【摘要】 数字控制逐渐和电力电子应用紧密结合,功率因数校正是电子技术的一个重要应用.在高压大功率的应用场合,为了减少电磁干扰和提高系统的效率,研究了数字控制的有源功率因数校正(ActivePower Factor Correction,APFC)的基本原理及实现方法,详细分析了在连续调制模式下的升压型有源功率因数校正技术整体控制方案.为了验证该方案的正确性,本文搭建了一台试验样机,实验证明了该功率因数校正电路可以稳定地将功率因数提高到0.99以上,并将总谐波畸变率降至5%以下,在结果中给出了实验的输入端波形.更多还原

【Abstract】 The link between power electronics and digital control gets closer,and PFC rectifier is an important application of power electronics.For high power and high voltage application,in order to reduce EMI(Electro Magnetic Interference) and improve converter efficiency,the principle and performance of digital control APFC(active power factor correction) is studied in the paper,and analysed the active power factor correct control methods at continuous modulate mode. The experiment result of APFC shows that power factor will rise to 0.99 steadyly with this method and the THD(total harmonic distortion) will decrease to 5%.The waveform is given at the end of this paper.更多还原