Patent ID: 8339820

Claim:
A power circuit, comprising: a first rectifier circuit comprising: a first transformer having 15 inductors coupled in series, the inductors joined by 15 nodes interposed between pairs of the inductors, wherein the inductors from the first transformer form a first hexagon, the first hexagon having first, second, third, fourth, fifth, and sixth vertices and alternating sides comprising 2 and 3 inductors, respectively, wherein the first vertex opposes the second vertex, the third vertex opposes the fourth vertex, and the fifth vertex opposes the sixth vertex; and a first set of nine outputs for nine-phase AC power, wherein each output of the first set is coupled to a respective node of the first hexagon that is not a vertex of the first hexagon and coupled to a first diode bridge; a second rectifier circuit coupled in parallel with the first rectifier circuit, wherein the second rectifier circuit comprises: a second transformer having 15 inductors coupled in series, the inductors joined by 15 nodes interposed between pairs of the inductors, wherein the inductors of the second transformer form a second hexagon, the second hexagon having first, second, third, fourth, fifth, and sixth vertices located in the same relative positions as the vertices of the first hexagon and having alternating sides comprising 2 and 3 inductors, respectively; and a second set of nine outputs for nine-phase AC power, wherein each output of the second set is coupled to a respective node of the second hexagon that is not a vertex of the second hexagon and coupled to a second diode bridge; a first, second, and third AC input configured to couple to a first, second, and third phase output of an AC power source, respectively, wherein the first input is configured to couple to the first vertex of the first hexagon and to the second vertex of the second hexagon, wherein the second input is configured to couple to the third vertex of the first hexagon and to the fourth vertex of the second hexagon, and wherein the third input is configured to couple to the fifth vertex of the first hexagon and to the sixth vertex of the second hexagon; and a DC bus coupled to outputs of the first and second diode bridges of the first and second rectifier circuits.