一种新颖的功率因数校正控制技术研究  

Research on A Novel Power Factor Correction Circuit

作　　者：杨益平[1] 应建平[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《电力电子技术》2005年第1期35-36,共2页Power Electronics

摘　　要：介绍了一种固定关断时间控制的功率因数校正电路,其主要特点是通过外部简单电路来控制开关管,使其关断时间恒定,且使峰值电流跟踪正弦基准,从而使功率因数校正电路在大电流下工作在电流连续模式(CCM),而在小电流下工作在电流断续模式(DCM)。与传统的临界连续的功率因数校正电路相比,采用该控制方法的功率因数校正电路不但能输出更大的功率,而且有更高的效率。实验表明,采用这种固定关断时间的控制方法,功率因数校正(PFC)的输入电流可满足IEC1000-3-2ClassD的要求。This paper introduces a fixed off-time controlled Power Factor Correction (PFC) circuit. It has some traits: the off-time of the switch is controlled through a simple external circuit to achieve the fixed off-time and and to make the peak current following sinusoidal reference,so PFC converter works on Continuous Current Mode (CCM) at heavy load and Discontinuous Current Mode (DCM) at light load.This PFC converter can output more power with higher efficiency compared with the conventional DCM boundary PFC circuit.Experiment results show that the off-time is fixed and it meets the standard IEC1000-3-2 Class D.

关 键 词：功率因数 校正 控制 固定关断时间 

分 类 号：TM714.1[电气工程—电力系统及自动化]