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Analytical thermal model for magnetic components

1D thermal models are often used in the design of magnetic components in order to obtain an optimum design for a specific application. These thermal resistor-based models usually consider a thermal network based on the analogy between electricity and heat transfer equations. These models consider heat transfer in axial or radial direction using different electric elements, and using this analogy, model heat transfer through each object. Usually, convection and radiation effects are not taken into account when there is an enclosure. If temperatures become higher, these effects may become important. This work presents a procedure to model heat transfer in a magnetic components considering convection and radiation heat transfer in the window air area. Comparisons with finite element analysis are carried out in order to show the accuracy of the proposed method. The model that is presented is nonlinear. Therefore, a numerical method is shown in order to obtain the solution of the model using an iterative algorithm.