ELECTRICAL-MACHINE THREE-PHASE DOUBLE-LAYER WINDING WITH 2p=10, z=108 (q=18/5) Russian patent published in 2006 - IPC H02K3/04 H02K3/28 

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

SUBSTANCE: proposed three-phase double-layer lap winding with 2p = 10 in z = 108 slots and coils grouped in row 4 4 3 4 3 repeated 6 times is made of 6p = 30 coil groups numbered 1G through 30G at mean slot pitch of coils y_c = 9. Novelty is that in order to reduce differential dissipation σ_d in m' = six-band fractional-pitch (q = 18/5) lap winding, coil groups 1G and 2G in first-grouping coil groups 1G through 5G have turn numbers (1 - x)w_c in first coil of coil group 1G and in fourth coil of coil group 2G, and coil groups 3G and 5G have turn numbers (1 + x)w_c in intermediate coil at turn number w_c in remaining coil groups with 2w_c turns in each slot. Mentioned distribution of coils with unequal turn number is repeated in each next grouping at x = 0.28.

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

1 cl, 3 dwg