单周期控制新型并联式三相PFC电路的研究

摘要

针对传统三相PFC电路存在的问题,介绍了一种新型并联式三相PFC电路结构.采用了Scott变压器实现三相交流电转换成两个相位正交的交流输入,分析了单周期控制单相PFC电路原理,推导了CCM模式下单周期控制方程,进行了主电路参数的设计和稳定性分析,使用MATLAB/Simulink对电路进行建模和仿真.仿真结果表明,输入电流跟踪输入电压,实现了三相功率因数校正的目的,输出电压基本保持恒定,动态响应快,验证了所提方法的正确性和可行性.%For the problems existing in the traditional three-phase power factor correction(PFC) circuit,introduction was made to a novel parallel three-phase PFC circuit topology structure.Two-phase orthogonal voltage was produced by means of the Scott transformer from the three-phase input.Analysis was made to one-cycle control single-phase PFC circuit principle.The power factor correction equation was deduced in the current continuous mode.The parameters of the main circuit were designed and the circuit stability was analyzed.MATLAB/Simulink was used to carry out modeling and simulation for the circuit.The results show that it can make the phase of input current track the phase of input voltage,three-phase PFC is realized,and the output voltage maintains a constant with fast dynamic response.It verifies the correctness and feasibility of the proposed circuit.