TY - GEN
T1 - Accelerated Voltage Endurance Test and Insulation Lifetime Estimation of Silicone-Gel Encapsulated Direct-Bond-Copper Substrates for Medium-Voltage Power Module Packaging
AU - Gao, Yuan
AU - Zhang, Zichen
AU - Zintak, Zachary
AU - Arriola, Emmanuel
AU - Aunsborg, Thore Stig
AU - Munk-Nielsen, Stig
AU - Lu, Guo-Quan
PY - 2024/3/12
Y1 - 2024/3/12
N2 - The advent of medium-voltage silicon carbide devices presents the potential to significantly improve the efficiency and simplicity of power electronics for grid-tied applications. However, the frequent occurrence of insulation failure in me-dium-voltage power modules undermines their reliability and hampers their widespread adoption. There is a lack of research on the insulation characteristics of the module under long-term high voltage stresses. In this work, an accelerated voltage endurance test was conducted on alumina direct-bond copper substrates encapsulated in a silicone gel to establish an insulation lifetime model for medium-voltage power modules. Based on the test data and the model, to achieve an insulation life exceeding one year for the substrate under a constant voltage stress, the maximum operating voltage is recommended to be lower than 49% of its partial discharge inception voltage.
AB - The advent of medium-voltage silicon carbide devices presents the potential to significantly improve the efficiency and simplicity of power electronics for grid-tied applications. However, the frequent occurrence of insulation failure in me-dium-voltage power modules undermines their reliability and hampers their widespread adoption. There is a lack of research on the insulation characteristics of the module under long-term high voltage stresses. In this work, an accelerated voltage endurance test was conducted on alumina direct-bond copper substrates encapsulated in a silicone gel to establish an insulation lifetime model for medium-voltage power modules. Based on the test data and the model, to achieve an insulation life exceeding one year for the substrate under a constant voltage stress, the maximum operating voltage is recommended to be lower than 49% of its partial discharge inception voltage.
M3 - Article in proceeding
SP - 341
EP - 345
BT - CIPS 2024; 13th International Conference on Integrated Power Electronics Systems
ER -