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Itens para a visualização no momento 21-30 of 53
Emprego de um comutador eletrônico de taps para regulação de tensão em redes elétricas a partir do modelo de carga
(Universidade Federal de Santa Maria, 2018-08-31)
This doctoral thesis proposes a method for regulating the secondary voltage of distribution systems
based on the identification of ZIP models of the load (constant impedance, constant current and
constant power) at 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 ...
Análise estática normalizada e modelagem de pequenos sinais do conversor classe-e utilizando transformadores piezoelétricos
(Universidade Federal de Santa Maria, 2011-08-04)
Piezoelectric transformers (PTs) allow the design of promising power supply applications, increasing
efficiency, reducing size, facilitating the achievement of high transformation ratio, besides providing
high immunity ...
Metodologia de projeto do conversor DAB aplicado a transformadores de estado sólido
(Universidade Federal de Santa Maria, 2014-08-01)
This thesis presents a design methodology for the dual active bridge converter, that includes the influence of the nominal phase-shift angle in the behavior of the DAB converter for entire power and voltage ranges. The ...
Microinversores baseados na topologia meia-ponte isolada alimentada em corrente
(Universidade Federal de Santa Maria, 2018-07-25)
The Microinverter is an inverter sized to meet individual solar panels, usually consisting of two stages, one DC-DC stage and another CC-AC stage. For the first stage of the DC link microinverter, the isolated current-fed ...
Metodologia de otimização de conversores estáticos com paralelismo de células boost aplicado à célula a combustível
(Universidade Federal de Santa Maria, 2019-02-28)
This thesis presents an optimized design methodology for non-isolated static converters with Nboost
cells in parallel, that process energy between a renewable energy source and a DC bus. The
method scans for the best ...
Estudo e comparação de sistemas de acionamento para aplicações de alta potência e média tensão
(Universidade Federal de Santa Maria, 2010-08-24)
This Ph.D. Thesis proposes a comparison of modulation techniques, semiconductors devices technologies and topologies for multilevel inverters, in order to point out the multilevel drive system that presents the best ...
Desenvolvimento de um driver de injeção direta para motores ciclo otto empregando controlador repetitivo no estágio de saída
(Universidade Federal de Santa Maria, 2019-12-06)
This term paper proposes the development of a direct injection driver for solenoid injectors applied to Otto engines, employing a repetitive controller on the output stage. The fuel injectors typically used in direct ...
Conversor boost com indutor acoplado de arranjo diferencial com grampeador ativo com comutação em zero de tensão
(Universidade Federal de Santa Maria, 2022-07-27)
The population grouth and technological development led to increasing energy
demand in the world, which leads many countries to look for fossil fuels to meet the
increasing energy damand in the world. The use of fossil ...
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 ...