Uma metodologia de otimização para sistemas de iluminação que empregam LEDs

• Ano de defesa: 2015
• Autor(a) principal: Guisso, Ronaldo Antonio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Engenharia Elétrica; UFSM; Programa de Pós-Graduação em Engenharia Elétrica
• Palavras-chave em Português: Diodos emissores de luz; Dissipadores de calor; Luminária; Metodologia de otimização; Sistema de iluminação; Vida útil; Heat sink; Lifetime; Light emitting diode; Lighting system; Luminaire; Optimization methodology; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/8559

This work presents an optimization methodology for lighting systems that employ LED. Initially, this work brings a calculation methodology capable of obtaining a thermal resistance of heat sink from their dimensions of area, besides enable optimization of the system through reducing their volume by through of change in the number of finned, length and consequently the weight of heat sink. Subsequently, the thesis present a new optimization methodology that has the objective of find the optimal point of operation lighting system taking into consideration the parameters of application current in the device, luminous flux, junction temperature, thermal resistance heat sink, number of LED and lifetime. An example of project is shown, confirming the theory, where the obtained results through of routine calculation coincided with the values found in experimental. The work also present the development of electronic topologies to power a public lighting system employing LED. Therefore, a driver to power of LED based in the integrated two-flyback converters was proposed. One prototype this system was implemented, where the luminaire provide a power of 63W. The experimental results proved the project methodology through of system satisfactory operation, presenting power factor near unit, high efficiency and a low input current distortion was obtained.