Estimation of Accurate IGBT Junction Temperature is Crucial for Reliability Assessment. the Well-Known RC Lumped Approach Can Help Predict Junction Temperature. However, This Method Suffers from Inaccuracy While Characterizing the Thermal Behavior of Several IGBT Modules Mounted to the Liquid-Cooled Heatsink. Specifically, the Thermal Challenge Originates from the Thermal Cross-Coupling and Module-To-Module Heat Spreading and the Converter Cooling Condition. This Article Demonstrates a Methodology to Study the Impact of Heat Spreading, Thermal Interface Material, and Massive Size Liquid Cold-Plate on the overall Thermal Behavior. a Case Study of 50 KW Traction Inverter is Chosen to Demonstrate the Benefit of Early Assessment of Electro-Thermal Simulation Before Making Costly Prototype Design. Power Loss is Initially Estimated using an Analytical Loss Model and Later the Estimated Power Loss is Used in FEA (Finite Element Analysis) Thermal Model. This Paper Also Compares the Performance of Single-Phase and Two-Phase Liquid Cooling and Various Thermal Interface Materials (TIM) to Determine Which Type of Cooling System and TIM is Most Suitable for Real Applications. Simulation Results Suggest that Combination of Two-Phase Liquid Cooling and TIM Can Improve the Thermal Performance and Reduce Junction Temperature by 4.5%, 4.2%, 4.6% for the Traction Power Load 30 KW, 40 KW, and 50 KW, respectively. the Proposed Methodology Can Be Used as Useful Reference Guidance for Thermal Design and Modelling of IGBT based Power Converter Applications.
M. Shahjalal et al., "Thermal Analysis of Si-IGBT based Power Electronic Modules in 50kW Traction Inverter Application," e-Prime - Advances in Electrical Engineering, Electronics and Energy, vol. 3, article no. 100112, Elsevier, Mar 2023.
The definitive version is available at https://doi.org/10.1016/j.prime.2023.100112
Nuclear Engineering and Radiation Science
Keywords and Phrases
FEA thermal model; IGBT power module; Liquid cold plate; Thermal management; Traction inverter
International Standard Serial Number (ISSN)
Article - Journal
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01 Mar 2023