Super-Boost变换器的工作模式及输出纹波电压分析  

Analysis of Operation Modes and Output Ripple Voltage of Super-Boost Converter

作　　者：皇金锋[1] 韩梦祺 HUANG Jinfeng;HAN Mengqi(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723001,China)

机构地区：[1]陕西理工大学电气工程学院,汉中723001

出　　处：《电源学报》2024年第1期11-21,共11页Journal of Power Supply

基　　金：陕西省自然科学基金资助项目(2023-JC-YB-442)。

摘　　要：Super-Boost变换器代替传统的充、放电模块可大大减小电源的质量和体积,提高其功率密度,因此在空间电力系统中具有广阔的应用前景。但由于Super-Boost变换器有多个功率元件,且存在电感电流反向流动特性,导致其供能模式及输出纹波电压较传统Boost变换器复杂。为了给Super-Boost变换器的分析和设计提供正确的理论指导,对Super-Boost变换器供能模式及输出纹波电压进行了深入研究。研究发现,电感L_(1)和L_(2)均存在连续导电模式、伪连续导电模式和伪断续导电模式等工作模式,建立各工作模式的临界电感和输出纹波电压解析数学模型,探讨峰值电流与电感间的关系,得到了满足设计要求的最小电容和最小电感,据此给出了变换器参数设计方法,实验结果验证了理论分析的正确性。A Super-Boost converter can greatly reduce the mass and volume of power supply and improve the corresponding power density by replacing the traditional charging and discharging module,so it has a broad application prospect in space power system.However,due to the existence of multiple power components and the reverse flow characteristics of inductance current,its power supply mode and output ripple voltage are more complex than those of the traditional Boost converter.To provide a theoretical guidance for the analysis and design of the Super-Boost converter,its power supply mode and output ripple voltage are studied.It is found that there exists continuous conduction mode,pseudo continuous conduction mode and pseudo discontinuous conduction mode in both inductor L_(1) and L_(2).The analytical mathematical models of critical inductance and output ripple voltage in each operation mode are established,the relationship between peak current and inductance is discussed,and the minimum capacitance and minimum inductance that meet the design requirements are obtained.On this basis,a design method for the converter parameters is given,and experimental results verify the theoretical analysis.

关 键 词：Super-Boost变换器 工作模式 临界电感 输出纹波电压 参数设计 

分 类 号：TM46[电气工程—电器]