Non-Isolated Coupled Inductor Based DC-DC Converter with High Voltage Conversion Ratio Recommended for Renewable Applications

In this work, a high step-up non-isolated DC-DC converter with a coupled inductor is introduced for renewable applications. The output voltage rate of the proposed structure is efficiently excesses by choosing an appropriate turn’s ratio of the coupled inductor. The voltage lift elements are utilized to further increase the voltage gain and also leads to a decrease in the voltage spike through the switch. The produced leakage inductance energy of the coupled inductor can be retrieved which leads to a decrease in the power losses of the suggested converter. Moreover, conduction losses are decreased by utilizing only a single switch with lower ON-state resistance RDS-ON. In order to indicate the proficiency of the recommended structure, technical analysis and the comparison survey with other studies are carried out in the literature. Finally, a laboratory scheme at a 200 V/200 W with 24 V input voltage and 95.8% efficiency is prepared to prove the effectiveness of the suggested converter.