ABSTRACT

A new type of Quadratic Buck–Boost Converters with Switched Inductor Network is proposed. To analyze the output voltage ripple characteristics of the Quadratic Buck–Boost Converters with Switched Inductor Network. According to the operation modes between input inductor and storage energy inductor of Quadratic Buck–Boost Converters with Switched Inductor Network, the operation modes of the converter are divided. The energy Transmission process of storage energy inductor in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) of Quadratic Buck–Boost Converters with Switched Inductor Network is analyzed. According to the comparison between the minimum current flowing through the energy storage inductor and the output current, It is proposed that the energy transmission of the energy storage inductor working in CCM is divided into complete power supply mode (CISM) and incomplete power supply mode (IISM). and The boundary inductance between CISM and IISM are obtained. Therefore, the Quadratic Buck–Boost Converters with Switched Inductor Network can be divided into CISM-CCM, IISM-CCM and DCM. The output ripple voltage of three modes is analyzed in detail, and the expression of output ripple voltage of energy storage inductor in three operating modes are deduced, respectively, and the relationship between output ripple voltage and energy storage inductor is summarized. It is concluded that the boundary inductance of CISM and IISM is the minimum inductance to minimize the output ripple voltage of the converter. Finally, the correctness of the theoretical analysis is verified by experiments.

摘要

提出了一种带有开关电感网络的新型二次降压-升压转换器。分析带有开关电感网络的二次降压-升压转换器的输出电压纹波特性。根据带有开关电感网络的二次Buck-Boost变换器的输入电感和储能电感之间的工作模式，划分了变换器的工作模式。分析了带有开关电感网络的二次降压-升压转换器的连续导通模式（CCM）和不连续导通模式（DCM）下储能电感的能量传输过程。根据流过储能电感的最小电流与输出电流的比较，提出将工作在CCM下的储能电感的能量传输分为完全供电模式(CISM)和不完全供电模式(IISM)。得到CISM和IISM之间的边界电感。因此，带有开关电感网络的二次降压-升压转换器可以分为CISM-CCM、IISM-CCM和DCM。详细分析了三种工作模式下的输出纹波电压，分别推导了三种工作模式下储能电感输出纹波电压的表达式，总结了输出纹波电压与储能电感之间的关系。结论是CISM和IISM的边界电感是使转换器的输出纹波电压最小化的最小电感。最后，