双环控制策略的有源功率因数校正电源研究

Research on Dual-loop Control Strategy for Active Power Factor Correction Power Supply

基于电流和电压的双环控制策略,研制了一台输出功率300W的功率因数校正电源样机。功率因数校正级和DC-DC变换级分别采用平均电流控制和峰值电流控制方法。文中详细讨论了该样机的工作原理和设计过程,给出了电流内环和电压外环补偿网络的设计过程。试验结果表明,所设计的样机控制电路简单,运行可靠,性能基本达到设计指标。

A 300W experimental prototype of power supply with power-factor-correction function based on dual-loop control strategy is presented in this paper. The power-factor-correction circuit and the DC-DC converter are realized by average-current control and peakcurrent control, respeetively. In this paper, the principle,the design process, the compensation network of current-loop and voltage loop of the experimental prototype are discussed in detail. Experimental results verify that the control circuit of the power supply is simple. the operation is reliable and it also meets the performance demands.