An equivalent model of the AC-DC converter power circuit for circuit analysis of conductive interference

Abstract: The paper proposes an algorithm for creating an equivalent model of the AC-DC converter power circuit for analyzing the emission of conductive interference in the LTspice circuit mo-deling program using the fast Fourier transform function. The levels of simulated conductive interference are compared for two variants of the line impedance stabilization network. The features of measuring the parameters of the transformer and the components of the input and output filters, as well as their in-troduction into the model of the power circuit, are considered. An experimental study of the model flyback converter model with an output power of 100 watts has been performed. The presented model allows for a preliminary assessment of the level of conductive interference of the converter.

Keywords: ltspice, emc, conductive inter-ference, ac-dc converter, switching power supply