基于MATLAB的单端初级电感变换器的研究

Research of Single-ended Primary Inductance Converter based on MATALAB

单端初级电感变换器(SEPIC)作为一种DC-DC变换器既可以实现升压,也可以实现降压,而且转换效率较高,适用多种场合。该文详细分析了SEPIC拓扑结构的工作原理,提供了一种较为简单的各元件参数的选取方法,并给出了推导过程。重点阐述了电流连续模式(CCM)和临界连续工作模式(TM)下的工作机制,并利用MATLAB软件搭建仿真模型,实现了较小输出波纹的升压及降压功能。通过对仿真结果的分析验证了理论分析的正确性。

The converter of single-ended primary inductance converter（SEPIC）with high efficiency can achieve boost and buck , so it is applicable to a various of occasions. Tile working principle of SEPlC topology＇ structtwe is detailed analysis. A simple method for selecting the parameters of each element is supplied and the formula derivation process is giving. The working mechanism of the CCM and the TM is focused on, and the function of boost and buck within small ripple is achieved by building simulation model with MATLAB. Finally it verified the correctness （of the theoretical analysis through the analysis of the simulation resuhs.