Permanent Magnet
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Methodology to Generate a Reluctance Network Applied to Permanent Magnet Synchronous Generators
Abstract This paper presents a methodology for the generation of a static reluctance network, with magnetomotive sources only in the rotor, applied in the analysis and design of surface mounted permanent magnet synchronous generators. In the analysis stage, this network can provide the magnetic flux in several points of the generator, enabling an estimate of
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. On-load Back-EMF Optimization Based on the Back-EMF MST Method and Parametric Optimization
Abstract This paper proposes an optimal design for a surface mounted permanent magnet synchronous machine (SM-PMSM) based on parametric optimization process to reduce the on-load Back-EMF distortions caused by an increase in the electromagnetic load and in the saturation. Unlike conventional methods described in the literature, the optimization approach prop
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
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3. Magnetic topology with axial flux concentration: a technique to improve permanent-magnet motor performance
Abstract This article presents a different topology for the magnetic circuit of permanent-magnet motors, using the concept of Axial Flux Concentration. By means of longitudinal extension of the rotor length beyond the stator core, a substantial increase in the flux per pole is enabled, improving the general performance of the machine. Even in low cost motors
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-12
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4. Green Energy Generation Using FLC Based WECS With Lithium Ion Polymer Batteries
ABSTRACT Green Energy Generation Using Wind energy conversion system is achieved using Lithium Ion Polymer Batteries and Fuzzy logic controller. Presented scheme also provides the constant output power for the stand alone loads like Island, Hills Stations, Ships and Remote locations etc. A fuzzy-logic controller based Wind energy conversion system with perma
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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5. Design and Damping Analysis of a New Eddy Current Damper for Aerospace Applications
Abstract In order to reduce the structural vibrations of a mechanical system used in aerospace, a new sketch of eddy current damper (ECD), consisting of one cylindrical permanent magnet, two ring-shape copper plates, one axial transmission shaft and electromagnetic shield, is proposed. Three dimensional (3D) electromagnetic transient analysis on damping perf
Lat. Am. j. solids struct.. Publicado em: 2016-11
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6. Recovery Process Development for the Rare Earths from Permanent Magnet Scraps Leach Liquors
The current study deals with the recovery process development for the rare earths (REs), i.e., dysprosium (Dy) and neodymium (Nd), metals from permanent magnet scraps leach liquors. Its main objective is the recovery of the rare earths (Dy and Nd) from permanent magnet scraps (PMSs). Introdutory experiments were carried out to get leach liquor solution: oxid
J. Braz. Chem. Soc.. Publicado em: 2015-06
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7. Study on radial suspension forces of bearingless permanent magnet slice motor based on accurate inductance model
An accurate mathematical model of radial suspension forces for a bearingless permanent magnet slice motor (BPMSM) is of great significance to levitate the rotor stably and to improve the control accuracy of radial suspension force. In this paper, after a brief introduction on the suspension principle of the BPMSM, the accurate inductance model of two sets of
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12
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8. Optimal design of a set of permanent magnet generators with the same cross-section
The optimal design of a set of two permanent magnet generators that share the same cross section to reduce the manufacturing cost is presented using a gradient optimization algorithm. The optimization tool is used to define the optimal number of pole pairs of the set of machines and the optimal permanent magnets width respecting the geometrical and performan
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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9. Desenvolvimento de imunossensores piezelétrico e eletroquímico para detecção de amostras de interesse agronômico e de saúde / Desenvolvimento de imunossensores piezelétrico e eletroquímico para detecção de amostras de interesse agronômico e de saúde / Development of piezoelectric and electrochemical immunosensors to detect samples of agronomic interest and public health / Development of piezoelectric and electrochemical immunosensors to detect samples of agronomic interest and public health
This work shows development of immunosensors for agronomic interest and public heath. The first was a piezoeletric immunosensor to detect a cysteine peptidase, a potencial biomarker for Xanthomonas citri subsp. citri that cause a citrus Canker. Another was electrochemical immunosensor based on gold nanoparticles as a label and magnetic beads as capture phase
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/07/2012
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10. Estudo de técnica de determinação de posição inicial de rotor em máquinas síncronas de ímã permanente com controle sensorless / Technical study for determination of initial rotor position of permanent magnet synchronous machines with sensorless control
Este trabalho tem por objetivo estudar e avaliar uma técnica de determinação de posição inicial de rotor em máquinas síncronas de ímã permanente de superfície. A técnica de determinação de posição inicial é baseada na aplicação de pulsos ao motor. É proposto também um algoritmo de ajuste automático desses pulsos de forma a criar um mecan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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11. MODEL REFERENCE ADPATIVE CONTROL APPLIED TO THE SPEED AND POSITION CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTORS / CONTROLE ADAPTATIVO ROBUSTO POR MODELO DE REFERÊNCIA APLICADO AO CONTROLE DE VELOCIDADE E DE POSIÇÃO DE MOTORES SÍNCRONOS A ÍMÃS PERMANENTES
Este trabalho propõe duas estratégias de controle vetorial para motores síncronos a ímãs permanentes (MSIPs). Destinam-se ao controle de velocidade e de posição, respectivamente, e são baseados em uma lei de controle chamada VS-RMRAC. Não tendo sido aplicado ainda ao controle de máquinas elétricas, a lei de controle VS-RMRAC apresenta característ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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12. Structural and photocatalytic characterization of BaFe2O4 obtained at low temperatures
Barium monoferrite BaFe2O4 classified as permanent magnet stands out among other ceramic magnets due to its high chemical stability, corrosion resistance and low production cost. In addition, experiments conducted on photocatalytic degradation of methyl orange and UV transmittance by spectrophotometry have shown that this material has photocatalytic properti
Materials Research. Publicado em: 14/10/2011