Projeto e análise de desempenho de um conversor ressonante LLC para aplicação em estações de carregamento de veículos elétricos

• Ano de defesa: 2024
• Autor(a) principal: Eleodoro, Osmar Felipe Alves
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; Brasil; Programa de Pós-graduação em Engenharia Elétrica
• Palavras-chave em Português: Análise de desempenho; Conversor ressonante série-LLC; Estações de carregamento de alta potência; Veículos elétricos; Electric vehicles; High-power charging stations; LLC series resonant converter; Performance analysis; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA; Engenharia elétrica; ODS::ODS 9. Indústria, Inovação e infraestrutura - Construir infraestrutura resiliente, promover a industrialização inclusiva e sustentável, e fomentar a inovação.; ODS::ODS 11. Cidades e comunidades sustentáveis - Tornar as cidades e os assentamentos humanos inclusivos, seguros, resilientes e sustentáveis.
• Link de acesso: https://repositorio.ufu.br/handle/123456789/43641; http://doi.org/10.14393/ufu.di.2024.609

This study analyses the performance of the LLC Series Resonant Converter for application in the isolation stage of power electronics converters used in electric vehicle battery charging stations. The analyses include two different operating modes: unity gain at resonant frequency and gain variation with frequency modulation. For the background, various aspects relating to high-power electric vehicle charging stations were discussed, including problems encountered in vehicle electrification and an extensive literature review on the subject. Theoretical and computational analyses, as well as experimental results obtained through the implementation of a prototype built in the laboratory on a reduced scale are presented. In order to achieve high levels of efficiency operating at high switching frequencies (above 100kHz), wide bandgap semiconductors were used, specifically silicon carbide. The results achieved efficiency above 97% for the experimental converter, and efficiency above 98% for the computer-simulated converter, at nominal power, validating the converter's application both as an isolating resonant converter and as an isolating converter responsible for output voltage variation.