TWELVE-PHASE STEP-UP AUTOTRANSFORMER PHASE CHANGER Russian patent published in 2014 - IPC H02M7/00 H02M7/12 H02M7/48 

FIELD: electricity.

SUBSTANCE: device includes a three-phase autotransformer, having three windings 1, 2, 3 of a primary coil and six windings 4, 5, 6, 7, 8, 9 of secondary coils, six interconnected windings 4, 5, 6, 7, 8, 9 of a primary coil, having taps 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 from windings, the winding 1 of the primary coil of the first phase is connected by its end to a node B, where windings 6 and 8 of the secondary coils of the second phase and third phase are connected; the winding 2 of the primary coil of the second phase is connected by its end to a node D, where the windings 9 and 5 of secondary coils of the third phase and the first phase are connected; the winding 3 of the primary coil of the third phase is connected by its end to a node F, where windings 4 and 7 of secondary coils of the first phase and the second phase are connected; the beginning of the winding 4 of the secondary coil is connected to the beginning of the winding 8 of the secondary coil to form a node A; the end of the winding 8 of the secondary coil is connected to the end of the winding 6 of the secondary coil to form a node B; the beginning of the winding 6 of the secondary coil is connected to the beginning of the winding 5 of the secondary coil to form a node C; the end of the winding 5 of the secondary coil is connected to the end of the winding 9 of the secondary coil to form a node D; the beginning of the winding 9 of the secondary coil is connected to the beginning of the winding 7 of the secondary coil to form a node E; the end of the winding 7 of the secondary coil is connected to the end of the winding 4 of the secondary coil to form a node F and close the loop of windings of the secondary coils forming a "hexagon" A, B, C, D, E, F; each winding of the secondary coil of the autotransformer is a side of the "hexagon" A, B, C, D, E, F, which converts a symmetrical three-phase voltage system to a symmetrical six-phase voltage system.

EFFECT: design of a converter which reduces consumption of active materials while replacing a three-phase transformer with an autotransformer, thereby improving weight and size characteristics of the converter and reducing material cost of its production.

2 dwg