电器与能效管理技术Issue(3)：7-14,29,9.DOI:10.16628/j.cnki.2095-8188.2024.03.002
一种BCM Boost PFC电路的VCFF控制策略
A VCFF Control Strategy of BCM Boost PFC Circuit
刘光清 1林维明1
作者信息
- 1. 福州大学电气工程与自动化学院,福建福州 350108
- 折叠
摘要
Abstract
The control strategy of constant on time(COT)is usually used in Boost power factor correction(PFC)circuits working in boundary conduction mode.The change of switching frequency in this control strategy is related to the input voltage,output power and the inductor.The conversion efficiency of the circuit will be affected by too high switching frequency under light load.Aiming at the above problems,a control strategy of valley count frequency flyback(VCFF)is proposed.By detecting the valley count of the MOS transistor voltage,the circuit works in discontinuous conduction mode during light load to reduce the switching frequency and improve light load efficiency.A prototype experiment is made.The experimental results show that compared with the COT control strategy,the proposed control strategy can effectively improve the light load efficiency.Under the input voltage of 220 Vrms,the 10％～50％load efficiency can be reached up to above 0.96.关键词
LED驱动电源/Boost功率因素校正电路/临界导通模式/轻载效率Key words
LED driver/Boost power factor correction(PFC)circuit/boundary conduction mode(BCM)/light load efficiency分类
信息技术与安全科学引用本文复制引用
刘光清,林维明..一种BCM Boost PFC电路的VCFF控制策略[J].电器与能效管理技术,2024,(3):7-14,29,9.
