一种有源功率因数校正电路及控制方法的设计

Design a new type of active power factor correction circuit and control methods

从开关变换器的基本拓扑结构出发,寻找简单和方便的控制方式。根据正向输出的Buck-Boost变换器工作的基本原理,提出了一种新的功率因数校正电路结构,给出了相应的控制方法,并对其进行了仿真。该电路能够利用电压跟随的方式实现PFC。由于该电路能够实现降压输出,因此降低了对所有功率开关管的耐压要求,有利于提高变换器的转换效率并降低成本。

From the basic topological structure of the switch converter, this article looks for an simple and convenient way of control. According to the basic principle of the positive output Buck-Boost converter, this paper proposes a new power factor correction circuit structure, the corresponding control method, and its simulation. This circuit can realize PFC by using the mode of voltage followed. Because the circuit can realize step-down output, it reduces the pressure requirements of all power switch tubes, the transformation of the converter is helpful to improve the efficiency and reduce cost.