机电工程技术2024，Vol.53Issue(7)：269-274,6.DOI:10.3969/j.issn.1009-9492.2024.07.057
基于LLC谐振变换器的四脉冲ZVS间歇控制方法
Four Pulse ZVS Intermittent Control Method Based on LLC Resonant Converter
摘要
Abstract
Because the LLC(resonant inductor Lr,excitation inductor Lm,resonant capacitor Cr,collectively referred to as LLC)resonant converter exhibits excellent characteristics in DC-DC conversion,yet in the intermittent control mode,a hard switching phenomenon still exists during the first turn-on of the switching tube in each control cycle.The potential for further enhancing the operational efficiency of the resonant converter under light load is limited.To address these issues,a novel four-pulse mode intermittent control strategy is put forward.Based on the three-pulse mode,a new pulse is designed on the secondary side for driving,with the aim of backflowing the energy of the secondary side to the primary side.Once the junction capacitor backflow is completed and the body diode is turned on,the trigger signal sent by the primary side switching tube can enable the primary side switching tube to be turned on in the first trigger pulse,allowing the converter to operate in the optimal efficiency trajectory.The experimental results demonstrate that the proposed control strategy can further enhance the light-load operational efficiency of the converter under the voltage reduction condition,thereby verifying the effectiveness of this strategy.关键词
LLC谐振变换器/轻载/寄生电容/间歇控制/能量回馈Key words
LLC resonant converter/light load/parasitic capacitance/burst control/energy feedback分类
信息技术与安全科学引用本文复制引用
马胜国,赵玉珂,古展基,曹才具,陈文,赵晓曦..基于LLC谐振变换器的四脉冲ZVS间歇控制方法[J].机电工程技术,2024,53(7):269-274,6.基金项目
深圳市国电科技通信有限公司科技项目基金资助(546808220007) （546808220007）
