矢量模式单周期控制三相有源功率因数校正技术的研究

Study of the Three-Phase APFC Circuit Based on Vector Mode One-Cycle Control

提出了三相有源功率因数校正变换器矢量模式单周期控制策略,将三相交流电压划分为6个区间,同一时间内只有两个开关运行在高频状态,降低了电路的开关损耗,推导建立了CCM模式下三相PFC电路的数学模型和核心控制方程,并使用Matlab/Simulink对控制电路进行建模和仿真实验研究。仿真结果表明,输入电流能快速跟踪输入电压,输出电压基本保持恒定,实现了三相功率因数校正的目的,具有良好的动、静态性能,验证了所提控制策略的正确性和可行性。

A vector mode one-cycle control strategy of three-phase active power factor correction converter is proposed. The AC voltage of three-phase busbar is divided into six regions. Only two switches are running in the state of high frequency in the same time, which could reduce the switching loss. The mathematical model and core control equation of three-phase PFC is derived and established in the current continuous mode. Matlab/Simulink is used to carry out modeling and simulation experiments for the circuit. The results show that it can make the phase of input current track the phase of input voltage, the output voltage maintains a constant, and three-phase PFC is realized. The dynamic and steady state performances of the circuit are satisfied. It verifies the correctness and feasibility of the proposed control strategy.