变脉宽脉冲序列控制DCM Buck变换器

吴松荣; 钟曙; 许建平; 沙金

doi:10.3969/j.issn.0258-2724.2014.03.014

变脉宽脉冲序列控制DCM Buck变换器

doi: 10.3969/j.issn.0258-2724.2014.03.014

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（SWJTU11CX032）

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- 被引次数: 0
出版历程
- 收稿日期: 2013-05-13
- 刊出日期: 2014-06-25

Variable Width Pulse Train Controlled DCM Buck Converter

摘要

摘要: 为解决脉冲序列（pulse train，PT）控制开关DC-DC变换器稳态输出电压纹波较大的问题，通过研究较大输出电压纹波的产生机理，提出了一种变脉冲宽度脉冲序列（variable width pulse train，VWPT）控制方法.该方法基于电感电流断续导电模式（discontinuous conduction mode，DCM）Buck变换器，根据负载功率的变化，采用数字控制方式动态调节高、低功率脉冲占空比，得到两个能量差异较小的驱动脉冲，实现对变换器的控制，以获得明显优于PT控制的输出电压纹波特性.实验结果表明，相比于PT控制，VWPT控制可以有效降低变换器的稳态输出电压纹波50%左右.
- DC-DC变换器 /
- 脉冲序列控制 /
- 变脉宽 /
- 输出电压纹波
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.
- DC-DC converter /
- pulse train control /
- variable pulse width /
- output voltage ripple

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参考文献(15)

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文章访问数: 722
HTML全文浏览量: 42
PDF下载量: 557
被引次数: 0

变脉宽脉冲序列控制DCM Buck变换器

doi: 10.3969/j.issn.0258-2724.2014.03.014

计量

出版历程

Variable Width Pulse Train Controlled DCM Buck Converter

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出版历程

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