摘要
为了提高Buck变换器的本质安全性能,将三电平技术应用于Buck变换器。分析了Buck三电平变换器(Buck TL)的纹波特性和本安性能,得出在相同电路参数下,Buck三电平变换器的电感电流纹波至少减小至传统Buck变换器的1/2,输出电压纹波至少减小至1/4,且在占空比D=0.5时极小;在相同纹波要求时,Buck三电平变换器所需的滤波电感至少减小1/2,滤波电容减小1/2,从而输出短路时释放的最大能量减小,输出本安性能显著提高。通过Saber仿真和实验验证理论分析的正确性。
In order to improve the intrinsically safe properties in the Buck converter,three-level technology was applied to the Buck converter.Analyzed the ripple current and ripple voltage characteristics and the intrinsically safe properties of the Buck three-level converter.With the same circuit parameters as the Buck converter,the ripple current of the filter inductor of the Buck three level converter reduces to 1/2 at least,the output voltage ripple reduces to 1/4 at least and achieves the minimum in the duty cycle D =0.5.With the same desired current and voltage ripple as the Buck converter,the required filter inductor in the Buck three-level converter reduces 1/2 at least and the filter capture 1/2 exactly,the maximum released energy of the output short circuit reduces,the intrinsically safe properties improve significantly.The simulation results in Saber and experimental results prove the correctness of the theoretical analysis.
出处
《煤矿机械》
北大核心
2013年第6期92-94,共3页
Coal Mine Machinery
基金
国家高技术研究发展计划(863计划)(2012AA062103)
