Programa de Pós-graduação em Engenharia Elétrica e da Computação
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Navegando Programa de Pós-graduação em Engenharia Elétrica e da Computação por Por Orientador "Batista, Adalberto José"
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Item Caracterização e modelagem da histerese e das perdas magnéticas em aços elétricos através do SCaMMa(Universidade Federal de Goiás, 2016-10-26) Pinheiro, Matheus Levi Paranaguá; Batista, Adalberto José; http://lattes.cnpq.br/0622828251913162; Batista, Adalberto José; http://lattes.cnpq.br/0622828251913162; Brito, Leonardo da Cunha; Silva, Wander Gonçalves da; Luciano, Benedito Antonio; Domingos, José LuisInitially in this work, are presented the development and implementation of a new methodology to control the magnetic induction waveform, which was inserted into the automated measurement system for the characterization of soft magnetic materials, called SCaMMa. In the sequence, studies related to the magnetic hysteresis and to the magnetic losses, especially in silicon steels, are presented. The magnetic hysteresis in silicon steels has been analysed through the inverse version of the Jiles–Atherton classical model and through a modified one found in the literature. Concerning the determination of its parameters, the theory and the computational implementation of the heuristic method known as “Shuffled Frog Leaping Algorithm (SFLA)” have been addressed. Within this context, it was possible to investigate two drawbacks of the Jiles–Atherton model: i) the modeling of the so–called inner loops; and ii) the modeling of the minor loops. In the study of the magnetic losses in silicon steels, it was employed in this work the Bertotti´s model, which establishes the total magnetic losses division in three independent components: hysteresis losses, classical losses, and excess losses. It was investigated two versions of this model, so–called B1 and B2, in which the magnetic hysteresis losses are modeled respectively through the Steinmetz´s model and through the theory of two–portion hysteresis losses subdivision: the one so-called high induction hysteresis losses, and the other, low induction hysteresis losses. Due to some failures, a new approach was chosen reviewing two of the model coefficients calculation: the one related to the classic loss, and the other related to the excess loss. After this reviewing, the magnetic loss models could present predictions that are more exact.