电工技术学报2011，Vol.26Issue(11)：14-24,11.
电流断续模式Boost功率因数校正变换器的变占空比控制
DCM Boost PFC Converter with Variable Duty Cycle Control
姚凯 1阮新波 1冒小晶 1叶志红2
作者信息
- 1. 南京航空航天大学航空电源重点实验室,南京210016
- 2. 光宝科技股份有限公司,南京210019
- 折叠
摘要
Abstract
DCM Boost PFC converter features zero-current turn-on for the switch,no reverse recovery in diode and constant frequency operation,however,the input power factor（PF）is relatively low when the duty cycle is constant within one half the line cycle.This paper derives the expressions of the input current and PF of DCM Boost PFC converter,and based on which,a variable duty cycle control is proposed so as to improve the PF to nearly 1 in the whole input voltage range.A method of fitting the duty cycle is further proposed for simplifying the circuit implementation.Besides a higher PF,the proposed variable duty cycle control achieves a lower output voltage ripple and a higher efficiency over the constant duty cycle control.The experimental results from a 120W universal input prototype are given to verify the effectiveness of the proposed method.关键词
功率因数校正/电流断续模式/变占空比控制Key words
Power factor correction/discontinuous current mode（DCM）/variable duty cycle control分类
信息技术与安全科学引用本文复制引用
姚凯,阮新波,冒小晶,叶志红..电流断续模式Boost功率因数校正变换器的变占空比控制[J].电工技术学报,2011,26(11):14-24,11.
