Static Converter
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Análise, projeto e implementação de um conversor com ampla faixa de tensão de entrada aplicado a iluminação de estado sólido
Currently research has pointed to LEDs as the technology more efficient and durable to be used in lighting, however, it requires a static converter in order to control the electrical current flowing through the LED lamp. In this context, this work present the analysis, design and implementation of a DC/DC converter with wide input voltage range called Boost-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/05/2012
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2. Integrated design & control of a buck boost converter
This paper presents the integrated design and control of a buck boost converter (BBC). In the proposed methodology the design tool provides simultaneously the controller tuning and BBC design parameters in such a way that some closed-loop pre-specified static and dynamic behavior is obtained. This approach contrasts with the traditional methodology, where th
Sba: Controle & Automação Sociedade Brasileira de Automatica. Publicado em: 2009-09
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3. INTEGRAÇÃO DE PILHAS DE CÉLULAS A COMBUSTÍVEL COM OUTRAS FONTES ALTERNATIVAS DE ENERGIA / INTEGRATION OF FUEL CELLS STACKS WITH OTHER ALTERNATIVE SOURCES OF ENERGY
This dissertation presents a project of a integrated system with distinct energy generating modules using a wind generator, photovoltaic generator, fuel cells stack (FCs) and an accumulator of energy formed by a bank of batteries. This system was implemented in the Center of Studies in Energy and Environment-CEEMA-UFSM. The alternative sources of energy were
Publicado em: 2009
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4. Acionamento vetorial de motores de indução trifásicos com enfraque-cimento de campo e maximização do conjugado por ampère
This work investigates the operation of three phase induction motors in field weakening and high speed regions. Maximum torque per ampère is imposed by using an indirect vector control strategy. Mathematical models that accounts for magnetic saturation is used for simulations and adjustment of controllers used in control algorithm. The driving structure is
Publicado em: 2008
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5. INTERACTION BETWEEN LOW-RIPPLE SWITCHED CONVERTERS AND FUEL CEL LS / INTERAÇÃO ENTRE CONVERSORES CHAVEADOS COM BAIXA ONDULAÇÃO E CÉLULAS DE COMBUSTÍVEL
This dissertation discusses the interaction between fuel cells and the DC-DC converter just connected across its terminals. For that, it presents a modified algorithm to represent the dynamic behavior of fuel cell stacks as much the current ripple effects from power converters on such cells. PEM type fuel cells (Proton Exchange Membrane) are studied to get a
Publicado em: 2007
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6. DESENVOLVIMENTO DE CONVERSORES ESTÁTICOS PARA SISTEMAS FOTOVOLTAICOS AUTÔNOMOS / DEVELOPMENT OF STATIC CONVERTERS TO STAND ALONE PHOTOVOLTAIC SYSTEMS
This work presents a new energy conditioning system for application in stand-alone photovoltaic systems with battery bank. Firstly, the characteristics of solar photovoltaic energy, the modeling of a photovoltaic cell and the equivalent electrical circuit are presented. In a second moment, the photovoltaic generation systems and a review of the static conver
Publicado em: 2007
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7. Efeito agudo e crônico do exercício resistido de alta intensidade sobre o torque, atividade eletromiográfica do vasto lateral e freqüência cardíaca de homens idosos.
The objective of this study was to investigate the acute and chronic effects of high intensity resistance physical exercise on the magnitude of maximal average torque response normalized by body mass (MAT), RMS amplitude of eletromyographic signals (EMGs) of the vastus lateralis and heart rate variation (∆HR). Subjects were nine non-smoking men (ages 6
Publicado em: 2007
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8. AnÃlise e controle de centrais eÃlicas a velocidade variÃvel utilizando ATPDraw / Analysis and control of wind farm at variable speed using ATPDraw
O presente trabalho apresenta estudos sobre o processo de conversÃo e conexÃo de turbinas eÃlicas a velocidade variÃvel, empregando gerador assÃncrono conectado à rede elÃtrica atravÃs de um conversor de freqÃÃncia totalmente controlÃvel. Todo o trabalho à desenvolvido em uma plataforma computacional de grande uso no setor elÃtrico, o ATPDraw, s
Publicado em: 2005
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9. Aplicação de redes neurais para o ajuste operacional do periodo final de sopro de um processo de aciaria a oxigenio
The present work describes the application of neural networks in the basic oxygen steelmaking process. Two neural models were developed: the prediction model and the inverse model. The first one aims to predict end-blow temperature and carbon percentage. The inverse model was built to provide end-blow corrective actions in oxygen and iron ore additions. In t
Publicado em: 2003
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10. HYDROELECTRIC GENERATION WITH ADJUSTABLE SPEED USING DOUBLE-FED MACHINES WITH A STATIC CONVERTER CONNECTED TO THE ROTOR S CIRCUIT / GERAÇÃO HIDRELÉTRICA EM REGIME DE VELOCIDADE AJUSTÁVEL EMPREGANDO MÁQUINAS DE DUPLA ALIMENTAÇÃO COM CONVERSOR ESTÁTICO NO CIRCUITO ROTÓRICO
Os sistemas de potência são projetados para operar com rígidos requisitos de qualidade, de modo que, as usinas hidrelétricas devem gerar energia, mantendo tensão e freqüência elétrica constantes. No método clássico de geração, a freqüência é controlada pelo sistema regulador de velocidade de turbina, que tende a manter a rotação da turbina f
Publicado em: 1997