Modelling, Analysis and Mitigation of the Transformer Current Ringing in Dual Active Bridge Converters

Conference paper (2018)

Authors

Z. Qin DC systems, Energy conversion & Storage - EEMCS
Z. Shen Aalborg University
Frede Blaabjerg Aalborg University
P. Bauer DC systems, Energy conversion & Storage - EEMCS
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
EMI Current ringing Dual active bridge converter Impedance model Parasitic capacitor
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Published Date

2018

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

Due to the parasitic capacitances of the transformer and inductor in Dual Active Bridge (DAB) converters, ringing may happen in the transformer currents especially when the transformer turns ratio is high. This high frequency current ringing may lead to EMI issues. It is found in this paper that the inductor connected on the low voltage side rather than the high voltage side of a DAB converter can help to mitigate the current ringing. The impedance of the magnetic tank is modelled to analyze the current ringing. The analysis is verified on a 2.5 kW DAB prototype.

Files

08558016.pdf
(.pdf | 0.495 Mb)