DC-TO-DC CONVERTER COMPRISING A TRANSFORMER

摘要

The invention relates to a DC-to-DC converter, to a DC voltage network comprising a DC-to-DC converter and to a method for operating a DC voltage network comprising a DC-to-DC converter, the DC-to-DC converter comprising a circuit arrangement with two bridge circuits with semiconductor switches and a transformer arranged between the bridge circuits. The transformer is provided with a tap changer which allows the transformation ratio to be adjusted. The selection of the transformation ratio allows the soft-switching range of the dual active bridge to be increased to that of a DC-to-DC converter. This allows purely capacitive snubbers to be used as snubbers, thus reducing switching losses.