Buscar
Itens para a visualização no momento 11-20 of 57
Desenvolvimento de algoritmos para otimização da confiabilidade de redes de distribuição
(Universidade Federal de Santa Maria, 2004-12-16)
New regulations of the electricity sector have requested greater efficiency from the power utilities in the performance of their distribution systems, requiring more rigorous quality and continuity energy levels. This work ...
Bases experimentais para o projeto, automação e instalação de sistemas de geração de energia com células de combustível
(Universidade Federal de Santa Maria, 2005-09-15)
The main concern of this dissertation is the establishment of experimental bases for the project, automation, and installation of a micro-power plant for electric power generation based on PEM fuel cell stacks (BCS ...
Nova metodologia para a estimativa de capacitância e consumo de potência de portas lógicas complexas CMOS no nível lógico
(Universidade Federal de Santa Maria, 2005-10-31)
This dissertation presents a methodology of capacitance estimation and power consumption in CMOS circuits combinational constituted basically of complex logic gates at logic level. The main objective in the development of ...
Prototipação e análise de circuitos mutiplicadores array de baixo consumo
(Universidade Federal de Santa Maria, 2005-03-23)
This work presents the prototyping and analysis of new multiplier architectures under the physical level of abstraction. Circuits recently presented in the academic community are analyzed and compared against the state of ...
Projeto de reatores eletronicos para hid baseado no conversor chopper AC
(Universidade Federal de Santa Maria, 2007-08-24)
This thesis proposes a design of a power supply for high-pressure discharge lamps based on a high efficiency and high power factor electronic ballast, without exciting the
intrinsic acoustic resonance. The ballast consists ...
Rede de iluminação semicondutora para aplicação automotiva
(Universidade Federal de Santa Maria, 2005-02-28)
This work describes the design of a semiconductor lighting system applied to omnibus interiors. The system is composed by several lighting terminals, and some of them have different purpose, once an omnibus has different ...
Controlador nebuloso para motor de ignição por compressão operando com gás natural e óleo diesel
(Universidade Federal de Santa Maria, 2006-02-24)
A foreseeable shortage of petroleum, associated to a growing ecological conscience, demand for alternative sources of energy and more efficient and less pollutant combustion processes. Among the few pollutant fuels this ...
Análise da conexão de geradores eólicos duplamente alimentados com compensação série
(Universidade Federal de Santa Maria, 2008-08-29)
This dissertation addresses the main problems related to doubly-fed induction generators
(DFIG) connection to grids with unbalanced voltages. Series compensation is used
to achieve balanced voltage on the stator of the ...
Análise comparativa de inversores multiníveis com células H-bridge conectadas em série
(Universidade Federal de Santa Maria, 2006-04-20)
This Master Thesis presents a methodology to compare different topologies and configurations of multilevel systems applied to drive medium voltage induction motors. Initially, it presents the input and output parameters ...
Otimização da confiabilidade de sistemas de distribuição de energia elétrica: uma abordagem considerando a seleção e alocação de dispositivos de proteção e manobras
(Universidade Federal de Santa Maria, 2009-03-27)
One of the main goals of the electric utilities is to provide energy to its customers in a reliable and low
cost way. Traditionally, the electricity sector regulatory commissions impose continuity targets, which must be ...