TEN-TO-SIX POLE CHANGING (DOUBLE-PITCH) WINDING Russian patent published in 2001 - IPC

FIELD: electrical engineering; dual-speed motors. SUBSTANCE: winding has all its coils assembled into 36 coil groups where coil-group finishing lead 1 is connected to finishing lead 6; starting lead 6, to finishing lead 19; starting lead 19, to starting lead 24; finishing 5, to finishing lead 10; starting 10, to finishing lead 23; starting lead 23, to starting lead 28, finishing lead 9, to finishing lead 14; starting lead 14, to finishing lead 27; starting lead 2, to starting lead 32; finishing lead 13, to finishing lead 18, starting lead 18, to finishing 31; starting lead 31, to starting lead 36; finishing lead 17, to finishing lead 22; starting lead 22, to finishing lead 35; starting lead 35, to starting lead 4; finishing lead 21, to finishing lead 26; starting lead 26, to finishing lead 3; starting lead 3, to starting lead 8; finishing lead 25, to finishing lead 30; starting lead 30, to finishing lead 7; starting lead 7, to starting lead 12; finishing lead 29, to finishing lead 34; starting lead 34, to finishing lead 11; starting lead 11, to starting lead 16; finishing lead 33, to finishing lead 2; starting lead 2, to finishing lead 15; starting lead 15, to starting lead 20; finishing leads 36, 4, 8 of coil groups and finishing leads 12, 16, 20 of coil groups are interconnected into neutral points; terminal leads are brought out from starting leads 1, 5, 9, 13, 17, 21, 25, 29, 33. Applying voltage to interconnected leads 37, 40, 43; 38, 41, 44; and 39, 42, 45 provides for six-pole star-star-star connection of motor. Applying voltage to leads 38, 41, 44 and interconnecting lead 39 with lead 40 , lead 42 with lead 43, and lead 45 with lead 37 gives ten-pole star-delta connection which provides for better characteristics of magnetomotive forces. EFFECT: enhanced winding factor providing for more effective utilization of motor dimensions. 5 dwg