Overview of Sirius Power Supply System

Sirius is a 4th generation synchrotron light source designed and under construction by Brazilian Syn-chrotron Light Laboratory (LNLS), which first beam is scheduled to operate in 2019. Almost a thousand Pow-er supplies (PS) will be needed to feed all magnets of the magnetic lattice, with outputs ranging from 10A to 1.1kA and 50W to 333kW. Almost all power supplies were designed at LNLS. Only three families of power modules were de-signed: low power (FBP), high power (FAP) and AC (FAC). Each PS can have up to 8 modules in a parallel or/and series association, in order to reach the rated output values. All PS are digitally controlled by the same hardware and firmware, also developed by LNLS, called Digital Regulation System (DRS), but with different parameter settings. The DRS is also responsible by the communi-cation with other systems, PS monitoring, data man-agement, etc. This work presents an overview of this system, showing the PS specifications, family topologies and results of tests.