ELECTRICAL-MACHINE THREE-PHASE DOUBLE-LAYER WINDING WITH 2p=10c POLES IN z=48c SLOTS Russian patent published in 2006 - IPC H02P7/00 H02K3/28 

FIELD: electrical and electromechanical engineering; three-phase induction and synchronous machines.

SUBSTANCE: proposed three-phase double-layer lap winding with 2p = 10c poles in z= 48c slots and coils grouped in row 4 3 3 3 3 3 repeated 3c times is made of 15c coil groups numbered 1G through 15(c)G at integer number c = 1, 2, 3, ... Novelty is that in order to reduce differential dissipation σ_d of electrical-machine m' = three-band fractional-pitch (q = 16/5) lap winding, concentric four-coil group 1G out of groups 1G through 5G of first grouping has pitches y_si = 8, 6, 4, 2 of coils having turn numbers (1 - x)w_c, w_c, w_c, (1 - x)w_c, respectively, and three-coil groups 3G, 4G have pitches y_si = 7, 5, 3 of coils with turn number (1 - x)w_c, (1 + x)w_c, w_c, respectively; coil groups 2G, 5G have slot pitches y_s = 5 of coils with turn numbers w_c, (1 + x)w_c, (1 - x)w_c, for coil group 2G and (1 - x)w_c, (1 + x)w_c, w_c for coil group 5G, mentioned distribution of coils with unequal turn number being repeated in each next grouping, where x = 0.51 is index of turn number inequality of phase groups.

EFFECT: reduced differential dissipation in electrical-machine fractional-pitch lap winding.

1 cl, 3 dwg