基于热敏感电参数法的大容量IGBT模块动态结温在线检测研究  

Dynamical Junction Temperature Online Extraction With Thermal Sensitive Electrical Parameters for High Power IGBT Modules

作　　者：祝冲冲 王祥[1] 罗皓泽[1] 周宇[1] 杨欢[1] 李武华[1] 何湘宁[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《中国电机工程学报》2017年第9期2686-2693,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划(973项目)(2014CB247400);国家自然科学基金项目(51490682;51677166)~~

摘　　要：绝缘栅双极型晶体管(insulated gate bipolar transistor,IGBT)在风力发电等大功率系统中应用广泛,其可靠性越来越受到学术界和工业界重视,鉴于结温是影响IGBT模块可靠性的重要因素,国内外学者提出了诸多基于热敏感电参数的结温提取方法,然而较少涉及大容量IGBT模块动态结温在线监测和测试的研究。设计和搭建了基于H桥拓扑的兆瓦级应用工况复现平台,可开展大功率变流系统的运行工况型式测试。以关断延迟时间为热敏感电参数,简要论述了其与器件结温和负载电流等运行工况的相关性,并通过实测构建了三维数据库。基于运行工况复现平台,研究了大容量IGBT模块在不同基波频率下的结温波动特征,并通过模块内置的负温度系数(negative temperature coefficient,NTC)热敏电阻进行结温波动对比,验证了以关断延迟时间进行IGBT模块结温在线提取和检测具有灵敏度高、响应速度快和易于集成的优点。The junction temperature monitor for insulated gate bipolar transistor （IGBT） modules is of great importance for reliability issues in the voltage-source-converters. How to achieve dynamical junction temperature online extraction is significantly challengeable in the power electronics community, In this paper, a MW-level practical operation reappearance test benchmark with H-bridge topology was constructed, which can test many different work conditions in the real power eonvergion ~y^temg. Furthermore, the turn-off delay time was employed as a thermal sensitive electrical parameter for the dynamical junction temperature extraction. And the relationship among the turn-off delay time, junction temperature of IGBT module and collector current was established. The 3-D database was built by the experimental results from the operation reappearance test bench. Furthermore, the IGBT junction temperature variation with load frequency change is also studied to show that the turn-off delay time is an excellent candidate for dynamical junction temperature online extraction due to its high sensitivity, fast response and easy integration.

关 键 词：大容量IGBT模块 热敏感电参数法 工况复现 结温提取 关断延迟时间 

分 类 号：TM464[电气工程—电器]