Design and analysis of an improved voltage‐lift‐based extended quadratic gain boost converter with reduced voltage stress across components

Abstract

SummaryIncreasing the voltage gain of traditional boost converter topologies necessitates an unsustainable increase in the operating duty ratio. Because of their inherent architecture, these topologies are incapable of shielding their individual components from the detrimental effects of extreme duty cycle operation, resulting in increased power loss and inefficient performance. With the objective of attaining a higher voltage gain at a lower duty cycle, this research presents a new quadratic type boost converter derived from an improved voltage‐lift (IVL) cell and the conventional boost converter (CBC). By including an IVL cell in CBC, the voltage conversion ratio is quadratic in nature, and the steady‐state performances are improved over those of CBC. This proposed architecture includes a few new parts, such as capacitors, diodes, and an inductor but no controllable switches, thus the close loop control stays the same. During the entire range of the duty cycle, the proposed boost topology outperforms the conventional quadratic boost converter (CQBC) in terms of dc voltage gain. In addition, the voltage stresses on devices (such as switch and diodes) and intermediate capacitors are reduced compared with CQBC. In steady‐state conditions, the voltage gain and design expressions of the storage elements are determined using time‐domain analysis. The suggested extended quadratic gain boost converter (EQGBC) stands out because of its multiple benefits over existing step‐up converter topologies. The suggested EQGBC has been tested by simulation and hardware implementation to ensure its key performance features. A laboratory‐scaled prototype is developed, which has the capability of boosting the low input voltage of 12 V to a higher value of 48 V at a switching frequency of 100 kHz. The experimental outputs are in close accord with the simulation findings and mathematical analysis.