具有快速瞬态响应和宽稳定范围的交错并联Buck变换器恒流控制技术  

Constant-current Control Technique for Interleaving Buck Converter with Fast Transient Performance and Wide Stability Range

作　　者：胡文伟 周国华[1] 冷敏瑞 曹太强 阎铁生 HU Wenwei;ZHOU Guohua;LENG Minrui;CAO Taiqiang;YAN Tiesheng(Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle of Ministry of Education,Southwest Jiaotong University,Chengdu 611756,China;School of Electrical Engineering and Electronic Information,Xihua University,Chengdu 611039,China)

机构地区：[1]西南交通大学磁浮技术与磁浮列车教育部重点实验室,成都611756 [2]西华大学电气与电子信息学院,成都610039

出　　处：《电源学报》2020年第2期152-161,共10页Journal of Power Supply

基　　金：国家自然科学基金资助项目(61771405,61371033);成都市科技局资助项目(2016-HM01-00139-SF)。

摘　　要：将电荷控制与4相交错并联Buck变换器相结合,应用于恒流输出场合,拓宽了变换器的稳定范围,提高了变换器的瞬态响应速度;将其与峰值电流控制的4相交错并联Buck变换器进行对比,建立并统一了两者的小信号模型。在统一模型的基础上,分析了2种控制方法下变换器的稳定性和瞬态性能,从理论上证明了在没有添加斜坡补偿的条件下,电荷控制比峰值电流控制具有更宽的稳定范围和更优的瞬态性能。最后通过仿真和实验验证了理论分析的正确性。In this paper, a four-phase interleaving Buck converter is combined with charge control, which can be applied to scenarios with constant-current output. In this way, the controller' s stability range is extended and its transient response speed is improved. Moreover, it is compared with a peak-current-controlled four-phase interleaving Buck converter, and a unified small-signal model of both control methods is established, based on which the converter's stability and transient performances under these two kinds of control are analyzed. It is theoretically proved that when there is no ramp compensation, charge control has a wider stability range and a better transient performance than peak current control. Finally, simulation and experimental results verified the theoretical analysis.

关 键 词：交错并联Buck变换器 小信号模型 电荷控制 峰值电流控制 稳定性 瞬态性能 

分 类 号：TM46[电气工程—电器]