POLE-CHANGING WINDING Russian patent published in 2004 - IPC

FIELD: electrical engineering; dual-speed induction motors for driving large fans and the like.

SUBSTANCE: proposed pole-changing winding that ensures pole changing ratio of 2/16 at enlarged slot number of stator slots in motor stator has 48 coil groups with coil numbers in groups alternating in sequence 1, 1, 2, 2, 1, 1, 2, 2 …, two halves in each of three phase windings with differentially connected coil groups in phase winding halves and with cumulatively interconnected halves of phase windings; first half of phase winding includes coil groups numbered 8i - 7, 8i - 4, 8i - 1, 8i + 17, 8i + 20, 8i + 23, 8i + 26; second half of phase winding includes coil groups numbered 8i + 29, 8i + 32, 8i + 45, 8i + 38, 8i + 5, 8i + 8, 8i + 11, 8i + 14; coil leads are taken from starting leads of 8i - 7, 8i + 26; finishing leads of coil groups 8i + 14 are interconnected in neutral point, where i = 1, 2, 3.

EFFECT: enlarged functional capabilities of winding.

1 cl, 2 dwg