摘要
从半桥LLC型变换器拓扑结构与工作原理分析入手,并采用基波分析法(FHA)对变换器进行建模,得到变换器的直流增益、输入阻抗和关键点电流公式,为后续的谐振参数优化提供了数学依据。考虑到LLC参数的选择对变换器的效率有很大影响,采用混沌-布谷鸟搜索算法对励磁电感和谐振电感的取值进行优化,优化算法的目标函数由关键点电流来构建,得到谐振参数对变换器效率的优选值。然后,通过损耗分析结合热仿真的方法来分析高功率密度型变换器的发热情况及参数优化的合理性。最后,通过实验对相关结果进行了验证。
Start with the analysis of the topology and working principle of the half-bridge LLC converter,and uses the fundamental harmonic analysis(FHA)to model the converter.The direct current gain,input impedance,and key point current formulas of the converter are obtained to optimize the subsequent resonance parameters provides mathematical basis.Considering that the choice of LLC parameters has a great impact on the efficiency of the converter,the chaoscuckoo search algorithm is used to optimize the values of the excitation inductance and resonance inductance.The objective function of the optimization algorithm is constructed by the key point current to obtain resonance optimal value of parameter to converter efficiency.Then,the heat analysis of the high power density converter and the rationality of the parameter optimization are analyzed by the method of loss analysis combined with thermal simulation.Finally,the relevant results are verified through experiments.
作者
顾胜坚
王春吉
帅禄玮
江友华
GU Sheng-jian;WANG Chun-ji;SHUAI Lu-wei;JIANG You-hua(Shanghai University of Electric Power,Shanghai 201306,China)
出处
《电力电子技术》
CSCD
北大核心
2020年第7期76-80,共5页
Power Electronics
关键词
变换器
基波分析法
参数优化
混沌-布谷鸟搜索算法
converter
fundamental harmonic analysis
parameter optimization
chaos-cuckoo search algorithm
