COMBINED STATOR WINDING Russian patent published in 1997 - IPC

FIELD: combined alternating-current machines with two unequal-polarity fields, such as rotary frequency and phase converters. SUBSTANCE: combined double-layer stator winding with pole pairs p_B/P_A= 4/1 is placed in slots Z and has distributed coil groups from 1 to 24 (C=24) at slot pitch y_s; it is connected in two parallel three-phase stars with three-phase terminals C1, C2, C3 for pole pairs p_B= 4 from their starting leads and auxiliary terminals U1-U2 for pole pairs p_A= 1 from their neutral points; groups numbered 1, 22, 17, 7 and 13, 10, 4, 19 are series-connected in first phase of first and second stars, groups 5, 14, 20, 11 and 17, 2, 8, 23, in second phase, and 9, 18, 24, 3, and 21, 6, 12, 15 in third phase; even-numbered groups are differentially connected relative to odd-numbered groups; finishing leads of groups 1 and 13, 5 and 9, and 21 are interconnected in each phase; slot number Z= 24.C at c = 1,2,3 ... - integer number of coils per coil group; slot pitch y_s. EFFECT: enlarged functional capabilities. 3 dwg