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拓扑与电路 DC-DC变换器 PFC整流 功率模块 ★ 3.0

基于DCM模式下改进型SEPIC变换器的高功率因数整流器

High-Power-Factor Rectifier Using the Modified SEPIC Converter Operating in Discontinuous Conduction Mode

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中文摘要

本文提出了一种工作在断续导通模式(DCM)下的改进型SEPIC DC-DC变换器,用作功率因数校正(PFC)预调节器。该拓扑在DCM模式下实现了低输入电流纹波,且开关管电压应力低于输出电压。这种电压应力的降低显著提升了变换器的可靠性。

English Abstract

The theoretical and experimental analysis of a modified version of the SEPIC dc-dc converter used as preregulator operating in discontinuous conduction mode (DCM) is presented in this paper. The proposed converter presents a low input current ripple operating in DCM, and the switch voltage is lower than the output voltage. The switch voltage reduction increases the converter reliability and a low ...
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SunView 深度解读

该研究提出的改进型SEPIC拓扑在降低开关管电压应力方面具有优势,对提升电力电子变换器的可靠性有参考价值。在阳光电源的产品线中,该技术可应用于小功率户用光伏逆变器或充电桩的前级PFC电路设计。通过优化DCM模式下的电流纹波和电压应力,有助于减小磁性元件体积并提升整机效率。建议研发团队关注该拓扑在低压直流输入场景下的应用潜力,以进一步优化户用储能系统或小型充电模块的功率密度与成本控制。