单级BUCK BOOST变换器实现APFC的原理及分析

电源技术单级BUCK-BOOST变换器实现APFC的原理及分析刘宇谢品芳罗全明重庆大学电气工程学院(400044)摘要:本文分析了用BUCK-BOOST电路和反激变换器隔离实现单级功率因数校正的原理和变换过程,给出了电路的Matlab仿真分析的模型。通过对变换器工作在DCM模式下的电路仿真,验证了此方法有良好的效果。关键词:功率因素校正单级反激变换器Principle and analysis of a Single-Stage BUCK-BOOST Converter AchievingAPFCLiu yu Xie Pinfang Luo Quanming Electrical Engineering College of ChongQing UniversityAbstract:This paper presents the theory of single-stage converterachieving high-power-factor by BUCK-BOOST circuit and isolated by flybackconverter,giving the simulated model with Matlab and the process oftransform.The results of simulation which the converter working in theDCM(discontinuous conduction mode)verify that the method has a good effect.