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一种基于内部栅极状态提取的SiC MOSFET栅极开路故障检测方法

A Gate Open-Circuit Failure Detection Method of SiC MOSFETs Based on Internal Gate State Extraction

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中文摘要

栅极键合线断裂导致的栅极开路故障是SiC MOSFET的一种新型失效模式,易引发直通故障及栅极氧化层击穿。为提升SiC器件的可靠性,本文提出了一种快速准确的栅极开路故障检测方案,通过提取内部栅极状态,实现对该失效模式的有效监测与预警。

English Abstract

Gate open-circuit failure caused by cracking and liftoff of gate bond wires has been demonstrated to be a new failure mode of silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (mosfets), which can cause serious consequences such as shoot-through fault and gate-oxide breakdown. To enhance the reliability and robustness of SiC mosfets, a fast and accurate detection scheme for ...
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SunView 深度解读

该技术对阳光电源的核心产品线(如组串式/集中式光伏逆变器、PowerTitan/PowerStack储能系统)具有极高的应用价值。随着SiC MOSFET在高性能功率变换器中的广泛应用,其可靠性直接决定了系统的长效运行。该故障检测方法可集成至iSolarCloud智能运维平台或逆变器/PCS的驱动控制电路中,实现对SiC功率模块早期失效的在线诊断,有效预防直通等严重故障,显著提升产品在极端工况下的鲁棒性,降低运维成本,是提升阳光电源电力电子产品竞争力的关键技术方向。