ELECTRICAL-MACHINE THREE-PHASE DOUBLE-LAYER WINDING WITH 2p=10c POLES IN z=54c SLOTS 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 = 10c poles in z = 54c slots and coils grouped 3c times is made of 15c concentric-coil groups numbered 1G through 15(c)G at mean slot pitch of coils y_c = 5 and integer number c = 1, 2, 3,... In order to reduce differential dissipation σ_d in m' = three-band fractional-pitch (q = 18/5) lap winding, four-coil groups 1G, 2G, 4G in first-grouping coil groups 1G through 5G have slot pitches y_m = 8, 6, 4, 2 with coil turn numbers w_c/ w_c, w_c, (1 - x)w_c, respectively, and three-coil groups 3G, 5G have slot pitch y_s = 7, 5, 3 with coil turn numbers w_c, (1+ x)w_c, w_c, respectively, mentioned distribution of coils with unequal turn number being repeated in each next grouping, where index of turn number inequality of phase groups x = 0.67.

EFFECT: reduced differential dissipation in double-layer lap winding.

1 cl