电流相位补偿解决单相PFC中的过零畸变  

Current Phase Compensation Resolving Zero-crossing Distortion in Single-phase PFC Converter

作　　者：王少永[1] 张方华[1] 

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《电力电子技术》2009年第11期14-15,49,共3页Power Electronics

摘　　要：有源功率因数校正(Active Power Factor Correction,简称APFC)是提高功率因数的常用技术,但其输入电流在输入电压过零附近存在畸变问题,在中频360～800Hz的应用场合,过零畸变尤其明显。输入电流过零畸变的主要原因是输入电流相位超前。通过求解PFC变换器的导纳函数,指出输入电流相位超前的原因。在此基础上,通过电流超前相位补偿的方法,消除导纳函数中造成电流相位超前的部分,解决了因电流相位超前引起的过零畸变。The active power factor correction（APFC）is a very common technology for a high power factor.But there are in-put current distortions in the vicinity of input voltage zero-crossing of single-phase power factor correction （PFC）converter. Zero-crossing distortion appears significantly in the input current at medium input frequencies 360 ～800 Hz.The major cause of zero-crossing distortion is the phase leading of the input current.The admittance function based on modelling con-verter is given and the cause of the phase leading is found.By compensating the lead phase,the phase lead of the input current is eliminated and the zero-crossing distortion caused by the current phase leading is canceled.

关 键 词：功率因数 校正/超前相位补偿 过零畸变 

分 类 号：TM714.1[电气工程—电力系统及自动化]