High Step-up DC-DC Converter with Active Switched Inductor and Voltage Double Based on Three-winding Coupled Inductor

This paper proposes a high step-up dc-dc converter with three-winding coupled inductor, integrating an active switched inductor and voltage double to achieve voltage gain. The main merits of the proposed converter are high voltage gain, reduced voltage stress and current stress on the power switch. In addition, the source energy is transferred through the coupled inductor to the output during the entire switching time and the energy stored in the leakage inductor is recycled directly to the load without intermediate components. The proposed converter can be further derived to two varied converters for higher voltage gain. Finally, a fabricated 270 W with 30 V input voltage, 300 V output voltage is carried out to support the validity of the proposed converter.