6 research outputs found

    Reatores eletrĂŽnicos dimerizĂĄveis para lĂąmpadas fluorescentes com elevavdo fator de potĂȘncia

    Get PDF
    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro TecnolĂłgico. Programa de PĂłs-Graduação em Engenharia ElĂ©tricaO trabalho trata do estudo de reatores eletrĂŽnicos dimerizĂĄveis com alto fator de potĂȘncia para lĂąmpadas fluorescentes. Inicialmente Ă© feito um estudo sobre as caracterĂ­sticas das lĂąmpadas obtendo-se um modelo para a simulação e para o estudo analĂ­tico dos mĂ©todos de controle de luminosidade. SĂŁo tambĂ©m apresentadas as tĂ©cnicas de dimerização difundidas na literatura e as tecnologias de gerenciamento dos sistemas de iluminação. A seguir Ă© apresentada a anĂĄlise do conversor boost operando no modo de condução crĂ­tica utilizado como estĂĄgio PFC, resultando em uma estrutura com reduzida taxa de distorção harmĂŽnica na corrente de entrada, elevado fator de potĂȘncia e que atende as restriçÔes impostas pela norma que regulamenta o setor. Finalizando o estudo, as anĂĄlises teĂłricas, as simulaçÔes e as metodologias de projeto sĂŁo apresentadas e protĂłtipos de laboratĂłrio sĂŁo implementados com o intuito de verificar a validade de cada estrutura proposta. Ao final Ă© apresentada uma conclusĂŁo sobre as caracterĂ­sticas das estruturas e algumas sugestĂ”es para o prosseguimento da pesquisa nesta ĂĄrea

    Proceedings of the 6th International Conference EEDAL'11 Energy Efficiency in Domestic Appliances and Lighting

    Get PDF
    This book contains the papers presented at the sixth international conference on Energy Efficiency in Domestic Appliances and Lighting. EEDAL'11 was organised in Copenhagen, Denmark in May 2011. This major international conference, which was previously been staged in Florence 1997, Naples 2000, Turin 2003, London 2006, Berlin 200h9a s been very successful in attracting an international community of stakeholders dealing with residential appliances, equipment, metering liagnhdti ng (including manufacturers, retailers, consumers, governments, international organisations aangde ncies, academia and experts) to discuss the progress achieved in technologies, behavioural aspects and poliacineds , the strategies that need to be implemented to further progress this important work. Potential readers who may benefit from this book include researchers, engineers, policymakers, and all those who can influence the design, selection, application, and operation of electrical appliances and lighting.JRC.F.7-Renewable Energ

    A History of Materials and Technologies Development

    Get PDF
    The purpose of the book is to provide the students with the text that presents an introductory knowledge about the development of materials and technologies and includes the most commonly available information on human development. The idea of the publication has been generated referring to the materials taken from the organic and non-organic evolution of nature. The suggested texts might be found a purposeful tool for the University students proceeding with studying engineering due to the fact that all subjects in this particular field more or less have to cover the history and development of the studied object. It is expected that studying different materials and technologies will help the students with a better understanding of driving forces, positive and negative consequences of technological development, etc

    Skylab Operations Handbook Command/Service Modules CSM 116 Thru 118

    Get PDF
    The SKYLAB Operations Handbook (SOH) is a contractual document. The SOH (Volume 1) is system-oriented and not specifically designed for utilization by any special group. Volume 1 is the description portion of the SOH. It provides the description of all Command-Service Module (CSM) systems
    corecore