Current control for dc-dc converters

A method for operating an at least three-phase DC-DC converter having a primary side comprising at least three actively switched primary voltage bridges with several active switches for converting a DC input voltage into primary alternating voltages for each of the primary voltage bridges, and having a secondary side comprising at least three actively switched secondary voltage bridges with several active switches for converting the secondary alternating voltages into a shared DC output voltage for each of the secondary voltage bridges, whereby each of the primary voltage bridges is coupled to one of the secondary voltage bridges via a multi-phase transformer, or via particular a transformer to particular one phase, whereby the primary and secondary alternating voltages are shifted by a phase angle φ with a period T, said method comprising the steps of setting the phase angle φ from a first phase angle φ1 to a second phase angle φ2 as the switching operation for transferring power from the primary side to the secondary side, whereby the primary and secondary voltage bridges are switched during the switching operation in such a way that the phase angles φ of the individual phases are set independently of each other during the switching operation.