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

Claim 12:
13. A system for comprehensively evaluating reliability of a multi-chip parallel IGBT module, comprising:
a first failure characteristic quantity acquisition module, used to establish a gate-emitter voltage reliability model of the multi-chip parallel IGBT module, implement a chip fatigue failure test based on the gate-emitter voltage reliability model, and select a gate-emitter voltage as a failure characteristic quantity;
a second failure characteristic quantity acquisition module, used to establish a transconductance reliability model of the multi-chip parallel IGBT module, implement a bonding wire shedding failure test based on the transconductance reliability model, and select a transmission characteristic curve of the module as a failure characteristic quantity;
a health degree calculation module, used to define a degree of health of the IGBT module, use a Pearson correlation coefficient to characterize the degree of health, and calculate 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
a reliability evaluation module, used to comprehensively evaluate the reliability of the multi-chip parallel IGBT module according to PPMCCC and PPMCCB.