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

Claim 0:
1. A method for comprehensively evaluating reliability of a multi-chip parallel insulated gate bipolar transistor (IGBT) module, comprising:
Step (1) of establishing a gate-emitter voltage reliability model of the multi-chip parallel IGBT module, implementing a chip fatigue failure test based on the gate-emitter voltage reliability model, and selecting a gate-emitter voltage as a failure characteristic quantity;
Step (2) of establishing a transconductance reliability model of the multi-chip parallel IGBT module, implementing a bonding wire shedding failure test based on the transconductance reliability model, and selecting a transmission characteristic curve of the module as a failure characteristic quantity;
Step (3) of defining a degree of health of the IGBT module, using a Pearson correlation coefficient to characterize the degree of health, and calculating a linear correlation PPMCCC in different degrees of chip fatigue failure states and a linear correlation PPMCCB in different degrees of bonding wire shedding failure states; and
Step (4) of comprehensively evaluating the reliability of the multi-chip parallel IGBT module according to PPMCCC and PPMCCB.