A Novel Y‐Sepic High Boost DC‐DC Converter for Renewable Energy Applications

This paper proposes a novel Y‐Sepic high boost DC‐DC converter, which is characterized by high voltage gain, continuous input current, low voltage stress of the switch and diodes, and high efficiency. The proposed converter is obtained by hybridizing the Y‐source and Sepic converters. With the coupled inductor turns ratio introduced in the converter, the circuit can operate in an appropriate duty cycle D while maintaining high voltage gain. The working states of the proposed converter are discussed. Then, the voltage and current stresses of components are deduced. The device design considerations have been presented. The power losses and efficiency are calculated. The derivation of the real voltage gain and the voltage gain in DCM have been performed. Besides, a small signal analysis and comparisons with other topologies have been conducted. Finally, a prototype made in the laboratory verifies the effectiveness of the proposed converter. The efficiency is 94.6% when the output power reaches 300 W.