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Cascode型GaNHEMT输出伏安特性及其在单相逆变器中的应用研究

, PP. 295-303

Keywords: 宽禁带半导体器件,GaN,HEMT,共源共栅结构,输出伏安特性

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Abstract:

近年来随着氮化镓器件制造工艺的迅速发展,氮化镓高电子迁移率晶体管(GaNHEMT)已经开始应用在电力电子领域。高压共源共栅(Cascode)GaNHEMT的出现使得GaN器件可以在高压场合进行应用。本文首先研究了耗尽型GaNHEMT及CascodeGaNHEMT全范围输出伏安特性及其特点。结合SiMOSFET和耗尽型GaNHEMT的特性,本文重点研究了CascodeGaNHEMT的工作模态及其条件。最后,给出了500W基于600VCascodeGaNHEMT单相全桥逆变器的实验验证。实验结果和仿真验证证明了理论分析的正确性。

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