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

Valentin Rigot (1, 2) , Tanguy Phulpin (1) , Jihen Sakly (2) , Daniel Sadarnac (1)

1 GeePs - Laboratoire Génie électrique et électronique de Paris
2 VeDeCom - VEhicule DEcarboné et COmmuniquant et sa Mobilité

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.

Mots clés: Rigot; V.; Phulpin; T.; Sakly; J.; Sadarnac; D. A New 7 kW Air-Core Transformer at 1.5 MHz for Embedded Isolated DC/DC Application. Energies 2022; 15; 5211 air-core transformer; high frequency; passive devices; power converter; automotive application

Domaines: Electronique

Valentin Rigot, Tanguy Phulpin, Jihen Sakly, Daniel Sadarnac. A New 7 kW Air-Core Transformer at 1.5 MHz for Embedded Isolated DC/DC Application. Energies, 2022, 15 (14), pp.5211. ⟨10.3390/en15145211⟩. ⟨hal-03727221⟩