Calibration Methods for Junction Temperature Measurement of High Power IGBT Modules

doi:10.11930/j.issn.1004-9649.201910055

Abstract

Abstract: The accuracy junction temperature measurement is of great significance for condition monitoring and reliability assessment of power IGBT devices. The junction temperature measurement method using saturation voltage drop at small current is the most widely used method and is recommended by various test standards. Calibration is the first step of this method and also the basis of junction temperature measurement. The traditional calibration method has the problem of applicability and accuracy for high power IGBT modules. Firstly, the accuracy of two commonly used calibration systems is discussed and compared, and a new calibration system based on electromagnetic heating is proposed, and its accuracy is verified by experiment. Secondly, the non-linearity of calibration curve is discussed and analyzed, and the necessity of calibration at full temperature range and polynomial fitting is pointed out, which further complements the calibration method. This paper can provide a methodology guidance for calibration of high power IGBT modules.

Key words: high power IGBT modules, junction temperature measurement, V_ce(T) method, calibration method, electromagnetic heating

CHEN Jie, DENG Erping, ZHAO Zixuan, YING Xiaoliang, HUANG Yongzhang. Calibration Methods for Junction Temperature Measurement of High Power IGBT Modules[J]. Electric Power, 2021, 54(8): 109-117.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201910055

https://www.electricpower.com.cn/EN/Y2021/V54/I8/109

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