电源学报2018，Vol.16Issue(2)：124-130,7.DOI:10.13234/j.issn.2095-2805.2018.2.124
寄生电容对LLC谐振变换器的影响分析
Analysis of Impact of Stray Capacitance on LLC Resonant Converter
摘要
Abstract
It is easy to ignore the impact of stray capacitance on the converter during the design process of an LLC converter. In this paper, the impact of stray capacitance on the working principle of LLC converter is analyzed on the basis of the developing mechanism of stray capacitance. The existence of stray capacitance not only affects the soft-switch process of primary switch, but also distorts the output voltage gain under light or no load. Based on the optimization of dead time and compared with the existing solutions to the problem of gain distortion, a novel dual hysteresis adaptive Burst digital control scheme is proposed to improve the conversion efficiency under light load while stabilizing the converter output voltage. Finally, the correctness and feasibility of the proposed control scheme were verified by tests on an experimental prototype.关键词
寄生电容/LLC变换器/软开关/增益失真Key words
stray capacitance/LLC converter/soft-switch/gain distortion分类
信息技术与安全科学引用本文复制引用
俞珊,徐志望,董纪清..寄生电容对LLC谐振变换器的影响分析[J].电源学报,2018,16(2):124-130,7.基金项目
福建省教育厅科技基金资助项目(JA14356,JA15622) （JA14356,JA15622）
福建省自然科学基金资助项目(2014J01178)Project Supported by Science and Technology Foundation of Fu-jian Provincial Education Department(JA14356,JA15622) （2014J01178）
Na-tural Science Foundation of Fujian Province(2014J01178) （2014J01178）
