三相单级全桥PFC变换器起动与关机磁复位方法研究  

Research on Methods of Starting-up and Stopping Magnetic Reset for a Three-phase Single-stage Full-bridge PFC Converter

作　　者：孟涛[1] 贲洪奇[1] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市150001

出　　处：《中国电机工程学报》2010年第21期13-19,共7页Proceedings of the CSEE

基　　金：台达环境与教育基金会<电力电子科教发展计划>(DREO2006010)~~

摘　　要：研究一种工作于电流断续模式(discontinuous current mode,DCM)、基于电流源型全桥Boost拓扑的三相单级功率因数校正(power factor correction,PFC)变换器的起动及升压电感的关机磁复位方法。利用带中心抽头和反激绕组的电感取代原有的升压电感,提出了一种新颖的可自行起动并实现升压电感关机磁复位的PFC电路结构。该电路在起动和关机过程中工作于反激式(Flyback)模式,利用反激绕组分别实现了输出滤波电容的充电以及升压电感的磁复位。分析了变换器的起动以及升压电感的关机磁复位过程,并对比稳态特性,给出了该电路关键参数的约束条件。实验结果表明,该电路实现了正常的起动以及关机磁复位,验证了所提出方法的正确性和可行性。Methods of starting-up and stopping magnetic reset of boost inductors were investigated for a three-phase single-stage power factor correction （PFC） converter,which was based on current-fed full-bridge boost topology and operated in discontinuous current mode （DCM）. The boost inductors were replaced by the central-tapped inductors with flyback windings,and a novel structure of PFC circuit was proposed which can start up and achieve stopping magnetic reset of boost inductors by itself. The converter operated in flyback mode when starting and stopping,and the charging of output filter capacitor and magnetic reset of boost inductors were realized respectively with the help of flyback windings. The process of starting and stopping magnetic reset of boost inductors of the converter was analyzed,and the constrained conditions of the key parameters were given through comparing with the characteristics of steady state. Experimental results show that it achieves starting-up and stopping magnetic reset for this converter,and prove the validity and feasibility of the proposed methods.

关 键 词：三相功率因数校正 单级 全桥 起动 关机磁复位 

分 类 号：TM46[电气工程—电器]