EIGHT/SIX POLE CHANGEABLE WINDING Russian patent published in 2003 - IPC

FIELD: electrical engineering; variable-speed motors. SUBSTANCE: pole-changeable winding has 29 coil groups with coil numbers in each group alternating as follows: 1, 3, 3, 2, 2, 3, 1, 3, 3, 1, 3, 3, 3, 2, 2, 3, 3, 1, 3, 3; start of coil group 8 is connected to finish of coil group 11, start of group 11, to start of group 13, finish of group 13, to finish of group 26, start of group 16, to start of group 18, finish of group 18, to finish of group 15, start of group 20, to start of group 5, finish of group t5, to finish of group 7, start of group 7, to start of group 10, finish of group 10, to start of group 9, finish of group 11, to finish of group 19, start of group 19, to start of group 2, finish of group 2 to finish of group 4, start of group 4, to start of group 1; terminal leads are formed from starts of coil groups 18, 9, 5 and from finishes of coil groups 14, 15. Applying voltage to starts of groups 1, 9 and to finish of group 15 gives eight-pole winding. With voltage applied to starts of coil groups 5, 8 and to finishes of group 14, with other ones integrated in neutral point, winding is connected in six-pole circuit. Coils whose number is optimally chosen for each coil group are placed in 48 stator slots. EFFECT: enhanced utilization of active materials at all speeds. 1 cl, 2 dwg