一种新型部分可变通时临界模式升压PFC变换器

2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC) Pub Date : 2017-10-01 DOI:10.1109/EDSSC.2017.8355949

Chunwei Zhang, Yang Li, Xiaoqian Fu, Zhiming Li

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引用次数: 0

摘要

本文分析了恒定导通时临界模式功率因数校正(PFC)变换器的总谐波失真(THD)。分析发现，高THD主要来自于低输入电压条件下的大电流畸变。为了解决这一问题，提出了一种部分可变的升压PFC变换器。对于所提出的PFC变换器，当输入电压小于输出电压的一半时，导通时间得到增强，从而减轻了输入电流的畸变。实验结果表明，该新型PFC变换器在不同的输入电压下均能实现小的THD(≪10%)和高的功率因数(< 0.99)，与传统的PFC相比有了很大的改进。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A novel partially variable on-time critical mode boost PFC converter

In this paper, the total harmonic distortion (THD) of the critical mode power factor correction (PFC) converter with constant on-time is analyzed. Our analyses find that the high THD mainly comes from the high current distortion at low input voltage condition. To solve the problem, a novel partially variable on-time boost PFC converter is proposed. For the proposed PFC converter, the on-time is enhanced when the input voltage is smaller than half output voltage, so as to alleviate the distortion of input current. The experimental results show that the novel PFC converter achieve small THD (≪10%) and high power factor (≫0.99) at different input voltages, which are greatly improved compare with the traditional PFC.

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2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC)

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