AGING MONITORING OF BOND WIRES BASED ON EMR SIGNAL SPECTRUM CHARACTERISTICS FOR IGBT MODULE

Progress in Electromagnetics Research Symposium : [proceedings]. Progress in Electromagnetics Research Symposium Pub Date : 2022-01-01 DOI:10.2528/pier22051607

Zhihui Ren, Mingying Du, Jinliang Yin, Chao Dong, Z. Ouyang

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Abstract

|Bond wires aging is one of the most common failure modes of insulated gate bipolar transistor (IGBT) module. Real-time monitoring of bond wires status is an important guarantee for the stable operation of power electronics system. In this paper, a method of monitoring the aging state of bond wires in IGBT module based on the spectrum characteristics of electromagnetic radiation (EMR) signature is proposed. Firstly, the turn-oﬀ process of IGBT module is analyzed, and the behavior model of IGBT module in the stage of rapid current change is established, which shows that EMR interference in buck converter mainly occurs during the turn-oﬀ process of IGBT module. Secondly, the relationship between the aging degree of bond wires and diﬀerential mode (DM) interference signal is deduced. Thirdly, the IGBT module is equivalent to a magnetic dipole, which proves that the change of DM interference signal will cause the change of EMR signal, thus demonstrating the feasibility of using EMR signal to monitor bond wires aging. Finally, a buck converter composed of IGBT module is used as the equipment to be tested. The EMR signal is extracted by the near-(cid:12)eld probe, and the EMR signal spectrum is used to monitor the aging degree of the bond wires. The experimental results show that with the deepening of the aging degree of bond wires, the spectrum amplitude of EMR signal increases.

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基于光模块emr信号频谱特性的焊线老化监测

键合线老化是绝缘栅双极晶体管(IGBT)模块最常见的失效模式之一。对键合线状态进行实时监测是电力电子系统稳定运行的重要保证。提出了一种基于电磁辐射(EMR)频谱特征的IGBT模块焊线老化状态监测方法。首先，分析了IGBT模块的关断过程，建立了IGBT模块在电流快速变化阶段的行为模型，表明降压变换器中的EMR干扰主要发生在IGBT模块的关断过程中。其次，推导了结合线老化程度与差分模干扰信号的关系。第三，IGBT模块相当于一个磁偶极子，证明DM干扰信号的变化会引起EMR信号的变化，从而证明了利用EMR信号监测键合线老化的可行性。最后，采用IGBT模块组成的降压变换器作为测试设备。采用近场(cid:12)探头提取EMR信号，利用EMR信号谱监测焊线的老化程度。实验结果表明，随着焊线老化程度的加深，EMR信号的频谱幅度增大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Progress in Electromagnetics Research Symposium : [proceedings]. Progress in Electromagnetics Research Symposium

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