Dr Dan Rogers, Cardiff University
This project focuses on the design of reliable yet efficient thermal models, underpinning an optimal design framework for power electronic converters. Due to the high number of times that these models must be evaluated during the optimisation process, such models are required to be of low computational cost (so-called ‘optimisable’). The project is embedded in a wider design optimisation framework, aligning with the CPE’s cross-theme topic ‘Design Tools and Modelling’.
A simplified physical model of a second order filter intended for thermal modelling is shown in Fig. 1. This, together with a set of assumptions regarding the behaviour of the heatsink, allows efficient axisymmetric modelling (Fig. 2). The project will seek to progressively increase the accuracy of the optimisable models by relaxation of the simplifying assumptions whilst ensuring a reasonable computational cost is maintained. Accuracy of the optimisable models will be assessed using much more computationally expensive three dimensional simulations.