**4. Results**

In order to analyse influence of the dimensions and the shape of the core on parameters of a non-linear thermal model of the inductor, investigations of the considered component operating in the set-up presented in Figure 2 were performed. Measurements were carried out for inductors with ferrite cores of different shapes and dimensions.

In subsection A the tested inductors are described, in subsection B presents the estimated values of model parameters, and in subsection C, the obtained results of calculations and measurements are presented. On the basis of the obtained results dependences of influence of the mentioned factors on the value of parameters of the presented nonlinear thermal model of the inductor are discussed.
