Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

Palavras Chaves: conversor boost isolado, conversor de alto ganho de tensão, retificadores multiplicadores de tensão

Resumo

Neste artigo é apresentada uma proposta conversor CC-CC isolado de alto ganho de tensão. O conversor proposto é resultado da combinação do conversor boost isolado com um retificador multiplicador de tensão Cockcroft-Walton. As principais características do conversor proposto em relação ao conversor boost isolado são: alto ganho de tensão; baixo esforço de tensão nos interruptores; baixo esforço de tensão nos diodos. A análise estática com as etapas de operação, formas de onda do conversor no modo de condução contínua, metodologia de projeto e estimativa de perdas são mostradas. Com o objetivo de verificar o desempenho do conversor proposto, um protótipo foi implementado considerando um painel fotovoltaico de 200 W como fonte de energia, alcançando uma eficiência de 95,48 %.

Title: HIGH STEP-UP ISOLATED BOOST CONVERTER WITH COCKCROFT-WALTON VOLTAGE MULTIPLIER RECTIFIER

Keywords: high step-up converter, isolated boost converter, voltage multiplier rectifier

Abstract

This paper proposes a high voltage gain isolated DC-DC converter. The proposed converter is the result of the combination of the isolated boost converter with a Cockcroft-Walton voltage multiplier rectifier. Its main characteristics are: high voltage gain; low voltage stress in the switches; low stress voltage in the diodes. Static analysis with operating steps, converter waveforms in continuous conduction mode, design methodology and loss estimation are shown. In order to verify the performance of the proposed converter, a prototype was implemented considering a photovoltaic panel of 200 W, reaching an efficiency of 95.48%.

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