An efficient interleaved high step-up converter with winding-cross-coupled inductor and common active clamp for photovoltaic applications

This paper presents a high-efficiency and high-step up Non isolated interleaved dc-dc converter with a boost converter as clamp circuit. In the proposed converter, the coupled-inductor boost converters are interleaved. A boost converter is used to clamp the voltage stresses of all the switches in the interleaved converter, caused by the leakage inductances present in the practical coupled inductors, to a low voltage level. The leakage energies of the interleaved converters are collected in a clamp capacitor and recycled to the output by the boost converter. The proposed converter achieves high efficiency because of the recycling of the leakage energies to the output, reduction of the switch voltage stress, mitigation of the output diode's reverse recovery problem, and interleaving of the converters. Detailed analysis and design of the proposed converter are carried out. A simulation of the proposed converter with the PSPICE software is done, and its results are presented for validation of design.