目(20210226-2) （20210226-2）
桂林市创新平台和人才计划项目(20220124-2) （20220124-2）
