Abstract
This paper presents a simple and accurate method to estimate the junction temperature of power transistors in a traction inverter drive. Junction temperature plays an important role in the traction inverter drive system as a health monitoring of the system and the de-rating strategy for the overall system. The inverter power loss is the main input parameter for the thermal model to estimate the junction temperature. This work presents a quantitative method that counts on the power transistor manufacturer datasheet to calculate the power loss, subsequently, it is used as an input to the thermal model to estimate the junction temperature of the power transistor. This method is verified using Simulink simulation and dSPACE-based experiment.
Published Version
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