Design and thermal management optimization of a 100w high-frequency LLC resonant converter based on gallium nitride devices
基于氮化镓器件的100W高频LLC谐振变换器设计与热管理优化

摘要

氮化镓（GaN）器件以其高频、高效率和小体积的特点，成为高功率变换器中的理想选择。本文设计了一种基于氮化镓器件的100W高频LLC谐振变换器，并对其热管理进行了优化。分析了GaN器件在高频应用中的优势，介绍了LLC谐振变换器的基本工作原理和设计要求。接着，通过仿真与实验验证了变换器在100W功率下的高效能和稳定性。针对热管理问题，提出了一种结合散热设计与主动冷却的综合优化方案。结果表明，优化后的系统在热稳定性和转换效率方面都得到了显著提高，达到了较好的工作效果。

Abstract

Gallium Nitride (GaN) devices, characterized by high frequency, high efficiency, and small size, have become an ideal choice in high-power converters. This paper designs a 100W high-frequency LLC resonant converter based on GaN devices and optimizes its thermal management. It analyzes the advantages of GaN devices in high-frequency applications, and introduces the basic working principles and design requirements of the LLC resonant converter. Subsequently, simulations and experiments verify the high efficiency and stability of the converter under 100W power. For thermal management issues, a comprehensive optimization scheme combining heat dissipation design and active cooling is proposed. The results show that the optimized system has significantly improved thermal stability and conversion efficiency, achieving good working performance.