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随着各种类型的AC－DC功率变换器的广泛应用，所产生的网侧功率因数较低（0．6左右），谐波污染严重等问题也充分暴露出来为此，结合PFC电路的特点，文中给出一种借鉴移相较开关技术的新型PFC电路．通过对该PFC电路工作原理和电路工作过程的分析，可以看出该PFC电路可同时实现功率因数校正和进行AC－DC功率变换，是一种具有工程应用价值的单级、隔离式、软开关PFC电路，可在电镀、电解、通信等领域中获得广泛应用
With the wide application of various types of AC-DC power converters, the problems such as low power factor (about 0.6) and severe harmonic pollution generated on the network side are fully exposed. Therefore, combining the characteristics of the PFC circuit In this paper, a new type of PFC circuit based on shift-switch technology is given. By analyzing the working principle of the PFC circuit and the working process of the circuit, it can be seen that the PFC circuit can realize the power factor correction and the AC-DC power conversion at the same time, which is a single-stage, isolated and soft switch with engineering application value PFC circuit, can be widely used in electroplating, electrolysis, communications and other fields