Performances of the eight-switch versus interleaved eight-switch three-phase buck-type PFC rectifiers

One major research topic in the PFC rectifiers area is represented by efficiency improving methods, while maintaining the unity power factor. The investigated topologies in this paper are the single stage versus interleaved eight-switch rectifiers topologies with or without considering the DC-link diodes. For the eight-switch rectifier a new control strategy is proposed in [8]. The proposed interleaved switching strategy enables cancellation of the AC-side input current harmonics and reduction of DC-side voltage ripple. Performances of the four PFC rectifiers are evaluated based on simulation studies in GECKO environment. Efficiency evaluation for various power ranges is also provided. Higher power efficiency for the interleaved topologies is proved, particularly for the interleaved eight-switch PFC topology which takes into account of the DC-link diodes.