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Itens para a visualização no momento 91-100 of 433
Conversor eletrônico de alto fator de potência para alimentação de leds aplicando a técnica input current shaper
(Universidade Federal de Santa Maria, 2017-07-31)
This work presents analysis, simulation, design and implementation of an integrated topology consisting of two static DC-DC converters to supply power LEDs, presenting high power factor. Power factor correction is essential ...
Técnica de comunicação por luz visível em um conversor rebaixador para sistemas de iluminação a LED
(Universidade Federal de Santa Maria, 2018-02-27)
This work presents the complete formulation of a synchronous buck converter operating as a
Light Emitting Diode (LED) driver for Visible Light Communication (VLC). It also presentes
a state of the art review on VLC ...
Metodologia para coordenação e seletividade da proteção em sistemas de distribuição incluindo avaliação de confiabilidade
(Universidade Federal de Santa Maria, 2018-02-23)
The electric distribuition system is constantly evolving, in which new strategies,
methods and technologies are added to improve its functionality, examples of this are smart
grids and distributed generation. But these ...
DIFMA: firewall distribuído com ênfase na interoperabilidade entre aplicações no contexto das redes elétricas inteligentes
(Universidade Federal de Santa Maria, 2017-08-16)
The Electric Power System (EPS) has been improved in recent years, aiming at the implementation
of Smart Grids (SG). For this, it is essential to integrate information technologies
and bidirectional communication networks ...
Metodologia para análise técnica e econômica para atendimento de consumidores rurais incluindo GD
(Universidade Federal de Santa Maria, 2017-09-25)
This work presents a methodology for technical and economic analysis for the attendance of residential loads, with different demands and located in the rural area, with the use of distributed generation sources that can ...
Método de dimensionamento de sistemas autônomos fotovoltaicos de iluminação pública baseado na análise da dinâmica diária de geração e consumo
(Universidade Federal de Santa Maria, 2018-03-26)
This work presents a method for the analysis and sizing of autonomous photovoltaic systems applied in public lighting using LED lamps. To perform this sizing, daily production and consumption data are used, increasing the ...
Otimização do projeto dielétrico de transformadores de distribuição por meio de simulações em elementos finitos
(Universidade Federal de Santa Maria, 2018-02-26)
This work presents a methodology for optimization of the dielectric design of
distribution transformers by defining three constructive parameters of the
manufacturing process of the low and high voltage coils. Its main ...
Projeto e implementação de um pré-regulador de fator de potência aplicado a lâmpadas fluorescentes t5 com fluxo luminoso variável
(Universidade Federal de Santa Maria, 2016-12-23)
In this master thesis, the development of an electronic ballast with variable luminous flux for
a T5 fluorescent lamp is presented. Several technics for the control of the power variation have
already been discussed in ...
Lógica fuzzy para avaliação de eficiência energética em sistemas de irrigação de lavouras de arroz
(Universidade Federal de Santa Maria, 2017-03-24)
Energy efficiency plays an important role in electric power systems, since a small percentage increment in efficiency may lead to significant financial and energy savings. In agricultural-based economy countries, large ...
Estudo comparativo entre semicondutores de silício e nitreto de gálio em circuitos de acionamento de leds
(Universidade Federal de Santa Maria, 2017-03-03)
This dissertation presents a comparative study about the performance of silicon (Si) and gallium nitride (GaN) semiconductors in drivers for light emitting diodes. Hereby, it is expected to provide the theoretical background ...