中国电机工程学报2025，Vol.45Issue(19)：7683-7692,中插43,11.DOI:10.13334/j.0258-8013.pcsee.242206
一种用于图腾柱PFC轻载效率提升的变关断时间控制方法
A Variable Turn-off Time Control Method for Light Load Efficiency Improvement in Totem Pole PFC
摘要
Abstract
In order to save energy,efficient totem pole power factor correction(PFC)converters are becoming more and more important in distributed power systems.The traditional control method has a high switching frequency at light load,which limits the improvement of its light load efficiency.Based on the traditional fixed turn-off time control method,this paper proposes a variable turn-off time control method,which can extend the switching period by adjusting the turn-off time of the main switch under light load conditions.Compared with the existing fixed turn-off time control and critical conduction mode control,the proposed method can adaptively adjust the switching frequency according to the input power,so as to optimize the efficiency under different load conditions.At light load,the light load efficiency of the converter is improved by reducing the switching frequency.In the case of heavy load,the switching frequency only decreases near the zero-crossing point of the half-cycle of the power frequency,which does not affect the power factor(PF)in the entire voltage range while ensuring high efficiency.Finally,a 350 W totem pole PFC converter prototype is built in this paper.The experimental results show that compared with the fixed turn-off time control method,the efficiency of the proposed control strategy is improved by 2％under light load conditions,reaching 96％.关键词
图腾柱功率因数校正/可变关断时间/轻载效率/断续导通模式/开关频率Key words
totem pole power factor correction(PFC)/variable turn-off time/light load efficiency/discontinuous conduction mode/switching frequency分类
信息技术与安全科学引用本文复制引用
周玮阳,孙辰宇,金科..一种用于图腾柱PFC轻载效率提升的变关断时间控制方法[J].中国电机工程学报,2025,45(19):7683-7692,中插43,11.基金项目
国家自然科学基金项目(青年基金)(52207206) （青年基金）
航空科学基金项目(2022Z039052007) （2022Z039052007）
江苏省自然科学基金项目(青年科学基金)(BK20210306).Project Supported by National Natural Science Foundation of China(Young Scholars)(52207206) （青年科学基金）
Aeronautical Science Foundation Project(2022Z039052007) （2022Z039052007）
The Natural Science Foundation of Jiangsu Province(Young Scholars)(BK20210306). （Young Scholars）
