临界Boost-PFC电路的简化变导通时间控制研究

doi:10.16628/j.cnki.2095-8188.2023.12.004

摘要/Abstract

摘要：

针对传统恒定导通时间控制的临界Boost-PFC电路存在明显交越失真的现象,导致网侧特性较差的问题,提出了3种简化的变导通时间(VOT)控制策略。对所提3种VOT控制策略进行详细的对比分析,最后进行计算机仿真和200 W样机实验验证。计算机仿真和实验结果均表明,所提3种VOT控制策略均能有效改善电路的网侧特性,并能提高电路的效率。

关键词: 临界Boost-PFC电路, 变导通时间, 功率因数, 网侧特性, 效率

Abstract:

Aiming at the problem of poor line characteristics of the critical Boost-PFC circuit with traditional constant on-time control for the obvious crossover distortion, three simplified variable on-time (VOT) control strategies were proposed to improve the line characteristics of the circuit. The three kinds of VOT control strategies were compared and analyzed in detail.Finally, the computer simulation and 200 W prototype experiment were carried out.The computer simulation and experimental results show that the proposed three VOT control strategies can effectively improve the grid-side characteristics of the circuit and the efficiency of the circuit.

Key words: critical Boost-PFC circuit, variable on-time(VOT), power factor, grid-side characteristics, efficiency

中图分类号:

TM46

萧展涛, 万陆峰, 陈欣玮, 肖健. 临界Boost-PFC电路的简化变导通时间控制研究[J]. 电器与能效管理技术, 2023, 0(12): 22-31.

XIAO Zhantao, WAN Lufeng, CHEN Xinwei, XIAO Jian. Research on Simplified Variable On-time Control of Critical Boost-PFC Circuit[J]. LOW VOLTAGE APPARATUS, 2023, 0(12): 22-31.

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参数	取值	参数	取值

电感L_b/μH	500	输入电压U_ac/V_rms	185~265
输出电容C_o/μF	220	输出电压U_o/V	400
输入电容C_in/nF	220	输出功率P_o/W	40-200
等效电容C_r/pF	150	电源频率f_ac/Hz	50