Symmetric buck circuit for electrically excited synchronous machine

A system comprising a power converter, wherein the power converter includes:

• a first switch including a first connection and a second connection, wherein the first connection of the first switch is configured to be connected to a positive voltage node;
• a second switch including a first connection and a second connection, wherein the first connection of the second switch is configured to be connected to a negative voltage node;
• and
• a third switch including a first connection and a second connection, wherein the first connection of the third switch is connected to the second connection of the first switch and the second connection of the third switch is connected to the second connection of the second switch,
• wherein the second connection of the first switch is configured to be connected to a first end of a rotor winding, and the second connection of the second switch is configured to be connected to a second end of the rotor winding.