EIGHT-TO-FOUR POLE CHANGING STATOR WINDING Russian patent published in 2005 - IPC

FIELD: electrical engineering; multispeed motors using simple pole-changing circuit arrangement.

SUBSTANCE: proposed stator winding has 18 coil groups of main winding numbered 1 through 18, with phase leads brought out of coil groups 3, 9, and 15 and six additional groups of single-layer four-pole winding numbered 22 through 27 with phase leads brought out of starting leads of coil groups 23, 25, and 27; finishing lead of coil group 1 is connected to starting lead of coil group 10, finishing lead of coil group 3, to starting lead of coil group 12, finishing lead of coil group 5, to starting lead of coil group 14, finishing lead of coil group 7, to starting lead of coil group 16, finishing lead of coil group 9, to starting lead of coil group 18, finishing lead of coil group 11, to starting lead of coil group 2, finishing lead of coil group 13, to starting lead of coil group 4, finishing lead of coil group 15, to starting lead of coil group 6, finishing lead of coil group 17, to starting lead of coil group 8; separately interconnected are finishing leads of coil groups 4, 6, 8, finishing leads of coil groups 10, 12, 14, and finishing leads of coil groups 16, 18, 2; interconnected starting leads of coil groups 5 and 7 are connected to finishing lead of coil group 26, interconnected starting leads of coil groups 11 and 13, to finishing lead of coil group 22, interconnected starting leads of coil groups 17 and 1, to finishing lead of coil group 24, finishing lead of coil group 23, to starting lead of coil group 26, finishing lead of coil group 25, to starting lead of coil group 22, finishing lead of coil group 27, to starting lead of coil group 24; starting lead of coil group 3 and that of coil group 23 are disposed in same slot.

EFFECT: simplified pole-changing circuit arrangement and enlarged functional capabilities of winding.

1 cl, 4 dwg