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=4,5) winding is made 2p=4c-polar in z=6cq grooves of 6c coil groups with five-coil odd and four-coil even ones with average step of concentric coils yc≈z/2pc. In accordance to invention, five-coil groups have coil steps ygi=11,9,7,5,3 with coil numbers (1-x)wc,wc,(1+x)wc,wc,(1-x)wc, and four-coil ones - y'gi=10,8,6,4 with coil numbers wc,wc,(1+x)wc,wc, where c=1,2,3,..., - integer number, z=27c, yc=1,5q+0,25=7 and 2wc - number of coils of each groove for value x=0,54.
EFFECT: better composition of harmonic operation ampere-turns, decreased differential dissipation σd of symmetric m'=3-zone split (q=z/3p=4,5) winding.
3 dwg
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