ELECTRICAL-MACHINE THREE-PHASE DOUBLE-LAYER WINDING WITH 2p=10, z=144(q=24/5) 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 = 144 slots and coils grouped in row 5 5 5 5 4 repeated 6 times is made of 6p = 30 coil groups numbered 1G through 30G at mean slot pitch of coils y_c = 12. Novelty is that in order to reduce differential dissipation σ_d in m' = six-band fractional-pitch (q = 24/5) lap winding, coil groups 2G and 3G in first-grouping coil groups 1G through 5G have turn numbers (1 - x)w_c in fifth coil of coil group 2G and in first coil of coil group 2G, and coil group 5G has turn number (1 + x)w_c in second and third coils 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 index of phase group inequality x = 0.23.

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

1 cl, 3 dwg