A Multi-Condition-Based Junction Temperature Estimation Technology for Double-Sided Cooled Insulated-Gate Bipolar Transistor Modules

Mengfan Chen (), Guangyin Lei (), Min Li, Shouzhong Chang, Sirui Wu and Huichuang Bao
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Mengfan Chen: Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Guangyin Lei: Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Min Li: Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Shouzhong Chang: Leadrive Technology (Shanghai) Co., Ltd., Shanghai 201315, China
Sirui Wu: Leadrive Technology (Shanghai) Co., Ltd., Shanghai 201315, China
Huichuang Bao: Leadrive Technology (Shanghai) Co., Ltd., Shanghai 201315, China

Energies, 2025, vol. 18, issue 7, 1-23

Abstract: A method considering thermal boundary conditions and thermal coupling effects is proposed to estimate the junction temperature of double-sided cooling insulated-gate bipolar transistor (IGBT) modules. Traditional methods, which rely on negative temperature coefficient (NTC) measurements, often overlook mutual thermal interactions among chips, leading to inaccuracies under varying cooling boundary conditions. In this paper, a Foster thermal network model incorporating chip thermal coupling is developed to estimate the junction temperature of double-sided cooling IGBT power modules. The thermal model parameters are extracted through a combination of finite element simulation and experimental analysis. The effects of different cooling boundary conditions on the thermal model and the module’s heat channeling behavior are examined, and compensation strategies for various cooling boundaries are proposed. Experimental and simulation results indicate that the estimated junction temperature error of the proposed method remains within 5 °C under different operating conditions.

Keywords: double-sided-cooling IGBT; foster thermal network model; thermal coupling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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