Thermal Analysis and Junction Temperature Estimation under Different Ambient Temperatures Considering Convection Thermal Coupling between Power Devices
Source abstract
Abstract
The convection thermal coupling between adjacent power devices in power converters is dependent on the ambient temperature. When the ambient temperature changes, the convection thermal coupling also changes. This results in an inaccurate thermal model that causes errors in the prediction of the thermal distribution and junction temperature based on a fixed ambient temperature for power devices in converters application. To solve this variable-ambient-temperature-related issue, a thermal coupling experiment for semiconductor power devices (the MOSFET and diode) was performed to discuss the influence of the thermal coupling effect between adjacent devices and the FEM (Finite Element Method) thermal models for the power devices considering the convection thermal coupling are established. Through these simulations, the junction temperatures of devices under different ambient temperatures were obtained, and the relationships between the junction temperature and ambient temperatures were established. Moreover, the junction temperatures of power devices under different ambient temperatures were calculated and temperature distributions are analyzed in this paper. This method shows a strong significance and has potential applications for high-efficiency and high-power density converter designs.
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Research context
OpenAlex topics: Silicon Carbide Semiconductor Technologies · Thermal Analysis in Power Transmission · Heat Transfer and Optimization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Automobile and Transportation, Tianjin University of Technology and Education, 1310 Dagu South Road, Hexi District, Tianjin 300222, China
State Key Laboratory of Engines, Tianjin University, 135 Ya Guan Road, Jinnan District, Tianjin 300350, China
College of Science & Engineering, James Cook University, 1 James Cook Drive, Townsville Queensland, Cairns 4811, Australia
Funding
Tianjin Municipal Education Commission Scientific Research Program · Tianjin Science and Technology Plan Project · Tianjin University
References (34)
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