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功率IGBT模块热网络参数提取研究综述

来源：电工电气发布时间：2017-10-19 14:19 浏览次数：3

功率IGBT模块热网络参数提取研究综述

王存乐，李志刚，李雄，孔梅娟

（河北工业大学电气工程学院，天津 300130）

摘要：功率IGBT 模块热网络参数与IGBT 的可靠性密切相关。介绍了Foster 热网络和Cauer 热网络参数的获取方法。Foster 热网络参数通过瞬态热阻抗曲线的指数级拟合得到，根据获得瞬态额阻抗曲线方式的不同，又可以分为直接测温法、有限元法、温敏参数法和双界面瞬态测量法；Cauer 热网络参数除了利用瞬态热阻抗曲线拟合方式得到，还可以根据器件的封装结构计算获得。探讨了现阶段热网络参数获取存在的主要问题，指出根据IGBT 功率器件在正常运行过程中的相关测量，对热网络参数直接进行在线识别，可减少因热网络参数测量而造成的损失，对于结温的实时估测和寿命预测至关重要。

关键词：功率IGBT 模块；Foster 热网络；Cauer 热网络；参数获取

中图分类号：TN322⁺.8 文献标识码：A 文章编号：1007-3175(2017)10-0001-06

Review of Research on Thermal Network Parameters Extraction of Power Insulated Gate Bipolar Translator Module

WANG Cun-le, LI Zhi-gang, LI Xiong, KONG Mei-juan

（School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China）

Abstract: The thermal network parameters of power insulated gate bipolar translator (IGBT) module are closely related to the reliability of the IGBT. Introduction was made to the parameters acquisition methods of Foster thermal network and Cauer thermal network. Foster thermal network parameters could be obtained by matching the exponential order of transient thermal impedance curves. According to the difference of the ways of obtaining the transient impedance curves, it can be divided into direct temperature method, finite element method, thermo-sensitive parameter method and double interface transient measurement method. Cauer thermal network parameters could be obtained like the above method, in addition, Cauer thermal network parameters could be obtained according to the device package structure. The main problems existing in thermal network acquisition at present were discussed. According to the correlation measurement in the normal operation process of IGBT power device, the thermal network parameters were carried out online identification to reduce the losses caused by thermal network parameters, which is crucial for real-time junction temperature estimation and life forecast.

Key words: power insulated gate bipolar translator module; Foster thermal network; Cauer thermal network; parameter acquisition

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功率IGBT模块热网络参数提取研究综述