Modeling of Flyback Power Converters Considering the Effect of the Magnetization Core

Nicolás  Muñoz-Galeano; Jesús María  López-Lezama; Juan Bernardo  Cano-Quintero

doi:10.6180/jase.202608_31.059

Modeling of Flyback Power Converters Considering the Effect of the Magnetization Core

Nicolás Muñoz-Galeano, Jesús María López-LezamaThis email address is being protected from spambots. You need JavaScript enabled to view it., and Juan Bernardo Cano-Quintero

Department of Electrical Engineering, Universidad de Antioquia, Medellin, Colombia

Received: October 19, 2025
Accepted: March 4, 2026
Publication Date: March 19, 2026

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202608_31.059

Flyback DC/DC converters are distinguished by the presence of two inductors coupled through a magnetic core, which enables the transfer of energy from the input to the output. This particular configuration gives the Flyback topology unique operational features compared to other power electronic converters. In this work, a newmodeling strategy for Flyback converters is proposed, explicitly considering these distinctive aspects. The formulation is developed through a step-by-step explanation that, to the best of our knowledge, is not documented in existing academic literature or conventional textbooks on power electronics. The operating behavior of the converter is described using an approach grounded in its switching modes and the passive sign convention. This procedure makes it possible to properly define voltage and current reference directions, which are essential for deriving the corresponding differential equations. Additionally, an interpretation of the energy transfer process between the magnetically coupled inductor and the capacitive elements is provided. The resulting mathematical model is implemented and solved using the OpenModelica platform, and its accuracy is assessed through a comparison with a circuit-based simulation carried out in the same software environment.

Keywords: Flyback DC/DC power converters; Power Electronics (PE) devices; Differential Equations; Magnetization Core Effect; OpenModelica

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