A BOND WIRE DEGRADATION MONITORING METHOD FOR WIRE-BONDED IGBT MODULES BASED ON COLLECTOR-EMITTER VOLTAGE INITIAL-VALUE CORRECTION

Yang Peng, Tian Yuan, Gao Shuguo, Zhu Ruimin, Luo Xi, Xing Chao

Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 114-125.

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 114-125. DOI: 10.19912/j.0254-0096.tynxb.2024-2188

A BOND WIRE DEGRADATION MONITORING METHOD FOR WIRE-BONDED IGBT MODULES BASED ON COLLECTOR-EMITTER VOLTAGE INITIAL-VALUE CORRECTION

  • Yang Peng1, Tian Yuan1, Gao Shuguo1, Zhu Ruimin2, Luo Xi2, Xing Chao1
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Abstract

The collector-emitter saturation voltage (Vce,sat) of an insulated gate bipolar transistor(IGBT) module increases with bond wire lift-off, making it a common characteristic parameter for degradation monitoring. However, during actual operation, Vce,sat is influenced by both junction temperature (Tj) and collector current (Ic). This paper proposes a bond wire degradation monitoring method for wire-bonded IGBT modules based on initial-value correction of the collector-emitter voltage characteristic parameter. By mathematically modeling the IGBT output characteristic curves at different temperatures, the relationships amongTj,Ic, and Vce,sat are analyzed, and an equation for calculating the theoretical Vce,sat under varying Tj and Ic conditions is established. During monitoring, this equation is used to compute the initial Vce,sat corresponding to actual Tj and Ic under different operating conditions, thereby achieving initial-value correction for the normalized increase ηin saturation voltage. This correction reduces the influence of Tj and Ic onη. In this study, bond wire degradation was simulated by deliberately cutting wires, and changes in ηbefore and after correction were compared. The results show that, prior to the failure threshold, the proposed method significantly mitigates the effects of Tj and Ic onη, ensuring that the increase in Vce,sat is primarily attributable to bond wire degradation. The experimental results align well with theoretical analysis, confirming the feasibility and engineering applicability of this method for monitoring bond wire failure in IGBT modules under varying operating conditions.

Key words

insulated gate bipolar transistor (IGBT) / condition monitoring / bond wire / accelerated aging test / saturation voltage drop / failure

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Yang Peng, Tian Yuan, Gao Shuguo, Zhu Ruimin, Luo Xi, Xing Chao. A BOND WIRE DEGRADATION MONITORING METHOD FOR WIRE-BONDED IGBT MODULES BASED ON COLLECTOR-EMITTER VOLTAGE INITIAL-VALUE CORRECTION[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 114-125 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2188

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