Thermal Management and Cooling Design of DC/DC Converters for Vehicle Applications

Student thesis: Master's Thesis


Thermal management is a key design aspect of power converters since it determines reliability, durability as well as the performance and power density. A critical challenge in power electronics design is removing the heat caused by losses from the power devices. Several studies have been conducted to determine the importance of cooling technologies in the field of power electronics.
In this thesis, an overview and classification of the main thermal management and thermal modelling techniques are presented. This thesis concentrates on an indirect liquid cooling system for a non-isolated interleaved bidirectional converter with two different semiconductor devices: SiC MOSFET and Si IGBT.
The thesis develops two models: an electro-thermal network and a numerical model in ANSYS AIM. Two hardware prototypes of the converter, including the cooling system, have been constructed for experimental testing. The validation between the simulation and experimental results indicates that the electro-thermal model has the fastest calculation time and gives accurate results. Meanwhile, the simulation on the numerical model highly relies on the inputs’ accuracy, which leads to many different simulation results.
Date of Award2020
Original languageEnglish

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