Magnetic Induction
Mostrando 13-24 de 97 artigos, teses e dissertações.
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13. Finite element analysis of hybrid excitation axial flux machine for electric cars
This paper presents a FEM analysis of a hybrid excitation brushless axial flux machine (HEBAFM) for traction electric vehicle purposes in order to compare with the results from an analytical method used to determine the flux densities in each part of the machine. The magnetic quantities of the proposed topology were investigated in order to obtain a satisfac
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12
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14. Anomalous loss hysteresis loop
This paper discusses the anomalous loss behavior in two electrical steels types. Starting from a non oriented electrical steel coil, three groups of samples with different grain sizes were produced. Grain oriented steel samples were produced from a commercially available material. The experimental procedure was performed by means of magnetic properties measu
Mat. Res.. Publicado em: 28/02/2014
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15. Detection of acute cerebral hemorrhage in rabbits by magnetic induction
Acute cerebral hemorrhage (ACH) is an important clinical problem that is often monitored and studied with expensive devices such as computed tomography, magnetic resonance imaging, and positron emission tomography. These devices are not readily available in economically underdeveloped regions of the world, emergency departments, and emergency zones. We have
Braz J Med Biol Res. Publicado em: 2014-02
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16. Study of aluminum nitride precipitation in Fe- 3%Si steel
For good performance of electrical steels it is necessary a high magnetic induction and a low power loss when submitted to cyclic magnetization. A fine dispersion of precipitates is a key requirement in the manufacturing process of Fe- 3%Si grain oriented electrical steel. In the production of high permeability grain oriented steel precipitate particles of c
Mat. Res.. Publicado em: 11/06/2013
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17. An analysis on electric and magnetic behaviour on an induction planar actuator
The induction planar actuator, i.e. IPA, proposed in this study presents an electromagnetic structure formed by a static ferromagnetic core with an aluminium plate that corresponds to the secondary, and a mover, also called primary. The latter comprehends two three-phase windings, mounted in an armature core, which are orthogonal to each other. When they are
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-06
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18. Detection and analysis of rotor faults in induction motors by the measurement of the stray magnetic flux
This paper presents measured data and electromagnetic FEM field calculations as techniques for detecting and analyzing eccentricity in three-phase induction motors. Also it presents experimental results for detecting broken bars in induction motor rotors. A search-coil is used as magnetic field sensor to measure the stray magnetic flux outside the motor. It
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2012-06
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19. Desenvolvimento de sistema eletrônico para tomografia de indução magnética / Electronic system development for magnetic induction tomography
Magnetic induction tomography is a contactless conductivity imaging technique. This technique uses a magnetic field generator (usually a coil) to induce Eddy currents in the target object and several magnetic sensors (usually coils as well) that capture the magnetic field generated by these induced currents. The measurements obtained by these sensors can be
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
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20. Análise computacional da distribuição de campos e correntes e reconstrução de imagem em um sistema de tomografia de indução magnética / Computational analysis of current and field distribution and image reconstruction in a magnetic induction tomography system
A Tomografia de Indução Magnética é uma técnica em desenvolvimento para a visualização das propriedades eletromagnéticas de um objeto. Difere de outras técnicas de produção de imagens a partir de sinais eletromagnéticos por se tratar de um método não invasivo e sem contato cuja sua finalidade principal é a obtenção da distribuição de condu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2011
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21. Caracterização de rejeitos de minério de ferro para uso em pavimentação / Characterization of iron ore tailings for use in paving
In this work it was carried out a series of laboratory tests towards chemical, mineralogical and geotechnical characterization of rejects from iron ore processing, for use in paving. Material sampling was done in specific points as they were generated during the beneficiation process along the cycle, in order to preserve their properties. The alternative app
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
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22. Effect of the low temperature annealing on primary and secondary structures and magnetic properties of Fe-3% Si
The processing of 3% Si steel is characterized by the use of MnS particles as a normal grain growth inhibitor. Experiments were carried out to investigate the grain growth in this material during heat treatments at low temperature. Industrial decarburized samples were annealed in the range 825-845 °C and a detailed study of grain size and texture was made b
Materials Research. Publicado em: 22/12/2011
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23. Simplified Mathematical Modeling for an Electromagnetic Forming System with Flat Spiral Coil as Actuator
This study presents mathematical modeling and calculation procedure for problems of electromagnetic forming of thin circular metal sheets using a flat spiral coil as actuator. The methodbased on the Biot-Savart Law focuses specifically on the calculation of the electromagnetic field generated by the flat coil and analysis of the circuit that models the elect
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
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24. SÍNTESE E CARACTERIZAÇÃO DE NiFe2O4 E EFEITOS DA DOPAGEM NA MAGNETIZAÇÃO DE SATURAÇÃO. / SYNTHESIS AND CHARACTERIZATION OF NiFe2O4 AND EFFECTS OF DOPING IN MAGNETIC SATURATION.
The ferrites are a wide class of ferrimagnetic materials with great technological importance and are studied extensively for many decades. Their remarkable magnetic characteristics make it an element often used in induction transformers by his high magnetic permeability, high values of saturation magnetization and low coercivity, resulting in smaller losses
Publicado em: 2011