TEN-TO-FOUR-TO-TWO POLE-CHANGEABLE WINDING Russian patent published in 2003 - IPC

FIELD: electrical engineering; electrical machines including triple-speed motors. SUBSTANCE: winding has 18 coil groups numbered 1 through 18 and terminal leads numbered 19 through 27. In phase 1 (i = 1) finish of coil- group 1 is connected to start of group 5, finish of group 5, to finish of group 10, start of group 10, to finish of group 14, finish of group 3, to finish of group 2; in second phase (i = 2) finish of coil-group 7 is connected to start of coil group 11, finish of group 11, to finish of group 16, start of group 16, to finish of group 2, finish of group 9, to finish of group 18; in third phase (i = 3) finish of coil-group 13 is connected to start of coil group 17, finish of group 17, to finish of group 4, start of group 4, to finish of group 8, finish of group 15, to finish of group 6; to terminal leads, from start of coil group 2, from start of coil group 8, from start of coil group 14, from finish of coil group 3, from finish of coil group 9, from finish of coil group 15, from integrated starts of coil groups 18, 1, 3, from integrated starts of coil groups 6, 7, 9, and from integrated starts of coil groups 12, 13, 15. Applying voltage to terminal leads 20, 23, 26 affords ten-pole winding with star-data connection of phases. If voltage is applied to terminal leads 19, 22, 25 and leads 21, 24, 27 are integrated, we have four-pole winding with star-star connection of phases. To obtain two-pole winding voltage should be applied to terminal leads 21, 24, 27 and leads 20, 23, 26 should be integrated, phases being connected in star-data circuit. EFFECT: enlarged functional capabilities of motor, simplified switching circuit arrangement. 1 cl, 4 dwg