电工技术学报2018，Vol.33Issue(12)：2777-2787,11.DOI:10.19595/j.cnki.1000-6753.tces.170469
基于移相补偿的全桥LLC谐振变换器交错并联技术
An Interleaved Full-Bridge LLC Resonant Converter with Phase Shift Compensation
摘要
Abstract
LLC resonant converter with the advantages of high frequency, high efficiency and high power density, has been widely used in recent years. However, due to the characteristics of the circuit, the output current ripple is larger, requiring multiple output filter capacitors in parallel, which limits the volume and application of the system. In order to solve this problem, interleaving parallel technology can be used, but the parameter deviations of resonant circuits make the current balance hard for LLC resonant converter. Therefore, a current-sharing control strategy is proposed applying the interleaved full-bridge LLC resonant converter. In this method, the output voltage is controlled by the pulse frequency modulation (PFM), the current unbalance caused by the parameters deviation is compensated by the phase shift modulation (PSM), and the interleaved angle between two LLC resonant converters is dynamically adjusted according to the phase shift angle to further reduce the output current ripple. On the basis of theoretical analysis, an experimental prototype was designed and built, and the results verified the proposed method.关键词
LLC谐振变换器/交错并联/均流/移相调制/交错角控制Key words
LLC resonant converter/interleaving/current balance/phase-shifting modulation/interleaved angle control分类
信息技术与安全科学引用本文复制引用
赵清林,刘会峰,袁精,崔高峰..基于移相补偿的全桥LLC谐振变换器交错并联技术[J].电工技术学报,2018,33(12):2777-2787,11.基金项目
国家自然科学基金(51407154)和河北省自然科学基金(E2016203237)资助项目. （51407154）
