High Static Gain Boost-Ćuk DC-DC Converter

This study presents a DC-DC converter with a high static conversion ratio, resulting from the combination of boost and Cuk topologies. This new topology achieves a high static gain by transferring the voltage from the intermediate capacitor to a switched capacitor connected in series with the output capacitor. Additionally, it is possible to obtain a voltage step-up/step-down output. Therefore, the studied converter can provide two output connections with a wide voltage range. Initially, static analysis is performed, including operation stages and the static gain curve. Finally, a prototype is built with a switching frequency of 100 kHz, a power of 1 kW, and a theoretical efficiency of 95.1 %. Modulation is carried out with an FPGA to validate the theoretical analysis.