Patent ID: 7307361

Claim:
A medium voltage power converter, comprising: an input transformer having a primary winding circuit and a plurality of secondary winding circuits, said primary winding circuit being adapted to connect to a multi-phase AC power source, each secondary winding circuit having three or more phase-shifted outputs; a plurality of low voltage drives, each low voltage drive having a plurality of power inputs and a plurality of power outputs, each power input being operatively connected to a corresponding one of the phase-shifted outputs of a respective one of the secondary winding circuits, each power output being operatively connected to a respective one of the power inputs such that each power output is adapted to provide a current substantially in-phase with the respective one power input; and an output transformer having a plurality of input primary winding circuits, a plurality of output secondary winding circuits, and a secondary winding connection arrangement having a plurality of phase-shifted outputs, each of the input primary winding circuits having a plurality of input primary windings, each input primary winding being operatively connected to a respective one of the power outputs of a respective one of the low voltage drives, each output secondary winding circuit having a plurality of output secondary windings, each output secondary winding disposed in relation to a respective one of the input primary windings; wherein each phase-shifted output of the secondary winding connection arrangement is operatively connected to one of the output secondary windings of each output secondary winding circuit.