Work

Matrix Transformer with Integrated Leakage Inductance

Year: 2025

Type: conference-paper

Abstract: Due to the rapid growth of electric aircraft, the need for high-power converters with significant weight reduction has increased. This article proposes a matrix transformer as a solution for isolated DC/DC converters $(270 \mathrm{~V} / 28 \mathrm{~V})$. The matrix transformer enable the integration of leakage inductance through a five-leg magnetic core geometry. Four legs are used for the transformer windings, while the central leg is used for the integration and control of leakage inductance. Two winding structures are analyzed and compared: a configuration with separate primary and secondary windings, and an interleaved winding structure. The structure with lowest magnetic losses and AC resistance is selected. An optimization of the magnetic core geometry is then carried out to achieve the desired leakage inductance value while minimizing losses. The final transformer is designed for an output power of around 1 kW, reaching an efficiency of around $98 \%$.

Source: Global Power, Energy and Communication Conference

DOI: 10.1109/gpecom65896.2025.11061939

Authors: Sanae Mensouri, Fabien Sixdenier, Christian Martin

Institutions: Lyon 1 Université, Centre National de la Recherche Scientifique, Laboratoire Ampère, Institut National des Sciences Appliquées de Lyon

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: green

Funder: Agence Nationale de la Recherche