牽引變流器IGBT失效特性與壽命預(yù)測(cè)方法研究

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關(guān)鍵詞：牽引變流器；IGBT；失效；可靠性；損耗；結(jié)溫；壽命預(yù)測(cè)DOI：10.15938/j. emc.2025.06.012中圖分類(lèi)號(hào)：TM46 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1007-449X（2025）06-0113-11

Study on failure charactersitcs and life prediction method of IGBT in traction converter

LIU Haitao1，2， LIU Xingping2， KANG Lixuan2， LIU Wenye2， XIANG Chaoqun 1 （1.School of Traffic and Transportation Engineering，Central South University，Changsha 41OO75，China; 2. CRRC ZIC Research Institute of Electrical Technology& Material Engineering，Zhuzhou ，China）

Abstract：The IGBT is the most critical component in the traction system while also exhibiting a high failure rate. The way to utilize operational condition data from traction converters to extract IGBT working characteristics constitutes a key challenge.To enhance the reliability of traction converters during operation，an IGBT service life prediction method specifically was proposed for locomotive traction converters. Through analyzing IGBT module samples collected from several years of field operation，failure modes were identified.Accelerated lifespan testing at the converter component level under simulated field conditions was conducted，establishing an IGBT lifespan model. Subsequently，an online loss and junction temperature calculation model for traction converters was developed. By real-time acquisition of operational parameters and electrical data during line operation，this model continuously computes IGBT power losses and junction temperatures. Online rainflow counting was employed to statistically analyze thermal stresses，enabling lifespan model-based prediction of IGBT remaining service life. Finall，an IGBT lifespan prediction device for traction converters was implemented and validated through practical application on operational railway lines.The proposed method demonstrates streamlined computation processes，high efficiency，and significant engineering application value.

Keywords：traction converter； insulated gate bipolar transistor；failure；reliability； loss；junction temperatures；life predict

0引言

絕緣柵雙極型晶體管（insulatedgatebipolartransistor，IGBT）具有載流密度大、飽和壓降低等許多優(yōu)點(diǎn)，已廣泛應(yīng)用于軌道交通、高壓輸電、風(fēng)電、光伏等諸多關(guān)鍵領(lǐng)域中[1-4]。（剩余11550字）