Generated voltage variation and permanent magnet magnetic condition analysis. / Análise da variação da tensão gerada e do estado de magnetização em um gerador com ímãs permanentes.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Aiming to analyze the performance of a permanent magnet generator, operating under variable load and quantifying the corresponding condition of its magnets, we have developed a prototype adaptable to wind generators. As one of the purposes of this work is to study the magnetic performance of the permanent magnets in several points of load, we have chosen ferrite magnets with average remanence (Br) of 0.39 T. Thus, even light variations in load are enough to verify the variation of the generated voltage, which eases the rating of total or partial demagnetization of the installed magnets. Additionally, we study load share of that generator, with rectified output, operating in parallel with D.C. bus or battery bank. An analytic approach of demagnetization of the generators permanent magnets is also presented, as well as an experimental survey of it. A similar procedure is adopted in the study of the load share.

ASSUNTO(S)

reação de armadura gerador elétrico com ímãs permanentes electrical generator permanent magnet operation point máquinas elétricas

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