中文摘要：

针对现有模拟控制技术实现功率因数校正（PFC）时,存在功率因数、效率过低,总谐波畸变率（THD）过大,系统不稳定等问题,设计了一种新型高功率因数电源和改进型算法.该电源在现有模拟电路的基础上进行创新,采用DSP数字双闭环控制,通过对改进型算法的分析,得出电压环、电流环控制系统的传递函数,设计并实现了交错并联Boost PFC新型电源.经过大量实验和测试可知,该电源的功率因数达到0.99以上,效率在0.95以上,THD小于3％,提升了系统的稳定性.实验和测试结果完全验证了新型电源的可行性和正确性,拥有广阔的应用前景.

英文摘要：

Nowadays,the process of power factor correction （PFC） in simulation control technology has some problems,such as low power factor,low efficiency,high total harmonic distortion（THD） and system instability.This paper proposes a new type of power source,which has high power factor and an improvement algorithm.The power of innovation adopts DSP digital double closed loop controlling method based on the existed analog circuits.The voltage loop transfer function and current loop transfer function of control system are obtained through the analysis of the improvement algorithm.The new type of staggered parallel boost PFC power source is designed according to the above analysis.The systemic test and contrast experiment results show that the power factor of new power is above 0.99,efficiency is above 0.95,and THD is less than 3％,which improves the stability of the system.Experiment and test results completely verify the correctness and feasibility of the new power source,it has a wide application prospect in the power supply.