TWELVE-PULSE VOLTAGE TRANSFORMER CONVERTER Russian patent published in 2014 - IPC H02M7/08 

FIELD: electricity.

SUBSTANCE: at connecting of the three-phase transformer to a three-phase network in the rods of the transformer magnetic circuit three magnetic fluxes phase-shifted from each other by a one-third of the period occur. The execution of secondary winding for each phase as two coils on the rod of each phase allows to obtain two secondary voltages with opposite polarity. Thus, for three network voltages phase-shifted by 120 degrees, six secondary voltages phase-shifted from each other by 60 degrees are obtained. Thus, for three voltages of the network phase-shifted by 120 degrees, six secondary voltages phase-shifted by 60 degrees are obtained. When connecting six coils of secondary windings according to the description given above, six-phase "hexagon" ABCDEF with symmetric six-phase system of voltages on coils of the secondary winding is obtained.

EFFECT: reduction of active materials consumption at replacement of three-phase group transformer by three-leg transformer.

2 dwg