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Online Estimation of the Junction Temperature Based on the Gate Pre-Threshold Voltage in High-Power IGBT Modules.
- Source :
- IEEE Transactions on Device & Materials Reliability; Sep2019, Vol. 19 Issue 3, p501-508, 8p
- Publication Year :
- 2019
-
Abstract
- A model for the online estimation of junction temperature based on the gate pre-threshold voltage in high-power insulated-gate bipolar transistors (IGBTs) was proposed. First, the turn-on behavior and temperature dependence of the gate-emitter voltage during the turn-on delay period were studied. It was revealed that the turn-on waveform of the gate-emitter voltage exhibits a point of inflection after which the voltage between the gate and emitter increases significantly; at this point, the relationship between the voltage and the temperature changes from a positive correlation to a negative correlation. Meanwhile, analyses on the basis of semiconductor physics revealed that the negative correlation between gate-emitter voltage and temperature is caused by the temperature dependence of the flatband voltage. Finally, a model for estimating the junction temperature was established based on a combination of the turn-on delay time and the gate prethreshold voltage which is negatively correlated with the temperature, to eliminate the effect of the bus voltage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15304388
- Volume :
- 19
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Device & Materials Reliability
- Publication Type :
- Academic Journal
- Accession number :
- 138479689
- Full Text :
- https://doi.org/10.1109/TDMR.2019.2923457