电源学报2016，Vol.14Issue(5)：157-165,9.DOI:10.13234/j.issn.2095-2805.2016.5.157
一种带纹波抑制的交错并联Buck/Boost变换器轻载效率研究
A Ripple Suppression with Staggered Parallel Buck/Boost Converter Light Load Efficiency Research
摘要
Abstract
The non-isolated interleaving bi-directional Buck-Boost converter is faced with a widespread problem of low underloading efficiency. The Boost model of the multi-phase interleaving Buck/Boost converter is adopted as the research object in this paper, and a comprehensive analysis of power loss is conducted under the DCM and CCM model. According to the principle that efficiency can be increased through reduced frequency during underloading operation of the transformer, and the principle of optimized frequency modulation is put forward to adjust the switching frequency under different loads so as to realize the goal of increasing efficiency. Concerning the defect of worsening ripples caused by reduced frequency, the magnetic integration technique is applied to the interleaving bi-directional Buck/Boost converter to efficiently improve the channel’s inductive current ripples and the output voltage ripples. Besides, the filter capacitor optimized design principle after magnetic integration is given at an attempt to minimize loss and increase underloading efficiency. At last, the accuracy of the theoretical analysis is proved by simulation and experiments, thus providing new theoretical bases for underloading efficiency optimization of the interleaving bi-directional Buck/Boost converter and promoting realization of the full-load high-efficiency bi-directional Buck/Boost converter design.关键词
双向Buck/Boost变换器/轻载效率优化/纹波抑制/DCM/磁集成Key words
bidirectional Buck/Boost converter/light load/ripple suppression/DCM/magnetic integration分类
信息技术与安全科学引用本文复制引用
刘悦新,王磊..一种带纹波抑制的交错并联Buck/Boost变换器轻载效率研究[J].电源学报,2016,14(5):157-165,9.基金项目
国家自然科学基金资助项目（50607007） Project Supported by the National Natural Science Foundation of China （）
