ELECTRICAL-MACHINE THREE-PHASE DOUBLE-LAYER WINDING WITH 2p=10c POLES IN z=24c 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= 24c slots and coils grouped in row 2 2 1 2 1 repeated 3c times is made of 15c coil groups numbered 1G through 15(c)G and concentric coils having their mean slot pitch y_s = 2, 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 = x/3p = 8/5) lap winding, two-coil groups 1G, 2G, 4G in first-grouping coil groups 1G through 5G have slot pitches y_si = 3, 1 of coils having turn numbers w_c, (1 - x)w_c, respectively, and single-coil groups 3G, 6G have slot pitches y_s = 2 of coils with turn number (1 + x)w_c at w_c turns in remaining coil groups, mentioned distribution of coils with unequal turn number being repeated in each next grouping, where x = 0.61 is index of turn number inequality of phase groups.

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

1 cl, 3 dwg