Abstract
The paper analyses the influence of the size, the shape and the ferromagnetic material which is used to make a ferromagnetic core on thermal parameters of an inductor. The investigations were carried out for: inductors containing toroidal cores made of the ferrite F867 materials with the different outer diameter, for toroidal cores made of different materials, such as the ferrite SM −100 and the powdered iron (−26), (−52) with the same outer diameter, and for cores made of F867 materials with the same value of effective volume, but different shapes, such as: a U-core and a cup core. The method of measurements and the results of investigations for selected ferromagnetic cores are presented. The obtained results show that various factors mentioned earlier have a significant influence on thermal parameters of an inductor and it is reasonable to formulate a nonlinear compact thermal model of an inductor using the measurement results presented in this paper.
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