电压宽范围输入PFC电路的分析与仿真

研究了一种新颖的适用于电压宽范围输入的功率因数校正电路,并对Buck＋Boost电路的工作原理进行了阐述和分析,提出了改进的适合Buck＋Boost电路的平均电流控制策略.Buck＋Boost电路既有Buck电路的工作特点又有Boost电路的工作特点,具有结构简洁、器件应力低、检测电流方便、效率高等优点.仿真结果验证了控制策略的可行性,表明该电路适用于电压宽范围输入的功率因数校正电路.

Analysis and Simulation of a Correction Circuit for Wide Input Power Factor

In this paper, a new two - switch topology, Buck ＋ Boost, was proposed. A detailed analysis of converter operation and component stresses was given, presenting a new control strategy for average current control, which is an extension of conventional average current control method. There are two independently control switches in wide input power factor correetion（PFC） circuits. The simulation results proved the feasibility of control strategy, and demonstrated that Buck ＋ Boost can be well applied to the wide input power factor correction circuits.