THREE-PHASE TWO-LAYER SPLIT (q=4,25) WINDING OF ELECTRIC MACHINES

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 1Gamma...12(c)Gamma with concentric coils having average step by grooves yc=6, integer value c=1,2,..., and 2wc groove coils. In accordance to invention, in groups 1 Gamma...4 Gamma of first grouping five-coil group 1 Gamma has coil steps ygi=10,8,6,4,2 with coil numbers (1-x)wc,wc,wc,wc,(1-x)wc, and four-coil ones - yg=9,7,5,3 with coil numbers wc,(1+x)wc,wc,wc, in group 3 Gamma for wc coils in remaining coils of groups, while said distribution of not even-coil coils is repeated in each following grouping, where x=0,45. ^ EFFECT: decreased differential dissipation sigmad of symmetric m'=3-zone split (q=z/3p=4,25) winding. ^ 3 dwg