Design of coils for high-power medium-frequency transformers using Grain-Oriented hot cores - Université d'Artois
Article Dans Une Revue International Journal of Applied Electromagnetics and Mechanics Année : 2024

Design of coils for high-power medium-frequency transformers using Grain-Oriented hot cores

Résumé

This article proposes a design of windings for medium-frequency transformers (MFTs) at the heart of high-power Solid-State Transformers (SSTs). With aluminum interleaved foils of the correct thicknesses, it is possible to obtain low winding losses and a very low leakage inductance well adapted to high-power SSTs able to operate in the medium-voltage grid (5–20 kV). The MFT equivalent resistance and leakage inductance are determined using an analytical model based on Dowell’s hypotheses. Several interleaved winding configurations are analyzed and compared to the standard structure made of two concentric foil coils. The experimental validation is made with short-circuit tests of an MFT fed by a low-level square voltage source at several kHz, which can provide the necessary high current.
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Dates et versions

hal-04808373 , version 1 (12-12-2024)

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Daniel Roger, Mathieu Rossi, Krzysztof Komeza, Ewa Napieralska, Jérôme Cambier. Design of coils for high-power medium-frequency transformers using Grain-Oriented hot cores. International Journal of Applied Electromagnetics and Mechanics, 2024, International Journal of Applied Electromagnetics and Mechanics, 76 (1-2), pp.121-133. ⟨10.3233/JAE-230404⟩. ⟨hal-04808373⟩

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