电源学报2025，Vol.23Issue(2)：1-10,10.DOI:10.13234/j.issn.2095-2805.2025.2.1
可拓展的宽输出变模态交错并联LLC变换器
Expandable Wide-output Variable-mode Interleaved Parallel LLC Converter
摘要
Abstract
Limited by the switching frequency,the frequency-controlled LLC resonant converter is difficult to achieve a wide output voltage range.To solve this problem,an expandable variable-mode interleaved parallel LLC resonant converter is studied.The secondary-side of this converter adopts a voltage doubling rectifier circuit,which can work in a parallel or series mode according to different switch combinations of two half-bridges on the primary-side,and it can adapt to the wide output voltage range of 1-3N times.A fixed-frequency PWM control method is proposed.In the middle region between the parallel and series modes,the fixed switching frequency is taken as the resonant frequency,and the duty cycle of one bridge arm is changed to realize voltage control.PSIM simulation results show that the wide output voltage range of 1-3N times can be realized by expanding 2N resonator cavities.The experimental results of a 100 W prototype demonstrate that the wide output voltage range of 1-3 times can be achieved with two half-bridges and two resonant cavities,and the effectiveness of the proposed converter and its control strategy was verified.关键词
谐振变换器/宽电压输出/定频PWM控制Key words
Resonant converter/wide output voltage/fixed-frequency PWM control分类
信息技术与安全科学引用本文复制引用
张杰,杨淋,邹晨,肖辞,刘林..可拓展的宽输出变模态交错并联LLC变换器[J].电源学报,2025,23(2):1-10,10.基金项目
2020年湖北省重点研发计划资助项目(2020BBB084)This work is supported by Key Research and Development Program in Hubei Province in 2020 under the grant 2020BBB084 （2020BBB084）
