LLC半桥谐振变换器参数设计法的比较与优化

摘要

LLC half-bridge resonant converter has been widely studied due to advantages of high efficiency and high power density.The accurate parameters can create a precondition for LLC resonant converter to achieve high efficiency and satis-factory soft switching.A parameter design strategy based on frequency domain is described,a more accurate design strategy is introduced based on frequency and time domains in order to optimize the parameter.A I,LC resonant converter prototype which employ the latter strategy is designed and the results verify the feasibility of the strategy.%LLC半桥谐振变换器以其高效率、高功率密度等优点成为研究的热门拓扑.合理选择其参数的是实现变换器高工作效率.优良软开关特性的前提和保证.介绍了一种皋丁频域分析的参数设计方法,在总结其优缺点的基础上给出一种更为精确的频域、时域相结合的方法.通过优化参数设计,并根据该设计策略制作了一台LLC半桥谐振变换器样机,以验证所述方法的可行性.