电源学报2024，Vol.22Issue(4)：40-52,13.DOI:10.13234/j.issn.2095-2805.2024.4.40
具有混合控制策略的宽输出双全桥LLC谐振变换器
Wide Output Dual-full-bridge LLC Resonant Converter with Hybrid Control Strategy
摘要
Abstract
In the application of wide output voltage range,some problems exist in an LLC resonant converter under the traditional frequency control,such as a wide switching frequency regulation range,a large circulation current and difficulty in high-efficiency operation.To solve these problems,a dual-full-bridge LLC resonant converter under a fixed-frequency phase-shift and fixed-frequency PWM hybrid control strategy is proposed,which is suitable for the wide range of output voltage.This converter is composed of two full-bridge LLC resonant converters sharing one bridge arm,and the output voltage is modulated by the hybrid control,so that a quadruple voltage gain and a wider output voltage range of the resonant converter can be realized.Meanwhile,the problems that the large circulation current exists under the traditional frequency control and the soft switching cannot be realized at a small phase shift angle are solved,thus improving the system efficiency.The switching frequency of the converter is always equal to the resonance frequency,and the voltage gain is independent of load,which is helpful for the design of the magnetic element.At the same time,the soft switching can be realized in the full load range.Finally,a detailed analysis of the circuit principle was given,which was further verified by simulations.An experimental platform was also established to validate the feasibility and effectiveness of the proposed converter.关键词
双全桥LLC谐振变换器/定频移相-定频PWM混合控制/宽输出范围/零电压开关/零电流关断Key words
Dual-full-bridge LLC resonant converter/fixed-frequency phase-shift and fixed-frequency PWM hybrid control/wide output range/zero voltage switch/zero current switching分类
信息技术与安全科学引用本文复制引用
潘健,石迪,刘松林,熊嘉鑫,宋豪杰..具有混合控制策略的宽输出双全桥LLC谐振变换器[J].电源学报,2024,22(4):40-52,13.基金项目
太阳能高效利用及储能运行控制湖北省重点实验室开放基金资助项目(HBSEES201902)This work is supported by Open Fund of Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System under the grant HBSEES201902 （HBSEES201902）
