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双缘COT调制数字电压型控制Buck变换器分析

周国华,  陈兴,  崔恒丰

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文章导航 > 西南交通大学学报  > 2015 >  28(1): 13-19,35.
周国华, 陈兴, 崔恒丰. 双缘COT调制数字电压型控制Buck变换器分析[J]. 西南交通大学学报, 2015, 28(1): 13-19,35. doi: 10.3969/j.issn.0258-2724.2015.01.003
引用本文: 周国华, 陈兴, 崔恒丰. 双缘COT调制数字电压型控制Buck变换器分析[J]. 西南交通大学学报, 2015, 28(1): 13-19,35. doi: 10.3969/j.issn.0258-2724.2015.01.003
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ZHOU Guohua, CHEN Xing, CUI Hengfeng. Analysis of Digital Voltage-Mode Controlled Buck Converter with Dual-Edge Constant on-Time Modulation[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 13-19,35. doi: 10.3969/j.issn.0258-2724.2015.01.003
Citation: ZHOU Guohua, CHEN Xing, CUI Hengfeng. Analysis of Digital Voltage-Mode Controlled Buck Converter with Dual-Edge Constant on-Time Modulation[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 13-19,35. doi: 10.3969/j.issn.0258-2724.2015.01.003
shu

双缘COT调制数字电压型控制Buck变换器分析

doi: 10.3969/j.issn.0258-2724.2015.01.003
基金项目: 

国家自然科学基金资助项目(61371033)

高等学校博士学科点专项科研基金资助项目(20130184120011)

霍英东教育基金会高等院校青年教师基金资助项目(142027)

四川省青年科技基金资助项目(2014JQ0015,2013JQ0033)

中央高校基本科研业务费专项资金资助项目(SWJTU11CX029)

详细信息
    作者简介:

    周国华(1983-), 男, 副教授, 硕士生导师, 研究方向为开关变换器调制与控制技术、数字控制技术、动力学建模与分析, E-mail:ghzhou-swjtu@163.com

Analysis of Digital Voltage-Mode Controlled Buck Converter with Dual-Edge Constant on-Time Modulation

    摘要
  • 摘要: 为了提高恒定导通时间(constant on-time, COT)调制开关变换器的输出电压稳压精度,基于COT调制和双缘脉冲宽度调制的特点,提出了一种工作于电感电流连续导电模式(continuous conduction mode, CCM)的开关变换器双缘恒定导通时间(dual-edge constant on-time, DCOT)调制方法.介绍了DCOT调制数字电压型控制Buck变换器的工作原理,对比分析了COT调制和DCOT调制数字电压型控制Buck变换器的稳态性能和瞬态性能.结果表明:相比于COT调制,采用DCOT调制的数字电压型控制Buck变换器提高了输出电压的稳压精度,其大小为输出电压纹波峰峰值的50%,且瞬态调节时间减少了1个开关周期.最后,通过仿真和实验结果证明了理论分析的正确性.

     

    Abstract: To improve the accuracy of output regulation in a switching converter with constant on-time (COT) modulation, dual-edge constant-on time (DCOT) modulation scheme for the switching converter in continuous conduction mode was proposed, based on the characteristics of COT modulation and dual-edge pulse-width modulation. The principle of digital voltage-mode controlled Buck converter with DCOT modulation was introduced. Moreover, its steady-state and transient performances were analyzed and compared with those of digital voltage-mode controlled Buck converter with COT modulation. The results show that digital voltage-mode controlled Buck converter with DCOT modulation improves output-regulation accuracy by 50% of peak-to-peak value of output voltage ripple and reduces the transient regulation time by one switching cycle. Finally, the simulation and experimental results validate the correctness of the theoretical analysis.

     

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出版历程
  • 收稿日期:  2014-05-09
  • 刊出日期:  2015-02-25

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