An improved circuit configuration of three-phase PFC converter

The discontinuous current mode control scheme for AC/DC converters with active power filtering function and power factor correction scheme has seen widespread use for single phase input power conversion supplies, because this control implementation has practical advantages of simple control system configuration and cost-effectiveness. But this control scheme has not been for three phase input power conversion supplies because the three-phase PFC converter characteristics of conventional control scheme for three phase BC mains have significant disadvantages. In order to improve the disadvantages, a new PFC converter circuit configuration with discontinuous current mode control scheme suitable for three phase AC mains is proposed by the authors. This paper presents an operating principle and unique features of the proposed three phase active PFC converter topology and its control strategy on the basis of simulation results. In addition the harmonic analysis of the utility-grid side current of the proposed three-phase PFC converter is carried out as compared with the conventional ones.