基于IGBT的直流输入型变流器预充电方案研究  

Research on IGBT Based Pre-charge Scheme of DC Input Converter

作　　者：李子先 唐娟 杨奎 张路军 LI Zixian;TANG Juan;YANG Kui;ZHANG Lujun(Zhuzhou CRRC Times Electric Co.,Ltd.,Zhuzhou,Hunan 412001,China)

机构地区：[1]株洲中车时代电气股份有限公司,湖南株洲412001

出　　处：《控制与信息技术》2020年第3期63-67,共5页CONTROL AND INFORMATION TECHNOLOGY

基　　金：国家重点研发计划(2017YFB1201000,2018YFB1201605)。

摘　　要：目前,轨道车辆用直流输入型变流器主要采用接触器和充电电阻器相配合的方式为其前端电容器进行预充电,该方式存在成本过高、体积过大的缺陷。对此,文章提出了一种基于IGBT开关管的新型预充电方案,其采用PWM控制方式控制电容器充电电流大小,实现电容电压缓慢上升,从而完成预充电。由于IGBT为无触点开关,因此该方案还具有可靠性高、开关寿命长的优势。文章详细描述了该方案的拓扑结构、工作原理及控制策略,并通过仿真验证了该方案的可行性和有效性。At present,DC input converters for rail vehicles mainly use contactors and charging resistors to pre-charge their frontend capacitors,which has the disadvantages of high cost and excessive size of the converter.In this regard,it proposed a new pre-charge scheme based on IGBT.In this scheme,PWM control is used for IGBT to control the charging current of capacitor to achieve a slow rise of capacitor voltage and complete pre-charge.Since IGBT is a contactless switch,this solution also has the advantages of good reliability and long switch life.The paper describes the topological structure,working principle and control strategy of the scheme in detail,and verifies the feasibility and effectiveness of the scheme through simulation.

关 键 词：直流变流器 预充电 BUCK电路 恒脉宽调制 变脉宽调制 

分 类 号：TM131[电气工程—电工理论与新技术] U223.5[交通运输工程—道路与铁道工程]