Este artigo apresenta uma análise matemática referente ao objetivo de completar um álbum de figurinhas. Os resultados apresentados consideram um álbum comercialmente vendido no Brasil no ano de 2018 e buscam elucidar o quão difícil é completar tal álbum. Tais resultados foram obtidos por meio de simulação computacional, de modo que um programa em linguagem Matlab foi desenvolvido para essa tarefa. O fluxograma desse programa é apresentado ao longo do artigo. Ainda, a validade do programa é corroborada pela comparação entre um resultado por meio dele obtido com o resultado obtido por outros autores.
This work presents a design and optimization method of the five-level current source converter magnetics components, this is a contribution of this work, since the magnetics volume information of this topology lacks in the literature. The magnetics components are: the interphase transformers, the input and the output filter inductors. The converter volume is minimized when the magnetic components multi-domain optimization is done. The inductance values are defined with given constraints such as Electromagnetic Compatibility standards for differential mode filters, conduction and switching losses of the semiconductors and maximum current variation. This optimization is shown for two different converter switching frequencies: 45 kHz and 150 kHz. The copper losses, iron losses and temperature rise are calculated and used for selecting the smallest volume of each magnetic component with given specifications. A 6-kW prototype with the optimized magnetics was constructed.
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