Patent ID: 8243481

Claim:
A power circuit, comprising: first and second rectifier circuits coupled in parallel with one another, wherein the first rectifier circuit is configured in a positive manner and the second rectifier circuit is configured in a negative manner, and wherein each rectifier circuit comprises: a transformer having 15 series coupled inductors joined by 15 nodes interposed between pairs of the inductors and represented as a hexagon in which alternating sides comprise 2 and 3 inductors, respectively, three inputs corresponding to three-phase AC power coupled to alternating vertices of the hexagon, wherein the inputs are configured to couple to a first set of vertices of a first hexagon in the first rectifier circuit and to a second set of vertices of a second hexagon in the second rectifier circuit, wherein each vertex in the first set of vertices of the first hexagon is located at a different position with respect to each corresponding vertex in the second set of vertices of the second hexagon, and nine outputs for nine-phase AC power coupled between each node that is not a vertex of the hexagon and a respective diode bridge; a DC bus coupled to outputs of the diode bridges of the first and second rectifier circuits; and means for reducing circulating current between the rectifier circuits and for promoting load sharing between the rectifier circuits.