三相三开关部分有源功率因数校正电路的研究

Research on Three-Phase Partial Active Power Factor Correction

三相交流电源供电的较大功率变频空调日益得到广泛应用,带来了三相整流器的功率校F问题。在简要分析三相单开关部分有源PFC的基础上,根据三相三线制、三相四线制供电方式的不同,提出了两种结合有源PFC技术和无源PFC技术的Buck型混合三相有源部分PFC方案,在对其工作原理进行简要分析和仿真分析的基础上,进行了实验研究,所得结果验证了所提出的三相部分PFC具有电压与电流应力小、效率高、功率因数高、直流平均电压较高的特点,各种负载下交流输入侧的各次谐波电流均满足IEC61000-3-2标准,中等负载以上时输入功率因数高达0.98。

Higher power inverter-fed air-conditioner 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.