JOINT ROTOR WINDING OF ELECTRIC MOTOR Russian patent published in 1997 - IPC

FIELD: electric engineering, in particular, electric machines with working zones of different poles. SUBSTANCE: rotor winding, which has pole pair ratio of p2/p1 = 4/1, has two layers which are located in Z slots of 6p2 = 24 coil groups which number ranges from 1 to 24. Said winding is multiple-phase, short-circuited for pole number p1 = 1 and three-phase for pole number p2 = 4 for star or delta connection of phases. It has output terminals for phases P1, P2, P3 at contact rings. Slot number Z is equal to 54. First group with terminal P1 from beginning of group 1 has serial circuit of groups 1, -4, 7, -10 each of which is connected in parallel aiding to respectively groups 13, -16, 19, -22. For two other phases numbers of groups go in alternating order with respect to groups of phase P1, in intervals of eight groups for phase P2 and in intervals of 16 groups for phase P3. Groups have coaxial coils which pole pitch is 21, 19, 17 for three- coil groups 1, 5, 9, 13, 17, 21 and pole is 20, 18 for other two-coil groups. EFFECT: improved electromagnetic characteristics. 3 cl, 6 dwg