基于电流前馈控制的单周期Boost APFC

One cycle control has the advantages of good robustness and simple structure, so it has been widely used in power factor correction. The structure has good ability to resist input voltage disturbance, but the dynamic response of load is relatively slow. Therefore, the load current feed-forward control is adopted to improve the transient response of the Boost APFC with one cycle control. However, the introduction of load current feed-forward will increase the two ripple of converter, increase the current distortion of the circuit, and reduce the power factor of the circuit. Therefore, the load current feedforward with two times output voltage frequency notch filter is adopted in this paper, and the influence of different quality factor on modulation voltage is analyzed. Finally, the simulation and simulation results show that the proposed method can significantly improve the dynamic response of the load without adding two ripple.