Non‐isolated high step‐up DC–DC converter based on coupled inductors, diode‐capacitor networks, and voltage multiplier cells

Abstract

AbstractThis work presents a non‐isolated DC–DC boost converter employing coupled inductors, a diode‐capacitor network, and a voltage multiplier cell (VMC). This converter allows extending the conversion ratio not only by increasing the turns ratio of the coupled inductor, but also by adding more networks and VMCs, resulting in a more flexible design approach. Unlike most coupled‐inductor‐based boost‐type converters reported in the literature, the topology presents an output stage whose current is non‐pulsating, which leads to reduced electromagnetic interference (EMI) levels. Other prominent advantages include the fact that the input current is non‐pulsating with low high‐frequency ripple, as well as the operation of the switch and output diode under soft‐switching condition. Experimental results obtained from a 200‐W prototype are presented and discussed to validate the theoretical assumptions, also showing that the converter has high efficiency over a wide load range.