Electric Driving
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Heat pump for thermal power production in dairy farm
ABSTRACT Besides cold for milk cooling, dairy facilities need to produce hot water for cleaning of tools and equipment. Overall, ohmic heating has been used in dairy farms, increasing power consumption and manufacturing costs. Therefore, as an alternative to reduce power consumption, this paper proposed a water-water heat pumping for simultaneous cold and he
Eng. Agríc.. Publicado em: 2016-10
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2. Acionamento por motor elétrico de rotor apoiado por mancal magnético com controle uniaxial. / Driving electric motor using rotor with 1-DOF magnetic bearing.
A Escola Politécnica da Universidade de São Paulo (EPUSP) e o Instituto Dante Pazzanese de Cardiologia (IDPC) estão realizando um projeto conjunto visando o desenvolvimento de um implante Dispositivo de Assistência Ventricular (DAV). Esta dissertação é parte do desenvolvimento de um VAD implantável em que o rotor da bomba é suspenso por uma suspens�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
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3. Sistemas eletrônicos em duas dimensões : desordem e resposta dinâmica
In disordered systems the pinning strength on the carriers due to impurities or defects is one of the most important mechanisms that produce insulator behavior. A transition to a metal phase should occur if a driving field is applied to the system. In the last three decades, such transition in two-dimensional systems has attracted much attention in light of
Publicado em: 2009
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4. Integração dos processos de eletrodiálise e de degradação fotoquímica para o tratamento de efluentes salinos contendo fenol. / Integration of electrodialysis and photochemical degradation process for the treatment of a saline wastewater containing phenol.
Chemical oxidation processes can be used to treat industrial wastewater containing non-biodegradable organic compounds. However, the presence of dissolved salts may inhibit or retard the treatment process. In this work, a coupled process is studied including a desalination step by electrodialysis (ED) associated with an advanced oxidation process (photo-Fent
Publicado em: 2009
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5. Controle do fluxo de potencia do gerador de indução duplamente alimentado funcionando na velocidade subsincrona / Power flux control of doubly fed induction generator operating at sub-synchronous speeds
Esta tese trata da implementação do controle do fluxo de potência de um gerador de indução duplamente alimentado conectado ao barramento infinito. A orientação de fluxo do estator é utilizada, pois permite o controle, de forma independente, das potências ativa e reativa do estator, por meio das componentes de eixo direto e em quadratura da corrente
Publicado em: 2008
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6. Algoritmo preditivo baseado em modelo aplicado ao controle de velocidade do motor de indução / Speed control of induction motor using predictive algorithm
This thesis presents the results concerning the control of rotor flux and speed of the induction motor using MBPC strategy, which is based on the error minimization between the future set point and model prediction, resulting in control signals. In the case studied in this thesis the motor model is described in space-state. The non linear MBPC emploies searc
Publicado em: 2007
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7. Algoritmo preditivo baseado em modelo aplicado ao controle de velocidade do motor de indução / Speed control of induction motor using predictive algorithm
Esta tese trata do emprego do controle preditivo baseado no modelo (MBPC-Model Based Predictive Control) no acionamento do motor de indução do trifásico, para controle de fluxo de rotor e velocidade. A estratégia MBPC baseia-se na minimização do erro entre as referências futuras e a predição do modelo, para gerar os sinais de controle. Nesta tese, o
Publicado em: 2007
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8. Cost and energy evaluations in grain elevator units / Avaliação energética e de custo em unidades armazenadoras
The agroindustry sector has an important role in Brazilian economy. In 2004, the exports of the agrobusiness corresponded to 40.4% of the total Brazilian export, as totaling US$ 96.475 billion. The lack of investments in the energy sector, that caused electric power rationing for a period of one year from June 2001, associated to the seasonableness of the re
Publicado em: 2006
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9. Study of speed estimation of induction motor without state observer and Kalman filter / Estudo de estimadores de velocidade de motor de indução com observadores de estado e filtro de Kalman
This works presents through of the simulation a comparative study of the sensorless of speed estimation of induction three-phase motor using state observer and Kalman filter. A comparative analysis of the performance of the deterministic and stochastic estimation strategies using adaptive observers and estimators based on extended Kalman filter was realized.
Publicado em: 2006
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10. Controle de vibração torcional em sistemas rotativos usando redes neurais multicamadas / Torsional vibration control in rotating systems using muitilayer neural networks
The purpose of this work is the development of control strategies of torsional vibration in rotating systems, with the objective of minimizing the significant modes of torsional vibration in steadystate. The active control was employed through a multilayer neural network controler, using back-propagation, feeding the system with the same driving electric mot
Publicado em: 1998
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11. Model of P- and T-electroreceptors of weakly electric fish.
To clarify the microscopic mechanisms by which P- and T-receptors encode amplitude modulation and zero crossing time of jamming signals, we present a model of P- and T-receptors based on their physiological and anatomical properties. The model consists of a receptor cell, supporting cells, and an afferent nerve fiber. The basal membrane of the receptor cell
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12. Effect of denervation on a steady electric current generated at the end-plate region of rat skeletal muscle.
An electric current flows continuously out of the synaptic region of rat lumbrical muscle fibres. It is generated apparently as a result of a non-uniform Cl- conductance (GCl), with GCl being lowest at the end-plate. We investigated the effects of denervation on this current. The current persisted with little change after denervation. This was somewhat unexp