A New 7 kW Air-Core Transformer at 1.5 MHz for Embedded Isolated DC/DC Application

Valentin Rigot, Tanguy Phulpin, Jihen Sakly and Daniel Sadarnac
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Valentin Rigot: Laboratoire de Génie Electrique et Electronique de Paris, CNRS, CentraleSupélec, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
Tanguy Phulpin: Laboratoire de Génie Electrique et Electronique de Paris, CNRS, CentraleSupélec, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
Jihen Sakly: Vedecom, 23 bis Allée des Marronniers, 78000 Versailles, France
Daniel Sadarnac: Laboratoire de Génie Electrique et Electronique de Paris, CNRS, CentraleSupélec, Université Paris-Saclay, 91190 Gif-sur-Yvette, France

Energies, 2022, vol. 15, issue 14, 1-16

Abstract: This paper presents the study of air-core transformers for electric vehicles, developing them for medium-power (tens of kWs) converter applications specifically used at a high frequency. Air-core transformers have the advantage of lacking magnetic saturation and iron losses, making them suitable for high-frequency applications. We designed and manufactured a transformer for a determined frequency and inductance value. The design of this passive component aims to both keep the magnetic field inside the transformer and manage the thermal energy efficiently. The electrical, magnetic, and thermal properties are simulated and then verified by experiments with a specific test bench. The transformer reaches high performances for a higher frequency than usual for an equivalent power transfer in automotive applications.

Keywords: air-core transformer; high frequency; passive devices; power converter; automotive application (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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