TRANSFORMER WITH THREE-PHASE AND CIRCULAR WINDINGS Russian patent published in 2015 - IPC H01F38/18 

FIELD: electricity.

SUBSTANCE: transformer with three-phase and circular windings is formed of two parts: outer and inner magnet cores containing different number of semi-closed slots, not multiple to each other. The slots are made to full height of coil groups. The three-phase and circular windings are placed in grooved slots of inner and outer magnet cores respectively and made as drum-type double-layer winding of the coil height, they have fractional number of slots per a pole and phase and shortened pitch. Magnetic axis of the circular winding is inclined towards magnetic axis of the three-phase winding per one slot pitch of inner or outer magnet core.

EFFECT: increased efficiency and power factor, suppression of higher spatial harmonic components of magnetic field, reduced consumption of material due to improved cooling.

7 dwg