Conducted EMI reduction in a 100kW 1.2kV Dual Active Bridge converter

Hadiseh Geramirad (1, 2) , Florent Morel (1) , Piotr Dworakowski (1) , Bruno Lefebvre (1) , Thomas Lagier (1) , Philippe Camail (1) , Christian Vollaire (2, 1) , Arnaud Bréard (2)

1 SuperGrid Institute SAS
2 MIS - Ampère, Département Méthodes pour l'Ingénierie des Systèmes

Medium-frequency transformer is one of the key components of isolated power electronic converters. The parasitic capacitances of the transformer provide paths for the common-mode current inside the converter. The electromagnetic interferences due to fast switching are among the main concerns for the design of SiC MOSFET based power converters. The conducted emissions of the converter are directly linked to its physical layout. In this work, the main loops of the common-mode current in the presence of a 3-phase medium-frequency transformer are discussed. The experimental studies show the effects of the transformer construction and vector group (star/delta) on the common-mode currents through the gate drivers of SiC MOSFETs in a 100kW 1.2kV three-phase dual active bridge converter.

Domaines: Sciences de l'ingénieur [physics]; Energie électrique; Electronique; Electromagnétisme

Hadiseh Geramirad, Florent Morel, Piotr Dworakowski, Bruno Lefebvre, Thomas Lagier, et al.. Conducted EMI reduction in a 100kW 1.2kV Dual Active Bridge converter. PCIM Europe digital days 2020, Jul 2020, Virtual, Germany. ⟨hal-02942284v2⟩