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Itens para a visualização no momento 11-20 of 23
Desenvolvimento de uma rede Fieldbus para gerenciamento do sistema de distribuição de energia elétrica
(Universidade Federal de Santa Maria, 2004-01-26)
This work describes the design and implementation of a Fieldbus
dedicated to energy management using a power modem with FSK
modulation. The main characteristics of Fieldbus commonly accepted in
the market are presented ...
Reator eletrônico auto-oscilante com alto fator de potência para alimentação de quatro lâmpadas fluorescentes independentes
(Universidade Federal de Santa Maria, 2004-02-27)
This work describes a high-power-factor electronic ballast to supply four
fluorescent lamps independently. Fluorescent lamp operational aspects are
discussed, and a mathematical model to simulate the fluorescent lamp ...
Contribuição à família de conversores CC-CC bidirecionais buck/boost
(Universidade Federal de Santa Maria, 2022-07-17)
With the search for clean renewable energies and the growing of the greenhouse
gases, there is an increase in the number of electric vehicles and own generation. As most
renewable energies are naturally in DC the best ...
Análise, projeto e implementação de um inversor PWM monofásico aplicado a UPS utilizando células de comutação suave
(Universidade Federal de Santa Maria, 2002-09-23)
This thesis presents an analysis, design and implementation soft
switching inverters for UPS applications. The inverters considered are constituted
of soft switching cells, which provide zero voltage switching (ZVS) for ...
Desenvolvimento de um sistema de controle e supervisão de inversor para turbinas eólicas
(Universidade Federal de Santa Maria, 2017-01-20)
The worldwide interest in renewable energy has increased, with a large emphasis on wind energy. In this sense, this work presents the supervision and control of an inverter for wind turbines. It uses a three-phase PWM ...
Otimização de operação dos meios básicos de controle de tensão em sistemas de distribuição
(Universidade Federal de Santa Maria, 2005-06-17)
This dissertation presents methods and algorithms to increase use efficiency of basic voltage control equipment on power distribution systems and also models for secondary distribution networks. This basic voltage control ...
Turbinas eólicas: modelo, análise, e controle do gerador de indução com dupla alimentação
(Universidade Federal de Santa Maria, 2004-12-21)
This thesis presents the main concepts and configurations used in wind turbine connected to the grid, as well as, an analysis, design and implementation of the control system for the Doubly Fed Induction Generator (DFIG). ...
Metodologia de síntese de topologias ZVT simplificadas aplicadas a pólos PWM bidirecionais
(Universidade Federal de Santa Maria, 2009-11-27)
Among the soft-switching techniques, the zero-voltage-transition (ZVT) technique has been accepted well by the industry due its attractive characteristics, such as simplicity, low losses in the auxiliary commutation circuit ...
Análise da influência da freqüência de comutação e da ondulação da corrente de entrada no projeto de conversores PFC para minimização do volume de magnéticos
(Universidade Federal de Santa Maria, 2006-03-31)
This work investigates the relationship among the magnetic volume, switching
frequency and input current ripple of a single-phase, 1kW boost based PFC converter
with universal input voltage range, complying with the ...
Análise das relações das tensões de entrada de inversores multiníveis híbridos conectados em cascata para minimizar a THD da tensão de saída
(Universidade Federal de Santa Maria, 2012-04-27)
This Master Thesis presents a study considering multilevel inverters formed from two and three level cascaded inverters.
The literature presents several papers on asymmetric multilevel inverters and most studies are related ...