TWELVE/TEN/EIGHT-POLE-CHANGING WINDING Russian patent published in 2003 - IPC

FIELD: electrical engineering; electrical machines; three-speed motors. SUBSTANCE: pole-changing winding has 36 coil groups with coils alternating in groups as follows: 2K, 3K, 2K, 2K, 2K, 3K, 2K, 1K, 1K, 2K, 3K, 2K, 2K, 2K, 3K, 2K, 1K, 1K, 2K, 3K, 2K, 2K, 2K, 3K, 2K, 1K, 1K, 2K, 3K, 2K, 2K, 2K, 3K, 2K 1K, 1K, where K is integer number; finish of coil group 1 is connected to finish of coil group 4, start of 4, to start of 7, start of 10, to start of 13, finish of 13, to finish of 16, finish of 19, to finish of 22, start of 22, to start of 25; start of 2, to start of 5, finish of 5, to finish of 9, finish of 11, to finish of 14, start of 14, to start of 18, start of 20, to start of 23, finish of 23, to finish of 27, finish of 29, to finish of 32, start of 32, to finish of 36, start of 35, to start of 3, finish of 3, to finish of 6, finish of 8, to finish of 12, start of 12, to start of 15, start of 17, to start of 21, finish of 21, to finish of 24, finish of 26, to finish of 30, and start of 30, to start of 33; terminal lead 37 is formed by interconnected finish of coil group 35 and start of group 34, terminal lead 38, by interconnected starts of groups 1 and 26, terminal lead 39, by interconnected finishes of groups 2 and 34, terminal lead 40, by interconnected starts of groups 6 and 8, terminal lead 41, by interconnected finishes of groups 7 and 10, terminal lead 42, by interconnected starts of groups 9 and 11, terminal lead 43, by interconnected finishes of groups 17 and 15, terminal lead 44, by interconnected finishes of groups 19 and 16, terminal lead 45, by interconnected finishes of groups 20 and 18, , terminal lead 46, by interconnected starts of groups 26, 24, and terminal lead 48, by interconnected starts of coil groups 29, 27. Twelve-pole winding is obtained by applying voltage to terminal leads 37, 38, 39. For tenpole arrangement voltage should be applied to terminal leads 43, 44, 45 with terminal leads 37, 38, 39 being interconnected. Applying voltage to interconnected pairs of terminal leads 40 and 46, 41 and 47, 42 and 48, with terminal leads 37, 38, 39, 43, 44, 45 being interconnected, will give eight-pole winding. EFFECT: enhanced number of changeable poles; enlarged functional capabilities of winding. 1 cl, 7 dwg