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Based on the design requirements of IGBT DC chopper electric drive system for 80 t mining electric locomotive, this paper expounds the structure, main technical indexes, circuit working principles and characteristics of IGBT DC chopper electric drive system, analyzes the characteristics of IGBT DC chopper non-absorbing loop technology, and carries out the technical transformation of electric drive system for the old cars. After transformation, the using quantity of cables has been greatly reduced.

, authors=Hui-min XU, Hong-wei WANG, Chun-ling BAI, authorsList=Hui-min XU, Hong-wei WANG, Chun-ling BAI, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1319263314945884447, articleId=1319263314081857821, tenantId=1146029695717560320, journalId=1185652524569653253, language=CN, title=80 t工矿电机车全数字斩波调速系统改造, columnId=1319263296851661014, journalTitle=包钢科技, columnName=机械制造与电气自动化, runingTitle=null, highlight=null, articleAbstract=

从80 t工矿电机车IGBT直流斩波电气传动系统设计要求出发，阐述了IGBT直流斩波电气传动系统结构、主要技术指标、电路工作原理及特点。分析了IGBT直流斩波器无吸收回路技术特征，并对老车进行电气传动系统技术改造。改造后电缆使用数量大为减少。

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许慧敏（1985-），男，内蒙古乌兰察布市人，工程师，现从事矿山电力机车技术管理工作。

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许慧敏（1985-），男，内蒙古乌兰察布市人，工程师，现从事矿山电力机车技术管理工作。

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