Three-phase single stage AC-DC Buck-Boost converter operating in Buck and Boost modes

This paper presents a single stage three phase Buck-Boost AC-DC converter operating in continuous conduction mode (CCM). The converter operates with high power factor in wide input voltage range (60 - 140 V
_RMS
line-to-neutral). It has three operations modes: Buck, Boost and a combination of both, named Buck+Boost. The original topology, operation stages, mains waveforms and equations for Buck and Boost modes are presented. Simulation results for a 1.5 kW, 150 V output voltage converter are also show.