大功率IGBT的短路故障检测

doi:10.19595/j.cnki.1000-6753.tces.170360

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摘要

电力电子装置核心器件IGBT模块发生短路故障后若不能及时进行保护,则装置可能损坏和损毁,甚至造成重大安全事故和经济损失,尤其对于可靠性要求极高的军事领域。IGBT模块短路后一般依靠其配套的驱动器进行检测及保护,然而目前的驱动器对于IGBT模块短路检测存在盲区。基于此,该文针对IGBT模块硬短路、软短路、过电流等故障现象,通过理论分析及实验测试IGBT短路故障时的电量信号特征,并对比各种IGBT短路故障检测方案的优缺点,提出了一种基于驱动器利用简单运放电路等进行IGBT集电极电流在线估计的方案,实现了IGBT模块较为完善的短路故障（硬短路、软短路、过电流）检测。

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	胡亮灯
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	肖明恺
	艾胜

关键词 ： IGBT, 短路, 驱动器, 集电极电流, 在线检测

Abstract：

IGBTs are the core of the power electronics equipment. If a short-circuit fault occurs in the IGBT and it cannot be protected in time, the equipment will probably suffer damage, which even can cause a severe accident and economic loss. Therefore, it is necessary to take precautions to protect the equipment, especially the military devices of high reliability. The IGBT generally depends on accessory drivers for protection when a short-circuit fault occurs, but now they are not yet qualified for fault detection and prevention perfectly. For this reason, to solve the problems of hard or soft short-circuit and overcurrent in the IGBT, this paper analyzes the electrical signal characteristics of its short-circuit faults, compares various kinds of short-circuit fault detection plans and proposes a scheme of online estimation for the IGBT collector current by use of its driver with simple op amp circuit. Thus, IGBTs fault can be perfectly detected.

Key words： IGBT short circuit driver collector current online detection

收稿日期: 2017-04-01 出版日期: 2018-06-13

PACS:

TM93

基金资助:

国家自然科学基金（51177170,51477180,51377167）和国家重点基础研究发展计划（973计划）（2015CB251004）项目资助

通讯作者: 肖明恺男,1993年生,硕士研究生,研究方向为电力电子与电力传动。E-mail：hgdxmk@163.com

作者简介: 胡亮灯男,1986年生,博士,副研究员,研究方向为IGBT门极驱动技术及大容量电能变换技术。E-mail：hldhgd@163.com

引用本文:

胡亮灯, 孙驰, 陈玉林, 肖明恺, 艾胜. 大功率IGBT的短路故障检测[J]. 电工技术学报, 2018, 33(11): 2592-2603. Hu Liangdeng, Sun Chi, Chen Yulin, Xiao Mingkai, Ai Sheng. Short-Circuit Fault Detection for High-Power IGBT. Transactions of China Electrotechnical Society, 2018, 33(11): 2592-2603.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170360 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I11/2592

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