Research on Three-Phase Partial Active Power Factor Correction

摘要

Higher power inverter-fed air-conditioners are powered by three-phase AC power supply with wide applications, bringing about the power factor correction (PFC) of three-phase rectifier. On the basis of brief analysis of three-phase one-switch partial active PFC, two three-phase partial active PFC's are presented respectively for three-phase three-wire system and three-phase four-wire system, which is a hybrid PFC, incorporating active PFC and passive PFC techniques. After the short description of working principle and simulation analysis, the experiments are carried out. The obtained 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 under any load, and the power factor is higher up to 0.98 under above medium load.