The compact thermal model of the pulse transformer

The paper proposes the form of the compact thermal model of the pulse transformer. This model takes into account self-heating and mutual thermal coupling between the windings and the core of the transformer. It allows the calculation of the time runs of the core and windings temperature at a known run of the power dissipated in the particular components in the transformer. The proposed model has a form of a RC network, representing the transformer´s own and mutual transient thermal impedance. This network is excited by controlled current sources, representing the power dissipated in the windings and in the core of the transformer. The form of the elaborated thermal model, a method of determining the values of its parameters and the selected results of measurements and calculations performed with the use of the model are presented and discussed.