电子器件Issue(1)：81-85,5.DOI:10.3969/j.issn.1005-9490.2016.01.017
基于电流纹波率反激式变压器导通模式的分析
Analysis on Conduction Mode of Flyback Transformer Based on Current Ripple Ratio
摘要
Abstract
A method to design a flyback transformer and distinguish its conduction modes is proposed based on the current ripple ratio. An equation for the flyback transformer going into the discontinuous conduction mode from the initial continuous conduction mode is derived by using this method. According to the equation,the calculation is performed by MATLAB,and the effects of the input voltage,load current or reflected secondary voltage on the con⁃duction mode of the flyback transformer are analyzed. The calculation indicates the greater the minimum current rip⁃ple ratio or reflection voltage is,the more easily the flyback transformer goes into the discontinuous conduction mode when the input voltage increases or load current decreases. Then,a 24 V 1.5 A flyback switching power sup⁃ply is designed,and the current waveforms of the flyback transformer are measured. The experiment shows that the measured results are agreement with the derived equation,and the current ripple ratio is more intuitive and easier to be measured than the current wave factor.关键词
反激式变压器/电流纹波率/导通模式/分析Key words
flyback transformer/current ripple ratio/conduction mode/analysis分类
信息技术与安全科学引用本文复制引用
周有平,陈国杰,李斌..基于电流纹波率反激式变压器导通模式的分析[J].电子器件,2016,(1):81-85,5.基金项目
国家自然科学基金 （）
