Abstract
In this paper, a novel high-gain transformer-less dc-dc converter is presented. This topology is acquired by integrating two high-gain cells like quasi-Z source (QZ) and gain multiplier (GM) cells with a quadratic boost converter. The boosting factor of the proposed topology is increased both in the numerator and denominator of the voltage conversion ratio, which furnishes flexibility in designing the converter. The cost of the converter is low due to lesser voltage stress across the devices. Operating principle and steady-state analysis of the converter are analyzed in continuous conduction and discontinuous conduction modes. Considering the boundary conduction mode and voltage ripple, the design expression of the passive components is derived. A suitable duty cycle for realizing higher voltage gain is determined. The performance of the converter is analyzed and compared to those of similar QZ-based converters. To validate the theoretical study, a 50 W prototype is implemented and tested.