一种基于脉冲序列控制的改进型Buck变换器

摘要

By improving the pulse train (PT) controlled conventional Buck converter,the low-frequency oscillation of the output voltage of PT-controlled traditional Buck converter is effectively suppressed when operating in continuous con duction mode (CCM).The operating modes of the improved Buck converter are analyzed,and the suppression method is discussed.Finally,the simulation and experimental results verify that the proposed Buck converter has the advantages of effective suppression of the low-frequency oscillation of the output voltage compared to the traditional PT-controlled Buck converter.%通过对传统的基于脉冲序列(PT)控制的Buck变换器拓扑电路进行改进,有效地抑制了传统的PT控制Buck变换器工作在电感电流连续模式(CCM)时出现的输出电压低频波动现象.详细分析该改进型Buck变换器的工作模态,得出抑制低频波动的原因.最后通过仿真和实验结果表明,该改进型Buck变换器相比于传统Buck变换器具有抑制输出电压低频波动的优点.