Buscar
Mostrando ítems 21-30 de 2544
Estudo do controle digital de um retificador boost trifásico bidirecional através de modulação vetorial
(Universidade Tecnológica Federal do ParanáCuritibaBrasilCurso de Engenharia de Controle e AutomaçãoUTFPR, 2018-12-03)
The rectifiers are Power Electronics devices commonly used in daily life and in the industry. They are responsible for convert the alternate current (AC) into direct current (DC). Yet, either controlled or non-controlled ...
Desenvolvimento de um retificador de alto fator de potência utilizando a topologia de dez pulsos
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Eletrotécnica, 2013-09-11)
This paper develops a three-phase rectifier, with a high input power factor, according to a topology which is still to be better explored, and present it as a possible alternative to the known and established six and twelve ...
Servo motores: visão geral, controle e aplicação
(Universidade Tecnológica Federal do ParanáCuritibaBrasilCurso de Especialização em Automação IndustrialUTFPR, 2016-10-05)
The large-scale production has forced the industry to look for machinery and high equipment quality and high productivity. In this quest are always present servomotors, are to act directly on production lines, CNC milling ...
Revisão de métodos de correção de fator de potência e projeto de um conversor boost PFC
(Universidade Tecnológica Federal do ParanáCampo MouraoBrasilDepartamento Acadêmico de EletrônicaEngenharia EletrônicaUTFPR, 2021-11-23)
Improving the conscious use of energy and its efficiency, the work proposes a resolution of how powers are dissipated in loads in alternating current and how the power factor can be applied to increase the efficiency of a ...
Inhibition of motor cortex excitability with 15 Hz transcranial alternating current stimulation (tACS)
(ELSEVIER IRELAND LTD, 2010)
There remains a lack of solid evidence showing whether transcranial stimulation with weak alternating current (transcranial alternating current stimulation, tACS) can in fact induce significant neurophysiological effects. ...
Estudo da inserção da mini e microgeração na projeção de mercado do sistema elétrico de distribuição
(Universidade Tecnológica Federal do ParanáCuritibaBrasilEspecialização em Energias RenováveisUTFPR, 2017-08-29)
With the privatization of the companies in the sector in the 1990s by the government, there was an increase in competition in the electric power market, making it necessary to create the National Electric Energy Agency ...
Electricity sector in the Galapagos Islands: Current status, renewable sources, and hybrid power generation system proposal
(2019-07-01)
The electricity sector in the Galapagos Islands is heavily dependent on fossil fuels for electricity generation but only a few renewable sources are used for such a purpose in this archipelago. Therefore, this work aims ...
Conversor de alto desempenho e elevado ganho de tensão aplicado a sistemas fotovoltaicos descentralizados
(Universidade Tecnológica Federal do ParanáPato Branco, 2011-11-24)
Because we are going through a period of growing global energy demand, electricity plays a key role in the energy matrix, because it is a very flexible form of energy as its shape, transport and intensity, can be converted ...
Dispositivo de teste de baterias chumbo ácidas
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Elétrica e Informática IndustrialUTFPR, 2019-12-11)
This paper deals with the internal resistance measurement methodologies of lead acid batteries, aiming to identify which method is most effective in daily use in preventive maintenance of battery banks. The theory of battery ...