This paper proposes an architecture of digital current regulator intended to be used to control the power supplies of the new Brazilian synchrotron light source, called Sirius. It is based on a high-precision Digital to Analog Converter and a modern System on Chip device, which has the capability of performing realtime control tasks together with managing and interface tasks. Despite this system will be used to control many kinds of power supplies, it was validated in a 100 W power supply, which was previously developed to be used in the present Synchrotron Light Source.
Este trabalho apresenta a modelagem de fontes modulares de corrente, associadas em série/paralelo, utilizadas no Sirius. O modelo proposto ée baseado na teoria de sistemas descritores, e considera a associação de N módulos sperie-paralelo. O modelo matemáatico e o circuito chaveado equivalente são implementados, respectivamente, nos softwares Matlab ePSIM. Os resultados obtidos são satisfatórios em relação a precisão do modelo.
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