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Online Condition Monitoring of Bond Wire Degradation Using Temperature Compensated on-State Resistance
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electric Power and Energy Systems.ORCID iD: 0000-0002-3652-459X
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electric Power and Energy Systems.ORCID iD: 0000-0002-1755-1365
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electric Power and Energy Systems.ORCID iD: 0000-0002-8565-4753
2025 (English)In: 2025 IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025, Institute of Electrical and Electronics Engineers (IEEE) , 2025Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a practical condition monitoring method for detecting bond wire degradation in TO247 packaged SiC MOSFET devices using ON-state resistance (RdsON) compensated for junction temperature variations. While RdsON is a promising health indicator, its strong dependence on junction temperature (Tj) limits its direct applicability in realworld systems. To overcome this, a novel approach is proposed that uses the temperature measured at the drain leg (TMidleg) as a proxy for Tj, enabling temperature-compensated RdsON measurements during power cycling tests (PCT). The method is experimentally validated on two SCT30N120 SiC MOSFET devices under active power cycling test conditions. The results demonstrate a clear correlation between the increase in RdsON measured at the defined TMidLeg and bond wire degradation, with similar trends observed when RdsON is evaluated at the minimum junction temperature (Tj,min) estimated using the TSEP method. Failure analysis confirms bond wire cracking without significant solder layer delamination, demonstrating the effectiveness of the proposed method for bond wire-related failure detection.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2025.
Keywords [en]
condition monitoring, health monitoring, junction temperature, ON-state resistance, power cycling, Silicon carbide (SiC) MOSFETs
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-377968DOI: 10.1109/ECCE58356.2025.11260319ISI: 001665554100808Scopus ID: 2-s2.0-105030318479OAI: oai:DiVA.org:kth-377968DiVA, id: diva2:2046489
Conference
17th Annual IEEE Energy Conversion Conference Congress and Exposition, ECCE 2025, Philadelphia, United States of America, October 19-23, 2025
Funder
StandUp
Note

Part of ISBN 9798331541309

QC 20260317

Available from: 2026-03-17 Created: 2026-03-17 Last updated: 2026-04-01Bibliographically approved

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Singh, Bhanu PratapNee, Hans-PeterNorrga, Staffan

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