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Técnicas de integração de circuitos de auxílio à comutação aplicadas a inversores e a sistemas multi-pólos
(Universidade Federal de Santa Maria, 2007-09-19)
This Ph. D. dissertation presents contributions to the investigation of soft-switching cells with integrated components, presenting three main approaches: (i) Soft-switching cells with filter coupled inductor; (ii) Integrated ...
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 ...
Novos métodos para reconfiguração das redes de distribuição a partir de algoritmos de tomadas de decisão multicriteriais
(Universidade Federal de Santa Maria, 2007-12-14)
The electric networks reconfiguration has as purpose: to reduce the energy losses, to improve the voltage profile for the customers, to increase the reliability levels or to re-establish the energy supply in contingency ...
Metodologia para a análise dos efeitos da geração distribuída sobre as características operacionais dos sistemas de distribuição utilizando técnicas multicriteriais
(Universidade Federal de Santa Maria, 2007-11-08)
Nowadays, the Brazilian electric systems need the development of new researches and tools, in order to obtain a logic solution to maintain and improve the reliability and the quality of the power delivered to customers. ...
Uma contribuição ao controle de motores de indução trifásicos sem o uso de sensores mecânicos
(Universidade Federal de Santa Maria, 2007-06-01)
This work presents contributions to encoderless speed servo study using three phase induction motor. Initially, a general overview on the literature is presented about control
techniques applied to encoderless speed servo ...
Contribuições ao estudo de conexão de geração eólica à rede elétrica
(Universidade Federal de Santa Maria, 2007-08-24)
Distribution systems have not been designed to receive distributed generation (DG) units. The electric energy injection in these systems is safe and reliable if the characteristics regarding of DG interconnection in ...
Desenvolvimento de conversores estáticos para sistemas fotovoltaicos autônomos
(Universidade Federal de Santa Maria, 2007-07-12)
This work presents a new energy conditioning system for application in stand-alone photovoltaic systems with battery bank. Firstly, the characteristics of solar photovoltaic energy, the modeling of a photovoltaic cell and ...
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 ...
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 ...
Integração de conversores estáticos aplicados a sistemas de iluminação pública
(Universidade Federal de Santa Maria, 2007-12-20)
This work presents a family of integrated electronic ballasts applied to the public lighting system. The electronic ballasts are designed to supply High-Pressure Sodium lamps according to the desired lamp operation ...