电测与仪表2024，Vol.61Issue(1)：71-76,6.DOI:10.19753/j.issn1001-1390.2024.01.011
大功率LLC变换器的谐振参数优化设计
Optimization design of resonant parameters of high power LLC
摘要
Abstract
LLC converter has the soft switching characteristics of zero voltage switching of primary side and zero current switching of secondary side.It has high power density,which is widely used in vehicle power supply,LED and other fields.However,due to the complexity of LLC resonant converter,there is a lack of an effective and clear design method for resonant parameters.Based on the first harmonic approximation(FHA),the traditional gain formula is further simpli-fied,and a simple and clear resonant parameter design method is proposed in this paper.In order to verify the optimal pa-rameters of this method,a 7.5 kW experimental prototype is made.The output voltage range is 100 V-375 V,and the constant power output of 7.5 kW can be achieved in the voltage range of 200 V-375 V.the average efficiency of the whole machine can reach more than 95％,and the peak efficiency can reach 96.7％.The experimental results show that the proposed parameter design method can maximize the efficiency of the converter.关键词
LLC谐振变换器/充电模块/谐振参数设计/高效率Key words
LLC resonant converter/charging module/resonance parameter design/high efficiency分类
信息技术与安全科学引用本文复制引用
李练兵,张金龙,谢朋朋,何桂欣,梁纪峰,王阳..大功率LLC变换器的谐振参数优化设计[J].电测与仪表,2024,61(1):71-76,6.基金项目
河北省重点研发计划项目(20312102D) （20312102D）
