FIELD: electric radio engineering and electric mechanical engineering, possible use in three-phase asynchronous and synchronous electric machines.
SUBSTANCE: three-phase two-layer split (q=1,25) winding is made 2p=8c-polar with grouping 2 1 1 1 in z=15c grooves of 12c coil groups with numbers 1Γ...12(c)Γ with concentric coils having average step by grooves yc=2, integer value c=1,2,..., and 2wc groove coils. In accordance to invention, in groups 1 Γ...4 Γ of first grouping two-coil group 1 Γ has coil steps ygi=3,1 with coil numbers (1-x)wc, and one-coil ones - yg=2 with coil numbers (1+x)wc, in group 3 Γ for wc coils in remaining coils of groups, while said distribution of not even-coil coils is repeated in each following grouping, where x=0,44.
EFFECT: decreased differential dissipation σd of symmetric m'=3-zone split (q=z/3p=1,25) winding.
3 dwg
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