H桥Buck变换电路输出电压幅相特性的研究  

Research on Capacitor Voltage's Phase-shift in Single Phase H-bridge Buck Circuit

作　　者：路茂增[1] 王艳红[1] 张加胜[1] 马西庚[1] 

机构地区：[1]中国石油大学(华东),山东青岛266555

出　　处：《电源世界》2011年第9期26-29,共4页The World of Power Supply

摘　　要：带二阶滤波的单相桥式Buck变换电路存在输出纹波电压移相的问题。本文结合单相桥式Buck电路模型,通过研究其降压原理及输出电压特性,分析了开关管占空比对输出电压纹波相移的影响,结合元器件的电学特性做出了定性分析,并利用数学推导给出了定量计算公式,便于变流器的器件选择和参数设计。最后,建立了基于MATLAB/SIMULINK的单相桥式Buck电路的仿真模型,仿真结果证实了理论分析方法和定量分析结果的正确性。。Output ripple voltage＇ s phase shifting exists in single phase Buck circuit with a second-order filter. Single phase Buck circuit is modeled, and it＇s step-down principle and output character are researched. Duty cycle＇s effect on output ripple voltage＇ s phase shifting is analyzed. Qualitative analysis combined with device＇s electric properties is given, and qualitative calculation formula is derived, both of which are beneficial to choose devices and design their parameters. Single phase Buck circuit＇ s model is simulated by MATLAB/SIMULINK, and simulation results verify the correctness of theoretical analysis method and qualitative calculation results.

关 键 词：H桥 BUCK电路 纹波电压 移相 

分 类 号：TN86[电子电信—信息与通信工程]