DBD tranformerless power supplies: impact of the parasitic capacitances on the power transfer

Mame Andallah Diop (1) , Antoine Belinger (2) , Hubert Piquet (1)

1 LAPLACE-GENESYS - Groupe ENergie Electrique et SYStémique
2 LAPLACE-MPP - Matériaux et Procédés Plasmas

A new transformerless power supply for DBD application is presented here. The power supply is built with 10kV SiC MOSFET. This high voltage switches allow holding the high voltage required by the DBD. An analytical study of the converter's operation is presented to deduce the power transmitted to the DBD. A comparison between the experimental and theoretical electrical waveforms is shown. The experimental waveforms are particularly affected by all the parasitic capacitances. When all the switches are in OFF state, oscillations cause over-voltages across the switches. An analysis of the effect of each capacitance is presented and demonstrates that the parasitic capacitances of the switches and of the inductance play a key role in the actual power transfer.

Mots clés: Parasitic Capacitance; Transformerless; Excimer Lamp; Dielectric Barrier Discharge; DBD

Domaines: Energie électrique

Mame Andallah Diop, Antoine Belinger, Hubert Piquet. DBD tranformerless power supplies: impact of the parasitic capacitances on the power transfer. Journal of Physics: Conference Series, 2017, vol. 825, pp. 012004. ⟨10.1088/1742-6596/825/1/012004⟩. ⟨hal-01515718⟩