TWELVE-TO-EIGHT POLE CHANGING WINDING Russian patent published in 2002 - IPC

FIELD: electrical engineering; variable-speed electrical machines. SUBSTANCE: winding has 36 coil groups, coil alternation within groups being 2K, 3K, 2K, 2K, 2K, 3K, 2K, 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; coil-group finishing lead 1 is connected with coil-group finishing lead 4, starting lead 4, with starting lead 7, finishing lead 7, with starting lead 19, finishing lead 19, with finishing lead 22, starting lead 22, with starting lead 25, starting lead 10, with starting lead 13, finishing lead 13, with finishing lead 16, starting lead 16, with finishing lead 28, starting lead 28, with starting lead 31, finishing lead 31, with finishing lead 34, starting lead 2, with starting lead 5, finishing lead 5, with finishing lead 9, starting lead 9, with finishing lead 20, starting lead 20, with starting lead 23, finishing lead 23, with finishing lead 27, finishing lead 11, with finishing lead 14, starting lead 14, with starting lead 18, finishing lead 18, with starting lead 29, finishing lead 29, with finishing lead 32, starting lead 32, with starting lead 36, starting lead 35, with starting lead 3, finishing lead 3, with finishing lead 6, starting lead 6, with finishing lead 17, starting lead 17, with starting lead 21, finishing lead 21, with finishing lead 24, finishing lead 8, with finishing lead 12, starting lead 12, with starting lead 15, finishing lead 15, with starting lead 26, finishing lead 26, with finishing lead 30, starting lead 30, with starting lead 33; interconnection of finishing leads 35 and 36 forms lead 37; interconnection of starting lead 1 and finishing lead 33 forms lead 38; interconnection of finishing lead 2 and starting lead 34 forms lead 39; interconnection of starting leads 8 and 24 forms lead 40; interconnection of finishing leads 25 and 10 forms lead 41; interconnection of starting leads 27 and 11 forms lead 42. Applying voltage across leads 40, 41, 42 forms 12-pole winding. If voltage is applied across leads 40, 41, 42 and leads 37, 38, 39 are interconnected, 8-pole winding is obtained. EFFECT: enlarged number of winding poles that can be changed over. 5 dwg