THREE-PHASE DOUBLE-LAYERED ELECTRIC MACHINE WINDING IN z=132·c SLOTS WITH 2p=26·c POLES (q=44/13) Russian patent published in 2008 - IPC H02K3/04 H02K3/28 

FIELD: electric machinery industry.

SUBSTANCE: three-phase double-layered electric machine winding in z=132·c slots with 2р=26·с poles with number of slots per pole and phase q=z/3p=44/13 is composed of 3р·с coil groups with numbers from 1G to 39G·с and coil grouping as 4343343433433 sequence repeated 3·c times: In the first 1G...13G grouping four-coil groups have slot pitches of y_si=8, 6, 4, 2 with turn numbers of (l-x)w_K, w_K, w_K, (I-x)w_K, and three-coil groups have у'_si=7, 5, 3 with w_K, (l+x) w_K, w_K turns at х = 0.38, where с=1, 2, 3...; 2w_K is the number of those slots that are completely filled with winding. This distribution of coils with different number of turns is repeated in every next grouping.

EFFECT: lowering of differential scattering factor σ_d of asymmetric m'=3-zone fractional-slot (q=44/13) lap winding of electric machinery.

4 dwg