THREE-PHASE TWO-LAYER SPLIT (q=4,75) 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=4,75) winding is made 2p=8c-polar two-layered with grouping 5 5 5 4 in z=57c grooves of 12c coil groups with numbers 1Γ...12(c)Γ with concentric coils having average step by grooves y_c=7, integer value c=1,2,..., numbers i',i=1...5 coils in groups, starting from outer one, 2w_c of each groove. In accordance to invention, in groups 1 Γ...4 Γ of first grouping five-coil groups have coil steps y_gi=11-2(i-1) with coil numbers (1-x)w_c in i=5 of groups 1Γ,3Γ and in i=1 of group 2Γ,(1+x)w_c in i=3 of group 2Γ, and four-coil one 4Γ - y'_gi=10-2(i'-1) with coil numbers (1+x)w_c in i'=2 and 3 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=0,48.

EFFECT: decreased differential dissipation σ_d of symmetric m'=3-zone split (q=z/3p=4,75) winding.

3 dwg