The design of a cooling system is critical in power converters based on wide-bandgap (WBG) semiconductors. The use of gallium nitride enhancement-mode high-electron-mobility transistors (GaN e-HEMTs) is particularly challenging due to their small size and high power capability. In this paper, we model, study and compare the different heat dissipation systems proposed for high power density GaN-based power converters. Two dissipation systems are analysed in detail: bottom-side dissipation using thermal vias and top-side dissipation using different thermal interface materials. The effectiveness of both dissipation techniques is analysed using MATLAB/Simulink and PLECS. Furthermore, the impact of the dissipation system on the parasitic elements of the converter is studied using advanced design systems (ADS). The experimental results of the GaN-based converters show the effectiveness of the analysed heat dissipation systems and how top-side cooled converters have the lowest parasitic inductance among the studied power converters.
Este artigo é fruto da minha pesquisa de iniciação científica (CNPq), que surgiu de algumas inquietações presentes na minha vida de torcedora palmeirense e estudante, na intersecção entre os campos do feminismo e do esporte. Tendo em vista o crescente número de mulheres nos estádios de futebol nas últimas décadas embora a área de estudos sobre futebol tenha se constituído em torno da temática relativa às torcidas organizadas o enfoque quase sempre privilegiava os agentes masculinos do campo esportivo, relegando a um segundo plano a presença das mulheres, consideradas, no máximo, simples coadjuvantes de uma modalidade praticada exclusivamente por homens. Portanto, o estudo buscou compreender e contemplar a riqueza de um universo ainda pouco valorizado e muito subestimado, analisando as formas de existir e resistir das mulheres em torno do esporte que é símbolo de identidade e paixão nacionais.
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