Inversor monofásico isolado em alta frequência com ampla faixa de tensão de entrada

• Ano de defesa: 2007
• Autor(a) principal: Silva, Carlos Elmano de Alencar e
• Orientador(a): Oliveira Júnior, Demercil de Souza
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Engenharia elétrica; Eletrônica de potência; Conversão CC-CA
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/66724

This dissertation presents the analysis, design, simulation and experimental results of a single-phase high frequency isolated inverter, capable to operate with large input voltage range. Thus, this converter is feasible to alternative energy applications and battery source energy applications. The developed topology consists of a two stages structure of power processing. The first power processing stage is implemented by a push-pull converter to response by electrical isolation and by input voltage level rise, supplying continuous and regulated voltage in 420V. The second power processing stage is implemented by a full- bridge inverter, responsible by sine modulation of output voltage. The analysis of each one of the power processing stages is presented, after that, the full design of the power circuit is executed for a 400VA prototype, with 220V rms output voltage, 400Hz output frequency and 60-90V input voltage range. The frequency compensation is executed for each one of the power processing stages, assuring the operation stability, voltage regulation in load variations and 800Hz ripple attenuation inserted by full-bridge inverter. The full design of the controllers and general structure of the control circuits are shown. The simulation results of the designed converter for diverse loads and extreme operation conditions are present, which gives support to the build of the prototype. Finally the main experimental results of the laboratory prototype are shown.