Distortion Elimination for Buck PFC Converter with Power Factor Improvement

Jiangtao Xu; Meng Zhu; Suying Yao

Distortion Elimination for Buck PFC Converter with Power Factor Improvement

Jiangtao Xu

Meng Zhu

Suying Yao

Vol. 15, No. 1, pp. 10-17, Jan. 2015

10.6113/JPE.2015.15.1.10

AC-DC converter

Buck

Power factor correction

Pulse assisting technique

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Abstract

A quasi-constant on-time controlled buck front end in combined discontinuous conduction mode and boundary conduction modeis proposed to improve power factor (PF).When instantaneous AC input voltage is lower than the output bus voltage per period, thebuck converter turns into buck-boost converter with the addition of a level comparator to compare input voltage and output voltage. The gate drive voltage is provided by an additional oscillator during distortion time to eliminate the cross-over distortion of the inputcurrent. This high PF comes from the avoidance of the input current distortion, thereby enabling energy to be delivered constantly. This paper presents a series analysis of controlling techniques and efficiency, PF, and total harmonic distortion. A comparison interms of efficiency and PF between the proposed converter and a previous work is performed. The specifications of the converterinclude the following: input AC voltage is from 90V to 264V, output DC voltage is 80V, and output power is 94W.This convertercan achieve PF of 98.74% and efficiency of 97.21% in 220V AC input voltage process.

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Cite this article

[IEEE Style]

J. Xu, M. Zhu, S. Yao, "Distortion Elimination for Buck PFC Converter with Power Factor Improvement," Journal of Power Electronics, vol. 15, no. 1, pp. 10-17, 2015. DOI: 10.6113/JPE.2015.15.1.10.

[ACM Style]

Jiangtao Xu, Meng Zhu, and Suying Yao. 2015. Distortion Elimination for Buck PFC Converter with Power Factor Improvement. Journal of Power Electronics, 15, 1, (2015), 10-17. DOI: 10.6113/JPE.2015.15.1.10.