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Motores a relutância variável 6x4 e 6x6. Estudo comparativo de operação e desem...
Dias, Renato JaymeThe comparative study of electric machines has been in vogue due to the growing demand for electromechanical converters with maximum possible efficiency. In this scene, the switched reluctance machines have proven to be competitive. Comparative studies between these machines and the already established induction machines can be easily found in the scientific literature, but studies on various configurations of ...
Análise da relação entre parâmetros da onda-M e a dor
Machado, Alessandro Ribeiro de PáduaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior; Pain is a subjective and individual feeling that causes many inconveniences to those who feel. Thus, we need a method to quantify pain objectively. Studies show that evoked potentials can generate responses that reflect the painful processes. In this context, this study used M-wave characteristics as potential markers of pain sensation. Sixteen volunt...
Análise desenvolvimento de um novo conversor CA-CC híbrido monofásico com contr...
Lima, Gustavo Brito deThis work presents the development and the experimental analysis of a new single-phase hybrid rectifier with high power factor (PF) and low harmonic distortion of current (THDI), suitable for high power application. The proposed structure is composed by an ordinary single-phase diode rectifier with parallel connection of a switched converter. It is outlined that the switched converter is capable of composing th...
Modelos de predição linear para análise de sinais eletroencefalográficos (EEG) ...
Ribeiro, Jaqueline AlvesCoordenação de Aperfeiçoamento de Pessoal de Nível Superior; This work establishes models of neurophysiological signals, which are composed of spontaneous activity measurements taken by means of multielectrode arrays (MEAs) applied on in vitro cell cultures; as well as of neurological signals based on electroencephalography. These models suppose that MEAs are employed as neuroprostheses applied for detection an...
Proposta de um esquema para a provisão de QoS no padrão IEEE 802.16
Rosa, Eduardo CastilhoFundação de Amparo a Pesquisa do Estado de Minas Gerais; The IEEE 802.16 standard is designed to provide wireless broadband connectivity for both xed and mobile users in a wide coverage area with high rates of data transfer. The main feature incorporated by the IEEE 802.16 standard is the quality of service (QoS) provisioning by means of packets scheduling, trac policing and connection admission control (CAC). ...
Análise da estacionariedade e gaussianidade da atividade elétrica neural, do ru...
Assis, Aline Rocha deFundação de Amparo a Pesquisa do Estado de Minas Gerais; This work analyzes signals of spontaneous neuronal electrical activity, measured by devices known as Multi-Electrode Arrays (MEA), which are the substrate of neuronal cultures of rat hippocampus. The database under investigation consists of five signals: (i) instrumentation noise, (ii) biological noise, (iii) inactive culture and (iv) two active culture e...
Organização efetiva da manutenção de sistemas elétricos auxiliada por técnicas ...
Almeida Junior, Afonso Bernardino deCoordenação de Aperfeiçoamento de Pessoal de Nível Superior; One of the most significant challenge for any company, whatever its size, is to reduce costs to survive in the current context of globalization. The market is who sets the price of a product, so, the only way to survive and make profits is to reduce costs to the point of getting compensation margins. An efficient maintenance policy, where the main obj...
Um estudo sobre tensões induzidas por descargas atmosféricas em linhas de trans...
Mota, Paulo César ÁlvaresThe study of lightning and the resulting induced voltages is very important in the process of designing of transmission lines. In this work it will be presented problems that can be caused by such phenomenon in electrical systems, as a consequence of these voltages peaks. A analysis of the characterization of atmospheric discharge is performed in order to understand causes of induced overvoltages in transmissio...
Simulador das interferências de campos elétrico e magnético em função da potênc...
Kiszka Júnior, PedroWe have developed and created a simulator for calculations and indicatios of maximum permissible values for the electric and magnetic fields as well as the power density in Rádio Base Station, with the use of CDMA technology, in the range of 800 MHz, being the values allowable were referenced and based on the International Commission on Non-ionizing radiation protection. The simulator developed allows to calcul...
Conversor boost quadrático pwm associado à célula de auxílio à comutação SR-ZVS...
Vilefort, Leandro SousaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior; This work presents a Quadratic Boost PWM converter associated to the auxiliary commutation cell SR-ZVS-QRC. The proposed converter has high voltage gain, low switching losses and reduced electromagnetic interference (EMI), making it suitable for fuel cells (H2) applications. There will be presented operation steps, main waveforms, phase diagram, stati...