THREE-PHASE TWO-LAYER SPLIT (q=4,25) 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=4,25) winding is made 2p=8c-polar with grouping 5 4 4 4 in z=51c grooves of 12c coil groups with numbers 1Γ...12(c)Γ with concentric coils having average step by grooves y_c=6, integer value c=1,2,..., and 2w_c groove coils. In accordance to invention, in groups 1 Γ...4 Γ of first grouping five-coil group 1 Γ has coil steps y_gi=10,8,6,4,2 with coil numbers (1-x)w_c,w_c,w_c,w_c,(1-x)w_c, and four-coil ones - y_g=9,7,5,3 with coil numbers w_c,(1+x)w_c,w_c,w_c, in group 3 Γ 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=0,45.

EFFECT: decreased differential dissipation σ_d of symmetric m'=3-zone split (q=z/3p=4,25) winding.

3 dwg