Active magnetic bearing controller

A power converter electrically coupled to an active magnetic bearing (AMB) having a plurality of windings, the power converter comprising:

• a DC bus having a positive rail and a negative rail;
• two capacitors electrically coupled in series between the positive rail and negative rail, one capacitor being electrically coupled to the other capacitor at a midpoint connection;
• a first leg electrically coupled between the positive rail and the negative rail, the first leg comprising a first semiconductor switching device electrically connected between the positive rail and a first output node;
• a second leg electrically coupled between the positive rail and the negative rail, the second leg comprising a second semiconductor switching device electrically connected between the negative rail and a second output node;
• and
• a switch controller electrically coupled to the first semiconductor switching device and the second semiconductor switching device,
• wherein, the first output node is electrically coupled to the midpoint connection by way of a first AMB winding, and
• wherein, the second output node is electrically coupled to the midpoint connection by way of a second AMB winding.