COMBINED ELECTRICAL-MACHINE ROTOR WINDING Russian patent published in 1997 - IPC

FIELD: slip-ring induction machines with two unlike-pole fields. SUBSTANCE: combined electrical- machine rotor winding with pole pairs p1/p2 is squirrel-cage multiphase winding for pole pairs p1 and three-phase, star- or delta-connected for pole pairs p2 with phase leads P1, P2, P3 brought out to slip rings; double-layer winding is placed in Z=36 slots and built up of eighteen uniformly displaced coils numbered from K1 to K18 at slot pitch Ys and eighteen coils numbered from K1' to K18' at slot pitch Y's; in first phase with terminal P1, starting lead of coil K1 is series-connected to coils numbered 1K,2K,3K,-10K,-11K,-12K and each of them is cumulatively connected in parallel with coils numbered, respectively, 1K', 2K', 3K', -10K', -11K', -12K'; for two other phases, coil numbers alternate relative to phase P1 at intervals of six coils for phase P2 and twelve coils for phase p3; slot pitch of alternating coils is Ys and Y's, respectively; equally numbered coils are relatively coaxial and their turn number ratio is (1-x): (1+x), where minus in front of coil number means its differential connection in phase at Ys=17, Y's=11 and x=0.1. EFFECT: enlarged functional capabilities and improved electromagnetic characteristics. 7 dwg , 1 tbl