华中科技大学学报（自然科学版）2024，Vol.52Issue(3)：1-6,6.DOI:10.13245/j.hust.249558
基于磁集成设计的超高频谐振反激变换器研究
Research on very high frequency resonant flyback converter based on integrated magnetic design
摘要
Abstract
A VHF resonant flyback power converter based on integrated magnetic design was studied.By taking advantages of parasitic parameters in the circuit,total passive components count was reduced which further improves the power density.Firstly,a loosely coupled transformer was constructed with air-core PCB inductors.The leakage inductance of the transformer was used as the resonant inductor and the parasitic capacitance of the power switch was used as the resonant capacitor.By properly designing transformer electrical parameters,zero-voltage-switching(ZVS)of the power switch was achieved.Then,the initial transformer geometric structure was calculated with improved Wheeler formula.Furthermore,the transformer geometric structure was adjusted based on finite element simulations,so that to achieve the desired electrical parameters.Finally,a 30 MHz,25 W prototype was built.At rated power,the prototype achieves 80.5％efficiency and 5.5 W/cm3 power density,which verifies above method.关键词
谐振反激变换器/超高频/空心变压器/寄生参数/有限元仿真Key words
flyback converter/very high frequency/air core transformer/parasitic parameters/finite element simulation分类
信息技术与安全科学引用本文复制引用
张德生,张明,宋伟,闵闰..基于磁集成设计的超高频谐振反激变换器研究[J].华中科技大学学报（自然科学版）,2024,52(3):1-6,6.基金项目
国家自然科学基金资助项目(62074067) （62074067）
工信部项目资金资助项目. （）
