University of Twente Student Theses
Advanced Thermal Modelling of Magnetic Components
Savca, Alexandru (2024) Advanced Thermal Modelling of Magnetic Components.
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| Abstract: | Tools for the optimization of magnetic components require thermal models of high execution speed and sufficient accuracy. Currently, most tools use models based on thermal networks or simplifications involving 1D and 2D cross-sections. These models are often fast but have limited accuracy in average and maximum component temperature. In this work, we present extremely coarse 3D thermal finite-element (FE) models specifically developed for magnetic cores, offering a highly attractive combination of speed and accuracy, and retaining the essential physics of the heat-transfer processes involved. Different models are implemented in MATLAB and benchmarked against fine-mesh FE models from COMSOL. Both thermally isotropic (bulk material, ferrite) and anisotropic (tape-wound, nanocrystalline or amorphous) cores are studied. The best model, based on three second-order elements, achieves errors in average and maximum temperatures within 1.25 % for isotropic and anisotropic cores. The execution time of the models is within 0.28ms on a standard laptop, making them an excellent choice for expensive sweeping of design spaces in optimization. |
| Item Type: | Essay (Master) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Subject: | 53 electrotechnology |
| Programme: | Electrical Engineering MSc (60353) |
| Link to this item: | https://purl.utwente.nl/essays/103735 |
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