Buscar
Itens para a visualização no momento 41-50 of 3526
Desenvolvimento de metodologia do projeto do reator eletrônico auto-oscilante com entrada universal
(Universidade Federal de Santa Maria, 2010-01-14)
This work presents the design and analysis of an electronic system with universal input to supply a fluorescent lamp. The system includes a self-oscillating electronic ballast and an additional circuit which allows keeping ...
Desenvolvimento de uma fonte de potência CA para geração de formas de onda de até 2kHz
(Universidade Federal de Santa Maria, 2010-07-30)
This work presents the development of an alternating current power source with a single-phase full bridge voltage inverter, based on electronic switches. The source is designed to drive electromechanical and electric plants. ...
Projeto e implementação de lâmpadas para iluminação de interiores empregando diodos emissores de luz(LEDS)
(Universidade Federal de Santa Maria, 2008-10-31)
This work presents an efficient lighting system using high intensity light emitting
diodes (LEDs). The goal is to develop a compact and low cost electronic circuit to drive and
control the current of LEDs disposed in a ...
Tranformada wavelet e redes neurais artificiais na análise de sinais relacionados à qualidade da energia elétrica
(Universidade Federal de Santa Maria, 2009-02-10)
This work presents a different method for power quality signal classification using the principal components analysis (PCA) associated to the wavelet transform (WT). The standard deviation of the detail coefficients and ...
Integração de pilhas de células a combustível com outras fontes alternativas de energia
(Universidade Federal de Santa Maria, 2009-03-31)
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 ...
Contribuição ao estudo de estratégias de modulação aplicadas a conversores multiníveis com diodos de grampeamento
(Universidade Federal de Santa Maria, 2009-04-30)
This dissertation deals with modulation techniques for multilevel diode clamped converters.
The major challenge to be overcome by modulation strategies to these converters
is the balance of the dc-link voltage capacitors, ...
Proposta de um sistema híbrido composto por redes neurais artificiais e algorítmos genéticos para o tratamento de alarmes e o diagnóstico de faltas em sistemas elétricos de potência
(Universidade Federal de Santa Maria, 2011-02-18)
This work proposes a hybrid system for alarm processing and fault diagnosis in
electrical networks which use two methods of computational intelligence: Generalized
Regression Neural Network and Genetic Algorithms. The ...
Um controle ótimo aplicado a fontes ininterruptas de energia: projeto, validação experimental e análise de desempenho
(Universidade Federal de Santa Maria, 2011-02-17)
This work presents as contributions a design procedure for controllers applied to single-phase uninterruptible power supplies and the certification of the closed-loop stability
and performance using linear matrix inequalities. ...
Aproveitamento de fontes alternativas para redução do consumo de energia elétrica e reflexos nos seus custos
(Universidade Federal de Santa Maria, 2011-09-17)
Residential consumption accounts for around one third of total energy consumed in Brazil. The electric shower is the main component of this consumption, along with air conditioning. Hence, much research has been conducted ...
Métodos para otimização dos ajustes dos reguladores de tensão e zonas de tap em sistemas de distribuição
(Universidade Federal de Santa Maria, 2009-08-07)
The new regulations in the electric sector utilities have have requested greater efficiency and quality both in terms of continuity and in conformity of the energy
supplied. Electrical equipments quality, efficiency and ...