THREE-PHASE TWO-LAYER SPLIT (q=6,25) WINDING OF ELECTRIC MACHINES Russian patent published in 2005 - IPC

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=6,25) winding is made 2p=8c-polar with grouping 7 6 6 6 in z=75c grooves of 12c coil groups with numbers 1Γ...12(c)Γ with concentric coils having average step by grooves y_c=9, integer value c=1,2,..., numbers i' and i=1...7 of coils in groups, beginning from outer one, and 2w_c groove coils. In accordance to invention, in groups 1 Γ...4 Γ of first grouping seven-coil group 1 Γ has coil steps y_gi=15-2(i-1) with coil numbers (1-x)w_c in i=1,7, and six-coil ones - y'_gi=14-2(i'-1) with coil number (1+x)w_c in i'=3 of group 3Γ for w_c coils in remaining coils of groups, while said distribution of not even-coil coils is repeated in each following grouping, where x=0,46.

EFFECT: decreased differential dissipation σ_d of symmetric m'=3-zone split (q=z/3p=6,25) winding.

3 dwg