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功率器件技术 SiC器件 功率模块 可靠性分析 故障诊断 ★ 5.0

基于双端口栅极驱动器的SiC功率MOSFET短路检测准浮动栅概念

Quasi-Flying Gate Concept Used for Short-Circuit Detection on SiC Power MOSFETs Based on a Dual-Port Gate Driver

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中文摘要

本文提出了一种基于准浮动栅概念的双端口栅极驱动架构,旨在保护SiC功率MOSFET免受短路事件影响。该架构通过监测硬开关故障(HSF)导致的栅极漏电流和负载下故障(FUL)引起的栅极电荷注入,有效识别短路状态,提升了宽禁带半导体器件在极端工况下的可靠性。

English Abstract

The proposed dual-port gate driver architecture relies on a quasi-flying gate concept to protect SiC power mosfets against short-circuit events. Hard switching faults (HSFs) extract charges from the gate by causing a leakage current toward the source, while faults under load (FUL) lead to charge injection into the gate through the reverse transfer capacitance (CGD). Such phenomena lead to perturba...
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SunView 深度解读

该技术对阳光电源的核心产品线具有极高的应用价值。随着公司在光伏逆变器(如组串式、集中式)及储能系统(如PowerTitan、PowerStack)中大规模应用SiC器件以提升效率和功率密度,SiC的短路保护成为提升系统可靠性的关键。该准浮动栅驱动方案能够更精准地识别短路故障,减少误触发,延长功率模块寿命。建议研发团队在下一代高功率密度逆变器及PCS产品中引入该驱动架构,以应对SiC器件在高压、高频切换下的严苛保护需求,进一步巩固公司在电力电子技术领域的领先地位。