摘要
通过传统buck变换器的三端口网络模型中引入一个开关电容,得到了一种新型带开关电容交错并联buck变换器。通过对新型变换器进行理论分析可知,与传统buck变换器相比,当占空比D<0.5时,新型变换器不仅输出电流纹波减小,且在相同占空比下实现了更高的电压增益;同时开关管的电压应力减小,其电流应力均为输出电流的一半,有利于器件的选择和散热。因此新型变换器非常适合于低输出电压、大电流的场合及输入、输出电压相差较大的系统。最后通过仿真验证了理论分析正确性。
Based on the three-teminal network of traditional buck converter ,the high step-up buck converter is proposed in this paper. The operation principle and property of the converter are analyzed in detail.Through theoretical analysis of the new converter, when the duty D〈0.5,the ripple of the output is reduced, and the voltage gain is higher in the same duty while compared with the traditional buck converter.At the same time, the vohage stress of the switches are reduced, which current stress is half of the output current, it is conducive to the selection of the devices and the heat sinks.Therefore, the new converter is very suitable for the low voltage and high current conditions and the system which has a large input and output.Finally, the simulation is built to verify the theoretical analysis.
出处
《电子技术应用》
北大核心
2017年第7期153-156,共4页
Application of Electronic Technique
基金
攀枝花市科技计划项目(2014CY-S-1-2
2015 CY-C-5)
四川省高校重点实验室项目(TYN2015-09)
四川省电力电子节能技术与装备重点实验室(szjj2015-066)
流体及动力机械教育部重点实验室研究基金(西华大学)
关键词
BUCK变换器
交错并联
三端口
buck converter
interleaved parallel
three-teminal switch-inductor network
