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

This 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 a...

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Bibliographic Details
Published in:International journal of circuit theory and applications 2022-03, Vol.50 (3), p.944-963
Main Authors: Alencar Freitas, Antonio Alisson, Carneiro de Araújo, Francilino, Pereira Aragão, Francisco Aldinei, Alves de Souza, Kleber Cesar, Tofoli, Fernando Lessa, Mineiro Sá, Edilson, Luiz Marcelo Antunes, Fernando
Format: Article
Language:English
Subjects:
boost converter
Capacitors
Conversion ratio
coupled inductors
Electric potential
Electromagnetic interference
high step‐up
Inductors
non‐isolated DC–DC converters
soft switching
Topology
Voltage
Voltage converters (DC to DC)
voltage multiplier cells
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Summary:This 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. A non‐isolated DC–DC boost converter based on coupled inductors, a step‐up cell, and a voltage multiplier cell (VMC) is proposed and thoroughly assessed.
ISSN:0098-9886
1097-007X
DOI:10.1002/cta.3182