High Efficiency Motors
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Proposta de um método de aprimoramento do processo de montagem utilizando a metodologia soda e ahp com rating / Proposal for an improvement method for assembly process using the soda methodology and ahp with rating
Technological developments, the quality demanded by the customer and increased competition are some of the variables that pressure companies to reassess their processes, involving the manufacture in search of productivity, competitiveness and profitability. In a context of increasing global competition and high dynamics, the trend is that manufacturing firms
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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2. Estratégia para estimação do conjugado eletromagnético de motores de indução / STRATEGY FOR THE ESTIMATION OF TORQUE ELECTROMAGNETIC INDUCTION MOTORS
The purpose of this work is to develop a strategy for determining the electromagnetic torque of induction motors (MIT) from the stator flux estimation, which presents higher robustness against parametric variations. The stator flux is estimated by integrating the voltage model of the machine, applying Highpass Filters (HFP) for ideal integration of electromo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/05/2011
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3. An analysis of the energy efficiency of piston compressors in compressed air systems / Análise da eficiência energética em compressores a pistão em sistemas de ar comprimido
Este estudo analisa a eficiência energética de compressores a pistão e seu consumo de energia elétrica utilizando motores-padrão e de alto rendimento acionados por partida direta e com softstarter. A influência de vazamentos sobre a eficiência energética foi também analisada, assim como os valores de corrente, potência, fator de potência e taxas d
Publicado em: 2009
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4. Acionamento vetorial de motores de indução trifásicos com enfraque-cimento de campo e maximização do conjugado por ampère
This work investigates the operation of three phase induction motors in field weakening and high speed regions. Maximum torque per ampère is imposed by using an indirect vector control strategy. Mathematical models that accounts for magnetic saturation is used for simulations and adjustment of controllers used in control algorithm. The driving structure is
Publicado em: 2008
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5. Classification method of elements that cause the run-up period in changeover / Metodo de classificação dos elementos do periodo da retomada de produção
The setup time reduction methodologies gained importance when the industry was challenged to produce in small lots and high variety with the same production system. In the historical context, SMED methodology, elaborated by Shigeo Shingo, a Toyota Motors Company consultant, deserves special attention. His methodology has given prominent steps in terms of eva
Publicado em: 2007
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6. Action of conservation of energy applied to one plants composed industrial of induction motors / Ações de conservação de energia aplicadas a uma planta industrial composta de motores de indução
The objective of the present research, from a data set of electric motor collected in a regimen of work, give its contribution to the study on industrial electrical motors energy saving. It present the three-phase induction motor, the various issues of its industrial use and the electric parameter set collected are then presented. Field of work was elabora
Publicado em: 2006
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7. The effect of the carbon content on the grain size coarsening and on the magnetic properties of the semi processed electrical steels after the final annealing. / O efeito do carbono no aumento do tamanho de grão e nas propriedades magnéticas de aços elétricos semiprocessados após o recozimento final.
Annealing applied by the motors plants that are made on the semi processed electrical steels without an exact and precisious control of the decarburization on the lamination can brings undesirable results on the grain size coarsening and as a result an increasing on the core losses with a significant depreciation on the efficiency of the electrical motors. M
Publicado em: 2006
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8. ANÁLISE COMPARATIVA DE INVERSORES MULTINÍVEIS COM CÉLULAS H-BRIDGE CONECTADAS EM SÉRIE / COMPARISON ANALYSIS OF CASCADED MULTILEVEL INVERTERS
This Master Thesis presents a methodology to compare different topologies and configurations of multilevel systems applied to drive medium voltage induction motors. Initially, it presents the input and output parameters that must be supplied by the power drivesystems manufacturer. Then, the mathematical models of the performance indexes used are presented, b
Publicado em: 2006
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9. Contribuição para o projeto basico de uma celula de combustivel de eletrolito polimerico
One of the most significant recent developments in energy systems is in the area from the fuel ceils. These devices that generate electric energy combining hydrogen (or hydrocarbons) with the oxygen of the air as fortresses vectors of scientific-technological development, that aim in the sense of replace the motors to the internal combustion in the area of t
Publicado em: 2002
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10. Controle em modos deslizantes do servomotor C.A.
This work presents a study about non-continuous sliding modes control applied to Permanent Magnetic AC motor (PMAC), also called AC Servomotor. The two main objectives of this work are: to analise the robustness of the technique related to load disturbance and variations in the windings resistance; and to study alternative ways to reduce chattering. The firs
Publicado em: 2001
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11. Chemical peristalsis
Molecules that emulate in part the remarkable capabilities of protein motors were recently chemically synthesized. A promising approach is based on physically interlocked macromolecular complexes such as rotaxanes and catenanes. Using the latter, Leigh et al. [Leigh, D. A., Wong, J. K. Y., Dehez, F. & Zerbetto, F. (2003) Nature 424, 174–179] constructed a
National Academy of Sciences.
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12. Chemotactic signaling by the P1 phosphorylation domain liberated from the CheA histidine kinase of Escherichia coli.
CheA is a histidine kinase central to the signal transduction pathway for chemotaxis in Escherichia coli. CheA autophosphorylates at His-48, with ATP as the phosphodonor, and then donates its phosphoryl groups to two aspartate autokinases, CheY and CheB. Phospho-CheY controls the flagellar motors, whereas phospho-CheB participates in sensory adaptation. Poly