Switching regulator using a DC–DC step‐down non‐cascading converter

Abstract

In this study a DC-DC switching regulator with step-down capacity is presented. It uses a converter based on noncascading structures. A model of the converter, as well as a controller design procedure to achieve the regulation task, is presented. For the controller design, a control scheme that consists of two control loops is applied. The inner loop is built using the inductor current as feedback. The outer loop is implemented using a proportional-integral controller. The tuning procedure of the controller parameters was developed from the state-space non-linear averaged model of the converter, where the necessary conditions for the existence of an unique operating point and stability in closed-loop are obtained. To prove the effectiveness of the switching regulator, numerical simulations and experimental results are presented.

Quadratic buck–boost converter with positive output voltage and minimum ripple point design

“…The study of topologies is a very active research field in power electronics [1][2][3]. The canonical converters (buck, boost, buckboost) are commonly used in a wide number of applications, due to their simple structure and satisfactory performance.…”

“…Single‐stage quadratic topologies have been successfully implemented for extreme (high or low) voltage gain applications, but they do not usually perform switching ripple cancellation [2, 12, 13].…”