Volume 3 · Issue 3 (2026)
A Thermo-electric Coupled Reduced Order Model for Real-time Prediction of Power Electronic Devices
Hao Tang, Run Hu
School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, China
Abstract: Fast and accurate prediction method of the temperature field of power electronic devices are of increasing importance for monitoring and controlling the working state of electronics, especially when inserting temperature detectors is infeasible. Most existing prediction methods are only focused on heat transfer process and lack consideration of the coupling effect of the electric fields, making the prediction accuracy unsatisfactory. For this end, we develop a solution framework, named TE-ROM based on proper orthogonal decomposition and Galerkin projection method to solve the thermo-electric coupled field of power electronics. The model is validated on a self-developed half-bridge insulated gate bipolar transistor (IGBT) module. According to our tests with both static and dynamic conditions, our TE-ROM exhibits an outstanding speed-up ratio of 298 compared with full order model while the maximum absolute error being 1.64 K and mean absolute error being 0.18 K. Furthermore, TE-ROM facilitates a more accurate heat source distribution that results in accuracy improvement at bonding wire region since the mean absolute error reduces by 76.41% meanwhile the coefficient of determination improves from 0.6750 to 0.9842, demonstrating the importance of electrical self-heating for the temperature prediction of wires. Finally, our TE-ROM has achieved real-time temperature prediction for the full field at a time step of 10-1 s.
Keywords: Reduced Order Model; Power Electronic Device; Temperature Prediction
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