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Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

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Issue: Volume 24 - number 3
Publishing Date: setembro 2019
Editor-in-Chief: Marcello Mezaroba
Editor Affiliation: Universidade do Estado de Santa Catarina - UDESC
CONVERSOR CC-CC DE ALTO GANHO BASEADO NO CONVERSOR CUK COM INDUTOR ACOPLADO E MULTIPLICADORES DE TENSÃO
Lenon Schmitz, Airton Isaac Pereira, Ronny Glauber de Almeida Cacau, Denizar Cruz Martins, Roberto Francisco Coelho
267-276
http://dx.doi.org/10.18618/REP.2019.3.0020
Portuguese Data

Palavras Chaves: Alto Rendimento, comutação suave, Conversor cc-cc de Alto Ganho, conversor Cuk, Indutor Acoplado, Multiplicador de Tensão

Resumo

Este artigo propõe um novo conversor cc-cc não isolado de alto ganho baseado no conversor Cuk com indutor acoplado e multiplicadores de tensão, acrescido de um filtro LC de entrada. O conversor proposto apresenta reduzidos esforços de tensão nos interruptores e permite o projeto de dispositivos magnéticos de volume reduzido. Além disso, o seu modo de operação ressonante possibilita comutação com tensão nula na ativação dos interruptores e comutação com corrente nula no bloqueio dos diodos, propiciando alto rendimento à topologia. Um protótipo de 200 W, com faixa de tensão de entrada de 25-40 V e tensão de saída de 400 V foi construído e testado experimentalmente. O protótipo do conversor proposto apresentou rendimento máximo de 96,5% e rendimentos ponderados da Comissão de Energia da Califórnia (CEC) superiores a 95% em toda a faixa de tensão de entrada.

English Data

Title: HIGH STEP-UP DC-DC CUK-BASED CONVERTER WITH COUPLED INDUCTOR AND VOLTAGE MULTIPLIER CELLS

Keywords: Coupled Inductor, Cuk converter, High Efficiency, High step-up dc-dc converter, soft switching, Voltage Multiplier

Abstract

This paper proposes a novel high step-up non-isolated dc-dc converter based on the Cuk converter with coupled inductor and voltage multiplier cells, and an input LC filter. The proposed converter has reduced voltage stresses over the switches and can be designed to present low volume magnetic devices. In addition, its resonant operation mode enables zero-voltage-switching (ZVS) turn-on of active switches and zero-current-switching (ZCS) turn-off of diodes, which increases its efficiency. A 200-W prototype with 25-40-V input and 400-V output voltages was built to verify the developed analysis. The experimental results show a maximum efficiency of 96.5% and weighted California Energy Commission (CEC) efficiencies greater than 95% over the whole input voltage range.

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