摘要
绝缘栅双极晶体管(IGBT)作为功率变流器的核心部件,监测其结温对于确保变流器的安全可靠运行具有重要的意义。依据电气参数的温敏特性,提出一种基于变流器特定开通时刻下米勒平台的IGBT结温监测方法,该方法可有效避免变流器运行工况对结温监测的影响。首先,分析了栅射极电压的充电过程,从理论上对特定开通时刻下米勒平台与结温的内在关系进行了阐述。其次,搭建小功率整流器实验平台,对不同温度下的米勒平台进行拟合,从而建立米勒平台与温度的映射关系,同时改变工况条件后对所提方法进行了验证;最后,对所提温敏参数影响因素进行了分析,理论与实验表明,该特征参数线性度较好,且不受工况的影响,可在变流器实际工况下实现IGBT结温的精准监测。
Insulated gate bipolar transistor(IGBT)is the core component of power converter.Monitoring its junction temperature is of great significance to ensure the safe and reliable operation of the converter.According to the temperature sensitive characteristics of electrical parameters,this paper presents an IGBT junction temperature monitoring method based on miller platform at a specific opening time of converter,which can effectively avoid the influence of converter operating conditions on junction temperature monitoring.Firstly,the charging process of grid emitter voltage was analyzed,and the internal relationship between miller platform and junction temperature at specific conduction time was described theoretically.Secondly,the experimental platform of low-power rectifier was built to fit the miller platform at different temperatures,so as to establish the mapping relationship between miller platform and temperature.At the same time,the proposed method was verified after changing the working conditions.Finally,the influencing factors of the proposed temperature sensitive parameters are analyzed.The theory and experiment show that the characteristic parameters have good linearity and are not affected by the working conditions,which can be used in the actual operation of the converter.
作者
杨宁
刘伟志
张林林
廖永康
葛兴来
YANG Ning;LIU Weizhi;ZHANG Linlin;LIAO Yongkang;GE Xinglai(Locomotive&Car Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Beijing Zongheng Electro-Mechanical Technology Co.,Ltd.,Beijing 100094,China;School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2023年第8期46-53,共8页
Electric Machines and Control
基金
国家重点实验室开放基金(2020YJ220/2051ZDM002)
高铁联合基金重点项目(U1934204)。
关键词
绝缘栅双极晶体管
变流器
温敏参数
栅射极电压
米勒平台
结温监测
insulated gate bipolar transistor
converter
temperature sensitive parameter
gate emitter voltage
miller platform
junction temperature estimation
