西南交通大学学报Issue(3)：455-461,7.DOI:10.3969/j.issn.0258-2724.2014.03.014
变脉宽脉冲序列控制DCM Buck变换器
Variable Width Pulse Train Controlled DCM Buck Converter
摘要
Abstract
In order to solve the problem that DC-DC converter switch has a large steady-state output voltage ripple in pulse train (PT)control,a variable width pulse train (VWPT)control method was proposed after analysis of the generating mechanism of large output voltage ripples. The VWPT control method is based on a buck converter operated in discontinuous conduction mode (DCM). According to the load power change,the duty ratios of high and low power pulses can be regulated dynamically by digital control,and then the converter can be controlled by two drive pulses with small energy discrepancy. Thus,the characteristics of output voltage ripple in VWPT control are obviously better than in PT control. The experimental results show that the steady-state output voltage ripple in VWPT control can be reduced about 50% compared with that in PT control.关键词
DC-DC变换器/脉冲序列控制/变脉宽/输出电压纹波Key words
DC-DC converter/pulse train control/variable pulse width/output voltage ripple分类
信息技术与安全科学引用本文复制引用
吴松荣,钟曙,许建平,沙金..变脉宽脉冲序列控制DCM Buck变换器[J].西南交通大学学报,2014,(3):455-461,7.基金项目
国家自然科学基金资助项目（51177140，51177138）；中央高校基本科研业务费专项资金资助项目 （）
