Encontrados 20 documentos, a visualizar página 1 de 2
Condicionadores ativos de potência para mitigação de problemas de qualidade de ...
Pinto, J. G.; Gonçalves, Henrique; Afonso, João L.Os condicionadores ativos são equipamentos baseados em eletrónica de potência que permitem mitigar de forma dinâmica diversos problemas nas tensões e nas correntes do sistema elétrico, contribuindo efetivamente para a melhoria da produtividade das indústrias, reduzindo os prejuízos provocados pelos problemas de Qualidade de Energia Elétrica.
Monitorização da qualidade da energia elétrica
Moreira, Rui P.; Gonçalves, Henrique; Pinto, J. G.; Afonso, João L.A monitorização da Qualidade da Energia Elétrica é uma mais-valia para os responsáveis pelas instalações elétricas, permitindo a otimização dos perfis de consumo e a identificação e prevenção de problemas.
O papel da subunidade "Perturbações no equilíbrio dos ecossistemas" na educação...
Gonçalves, Henrique António DantasRelatório de estágio de mestrado em Ensino de Biologia e de Geologia no 3º Ciclo do Ensino Básico e no Ensino Secundário ; A intervenção pedagógica decorreu numa escola Secundária/3 de Braga numa turma do 8.º ano, composta por 27 alunos, nas disciplinas de Ciências Naturais e Formação Cívica e visou compreender o papel da educação em ciências na educação para o desenvolvimento sustentável. A opção pela impleme...
Conversion of an internal combustion engine vehicle into an electric vehicle
Pedrosa, Delfim; Monteiro, Vítor; Gonçalves, Henrique; Exposto, Bruno; Pinto, J. G.; Afonso, João L.In this paper is described the conversion of an Internal Combustion Engine (ICE) vehicle into and Electric Vehicle (EV). The main steps of this conversion are briefly described, especially the standards to legalize EVs in Portugal, and the EV elements, mainly, the electric motor and its respective controller, and the batteries with the charging system. This paper also presents the modifications performed in t...
Development of a digital controller with data acquisition to a test bench for e...
Pedrosa, Delfim; Pereira, Rui; Gonçalves, Henrique; Exposto, Bruno; Monteiro, Vítor; Pinto, J. G.; Afonso, João L.The electric motors’ test benches are greatly used by electric motors manufacturers and drive system designers. In this paper it is described the conversion process of an older manually controlled test bench, in an automatic digitally controlled one with integrated data acquisition system. The renewed test bench is based in a two quadrant eddy current electromagnetic brake, in which the manual torque controller...
A simplified methodology for parameters measurement of an axial flux permanent ...
Pedrosa, Delfim; Gonçalves, Henrique; Exposto, Bruno; Martins, Júlio S.; Afonso, João L.The recent developments in the area of electric vehicles resulted in the growth of the interest for Axial Flux Permanent Magnet Motors, mainly because of their high power density. For the design of the motor drive it is of extreme importance to have the motor parameters, although many times the manufacturers do not provide them. To overcome this problem, in this paper is presented a methodology to obtain the pa...
Simulation results of a 1 kW photovoltaic system with MPPT function in the inve...
Gonçalves, Henrique; Hlaili, Manel; Amira, Haddouk; Mechergui, Hafidh; Afonso, João L.Photovoltaic pumping systems are commonly used in remote regions, where the access to electrical energy is difficult or very expensive. This paper presents simulation results of a 1 kW photovoltaic system proposed in a cascade topology, consisting of a DC-DC boost converter followed by a single-phase inverter. The Maximum Power Point Tracking (MPPT) function is performed by the inverter, instead of by the DC-DC...
Bidirectional multilevel converter for electric vehicles
Monteiro, Vítor; Pinto, J. G.; Ferreira, João C.; Gonçalves, Henrique; Afonso, João L.In this paper is presented an H-Bridge Multilevel Converter topology for Electric Vehicles (EVs) and Plug-in Hybrid Electric Vehicles (PHEVs). The topology of the presented multilevel converter allows the interface between the batteries, the electric motor of the vehicle, and the electrical power grid. Thereby, taking into account that the proposed multilevel converter requires the use of isolated voltage sourc...
Assessment of a battery charger for electric vehicles with reactive power control
Monteiro, Vítor; Pinto, J. G.; Exposto, Bruno; Gonçalves, Henrique; Ferreira, João C.; Couto, Carlos; Afonso, João L.Batteries of Electric Vehicles (EVs) and Plug-in Hybrid Electric Vehicles (PHEVs) have a large potential not only to provide energy for the locomotion of these vehicles, but also to interact, in dynamic way, with the power grid. Thereby, through the energy stored in the batteries, these vehicles can be used to regulate the active and the reactive power, as local Energy Storage Systems. This way, EVs can contrib...
Current-source shunt active power filter with periodic-sampling modulation tec...
Exposto, Bruno; Pinto, J. G.; Pedrosa, Delfim; Monteiro, Vítor; Gonçalves, Henrique; Afonso, João L.In this paper are presented experimental and simulation results of a developed Current-Source Three-Phase Shunt Active Power Filter compensating the currents of a non-linear load. The Shunt Active Power Filter controller, described in detail along the paper, relies in the p-q Theory to calculate the reference compensation currents and to regulate the DC-link inductance current. The regulation of the...
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