POWER SUPPLY FOR SPLIT-PHASE INDUCTIVE-RESISTIVE LOADS AFFORDING SYMMETRY OF PRIMARY THREE-PHASE NETWORK Russian patent published in 2006 - IPC H02M5/14 H01F30/12 

FIELD: electrical engineering and transformer building.

SUBSTANCE: proposed power supply designed for three-phase current and voltage conversion has magnetic circuit assembled of three cores A, B, and C of equal cross-sectional area, three-phase primary winding, sectionalizing switch, three-phase network, and secondary winding designed so that each magnetic core mounts two partial windings with unequal turn number; partial windings of each magnetic core bearing same index have equal turn number: Wa1x1 = Wb1y1= Wc1z1 and Wa2x2 = Wb2y2 = Wc2z2; secondary-winding parts are connected in series as follows: Wa1x1 winding is connected to Wc1z1 so that lead a1 is coupled with lead c1. Winding Wa2x2 is connected to Wb1y1, Wb2y2, and Wc2z2. Lead a2 is connected to lead b1, lead y1, to lead b2, and lead y2, to lead x2, split-phase balanced load being connected to leads c2 and z1 with center tap on common lead x1-x2.

EFFECT: simplified design, enhanced performance characteristics.

1 cl, 1 dwg