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Análise de viabilidade de implantação de pequena central hidrelétrica na barragem Rodolfo da Costa e Silva
(Universidade Federal de Santa Maria, 2007-01-26)
This paper the assessment of the hydroenergetic potential at Rodolfo da Costa e Silva Barrage, which is the most important water resources reservoir that supplies the city of Santa Maria RS, considering the great dissipated ...
Projeto automático de controlador de velocidade sem sensor mecânico para motores de indução trifásicos
(Universidade Federal de Santa Maria, 2008-08-27)
This works proposes parameters estimation algorithm to auto-tune the control
laws of a speed sensorless servo. The identification process of the electrical and
mechanical parameters is based on recursive least squares ...
Projeto e desenvolvimento de uma fonte de potência CA trifásica a quatro fios
(Universidade Federal de Santa Maria, 2006-04-06)
This work presents a contribution to the study of AC Power Sources, where a prototype s development is
presented. The stages that compose the system, including converter topology, filter, instrumentation and
controller, ...
Identificação automática dos parâmetros elétricos de motores de indução trifásicos
(Universidade Federal de Santa Maria, 2008-08-26)
This work presents an algorithm able to identify all electrical parameters of three
phase induction motor, with discrete realization, using a fixe-point digital signal
processor based platform. Some techniques presents ...
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 ...
Metodologia de projeto de fontes ininterruptas de energia monofásicas empregando controladores de ação repetitiva auxiliar no estágio de saída
(Universidade Federal de Santa Maria, 2006-12-18)
The present doctoral thesis concentrate efforts in the consolidation of the benefits introduced by the plug-in repetitive action in the performance of pulse-width modulated
voltage source inverters. The work is focused ...
Sistema de iluminação distribuída utilizando LED's acionados por dois conversores flyback integrados
(Universidade Federal de Santa Maria, 2007-07-20)
This dissertation describes the design and implementation of an emergency lighting system using Light Emitting Diodes (LED s). The system is composed by two integrated converters working as battery charger and LED s ...