Patent ID: 11966683
Assignee: WUHAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. The system for comprehensively evaluating the reliability of the multi-chip parallel IGBT module according to claim 13, wherein the health degree calculation module comprises:
a health parameter definition module, used to adopt the degree of health to characterize the reliability of the IGBT module, wherein when the module has no chip fatigue failure and no bonding wire shedding failure, the degree of health is maximum, when the IGBT module is in a healthy initial state without chip fatigue failure, a gate-emitter voltage eigenvector is {right arrow over (x)}, and when i chips fail in the IGBT module, a gate-emitter voltage eigenvector is {right arrow over (y)}i; and when the IGBT module is in the healthy initial state without bonding wire shedding failure, a transmission characteristic curve eigenvector of the IGBT module is {right arrow over (m)}; and when p bonding wires shed in the IGBT module, a transmission characteristic curve eigenvector of the IGBT module is {right arrow over (np)};
a chip health calculation module, used to obtain the linear correlation PPMCCC between the gate-emitter voltage in a chip fatigue failure state and a healthy state based on the gate-emitter voltage eigenvector {right arrow over (x)} and the gate-emitter voltage eigenvector {right arrow over (y)}i, wherein the greater the PPMCCC, the higher the correlation between the two, the higher the degree of health of chips, and the stronger the reliability; and
a bonding wire health calculation module, used to obtain the linear correlation PPMCCB between the transmission characteristic curve in a bonding wire shedding failure state and the healthy state based on the transmission characteristic curve eigenvector {right arrow over (m)} of the IGBT module and the transmission characteristic curve eigenvector {right arrow over (np)} of the IGBT module, wherein the greater the PPMCCB, the greater the correlation between the two, the higher the degree of health of bonding wires, and the higher the reliability of the module.