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交错边界导通模式与连续导通模式在功率变换器中的磁性元件体积对比

Interleaved Boundary Conduction Mode Versus Continous Conduction Mode Magnetic Volume Comparison in Power Converters

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中文摘要

本文对比了边界导通模式(BCM)与连续导通模式(CCM)在功率变换器中的应用。BCM通过软开关技术提升效率,但因RMS电流增大导致导通损耗增加。文章探讨了交错技术在优化磁性元件体积与效率平衡方面的作用,为高功率密度变换器设计提供了理论依据。

English Abstract

Power converters operating in boundary conduction mode (BCM) can benefit from an efficiency increase compared to continuous conduction mode (CCM) based on the soft-switching transitions at turn-on and/or turn-off. However, for a given average inductor current, the RMS current in BCM converters becomes larger than in CCM converters, leading to an increase in conduction losses. Interleaving smaller ...
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SunView 深度解读

该研究直接关系到阳光电源组串式逆变器及储能变流器(PCS)的核心功率密度提升。在PowerTitan等储能系统和高功率组串式逆变器中,磁性元件(电感)体积是限制功率密度的关键因素。采用交错BCM技术可在保证软开关效率优势的同时,通过优化磁性元件设计进一步缩小体积,有助于提升产品竞争力。建议研发团队在下一代高频化PCS产品中,评估交错BCM拓扑对散热设计和电感损耗的综合影响,以实现更优的体积效率比。