Research on Simplified Variable On-time Control of Critical Boost-PFC Circuit

doi:10.16628/j.cnki.2095-8188.2023.12.004

Abstract

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

CLC Number:

TM46

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.

Figures/Tables 20

References 25

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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