Method for operating a power converter and power con-verter

A power converter, comprising:

• three input nodes each configured to receive a respective one of three alternating input voltages, and an output;
• three transformers each comprising a first winding and a second winding inductively coupled with the first winding;
• an input circuit with three input stages each coupled to a respective one of the input nodes, the primary winding of a respective one of the transformers and a common circuit node;
• an output circuit coupled to the second winding of each of the transformers and the output;
• and
• a control circuit configured to
• detect that one of the input voltages having the lowest magnitude to obtain a lowest input voltage,
• operate the input stage connected to that one of the input nodes receiving the lowest input voltage such that the one of the input nodes receiving the lowest input voltage is connected to the common circuit node, and
• operate the other input stages in a switched mode in order to generate alternating voltages across the first windings connected the other input stages.

A method comprising:

• monitoring operation of a power converter, the power converter including multiple input nodes;
• in response to detecting a lowest magnitude input voltage at a first input node of the multiple of the nodes, connecting the first input node receiving the lowest magnitude input voltage to a common circuit node of the power converter via a first input stage connected to the first input node receiving the lowest input voltage, the first input stage being one of multiple input stages of the power converter;
• and
• via operating a group of input stages of the power converter excluding the first input stage in a switched mode, generating alternating voltages across first windings of the power converter connected the group of input stages excluding the first input stage.