Advanced electrothermal Spice modelling of large power IGBTs

A novel IGBT electrothermal model is implemented for the first time in PSpice for the simulation of steady state and transient temperature dependent IGBT operation including self-heating and latchup. A thermal circuit representing the characteristics of the IGBT package is developed and validated against a finite element model and experimental results. A novel electrical IGBT model based on the Kraus model is developed to account for the electrical impact of instantaneous junction temperature variations owing to self-heating. The resulting electrothermal model is validated against experimental DC and transient FBSOA measurements.