Research on Energy Transmission Mode of Cascaded CCM Boost Converter

Analyse the energy transmission mode of cascaded CCM boost converter during the switches off.Comparing the lowest inductor current with the output current,the converter can be divided into two modes: Complete Inductor Supply Mode(CISM) and Incomplete In-ductor Supply Mode(IISM). The critical inductor between CISM and IISM is derived.In the case of certain load,capacitor and switch fre-quency,the output ripple voltage of CISM has nothing to do with inductor and is lower than that of IISM,whose output ripple voltage de-creases with inductor increases.