中文摘要：

分析研究了一种基于单周期控制的三相三开关功率因数校正（PFC）整流器。针对传统的单周期控制下输入电流平均值畸变问题,提出了一种改进的PWM调制方法,通过改变比较器的调制波信号,消除传统单周期控制方法所带来的输入平均电流中的奇次谐波,详细阐述了其工作原理和控制方法。仿真和实验结果表明,本文所提出的控制方法使得三相输入电流的谐波分量明显降低,功率因数得到显著提高。

英文摘要：

This paper presents the analysis about three-phase power factor correction based on one-cycle control.According to the problem of the average input currents distortion under the traditional one-cycle control,an improved PWM modulation method is introduced based on the analysis. With the proposed method,the odd harmonic in input current is reduced significantly,and the paper expounds its operating principle and control method. The steady-state stability analysis is explained,and the stability condition of the whole system is derived. Furthermore,the theoretical analysis is confirmed by simulation results and experimental investigations.