Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

Palavras Chaves: Boost, Conversores CC-CC, Entrelaçado, Flyback, Indutor Acoplado

Resumo
Este trabalho realiza uma comparação de três conversores CC-CC não isolados de elevado ganho estático.Esses conversores são derivados de configurações em multiestágio, multi-fase, elementos magnéticos e células multiplicadoras de tensão. O artigo revisa os métodos empregados para gerar conversores com alta taxa de conversão e caracteriza-os individualmente e, em seguida, integra as técnicas para gerar os três conversores. A análise dos conversores inclui o número de componentes, esforços de tensão e corrente, perdas nos componentes, rendimento, ganho estático e ondulação da corrente de entrada. Os conversores foram testados com uma potência de 1 kW, uma tensão de saída de 800 volts e um ganho estático superior a 13 vezes. Os resultados experimentais confirmam o estudo teórico, na qual o conversor I obteve rendimento de 87%, enquanto os conversores II e III alcançaram rendimentos em torno de 95%.

Title: COMPARISON BETWEEN THREE HIGH GAIN NON-ISOLATED DC-DC CONVERTERS DERIVED FROM BOOST CONVERTER

Keywords: Boost, Coupled Inductor, Flyback, High step-up dc-dc converter, interleaved

Abstract

This work performs a comparison of three non-isolated high static gain DC-DC converters. These converters are derived from multi-stage, multi-phase configurations, magnetic elements, and voltage multiplier cells. The article reviews the methods employed to generate converters with high conversion ratio and characterizes them individually, and then integrates the techniques to generate the three converters. The analysis of the converters includes the number of components, voltage and current stresses, component losses, efficiency, static gain, and input current ripple. The converters were tested with a power of 1 kW, an output voltage of 800 volts, and a static gain exceeding 13 times. The experimental results confirm the theoretical study, in which Converter I achieved an efficiency of 87%, while Converters II and III achieved efficiencies around 95%.

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