Research on Three-phase Partial Active Power Factor Correction

Higher power inverter-fed air-conditioner is powered by three-phase AC power supply with wide applications,bringing about the issue of the power factor correction(PFC) for three-phase rectifiers.Two three-phase partial active PFC is presented respectively for three-phase three-wire system and three-phase four-wire system,which incorporate active PFC and passive PFC techniques.Based on the description of working principle,the experiments are carried out,and the results prove the features of three-phase partial PFC of low voltage and current stresses,high efficiency,higher power factor and higher DC average voltage.The harmonics current are consistent with IEC61000-3-2 at any load,and the power factor is higher up to 0.98,and the efficiency is above 0.98 at above medium load.