INFLUENCE OF INDUCED CURRENTS IN CONDUCTORS ON LEAKAGE AND LOSSES IN A TRANSFORMER

ABSTRACT

The precision of the classical equivalent circuit of a transformer is not sufficient for the software simulation of a high frequency power supply to be true. In this paper we show that, by adding some components to the classical circuit, eddy currents in windings can be taken into account. First, this modification was deduced from experimental results. Then, thanks to an homogeneous layer model, an analytical study was carried out. This enabled the above circuit to be justified and expressions to be derived for the supplementary components values. Finally, a more exact geometry was investigated thanks to an electromagnetic software simulation. The corresponding results agree well with analytical and experimental ones.