FIELD: electrical engineering.
SUBSTANCE: invention can be used for manufacturing of low-noise energy-efficient asynchronous and synchronous electric machines. Combined winding of energy-efficient electric machine includes two interdependent three-phase parts of winding, connected one into a triangle, the other into a star, with the ratio of the number of their turns equal to 
. Each phase has an equal number of slots, in which the phase coils are laid so that the delta coils created by adjacent pairs of phase coils, each with active resistance Rd, and star coils, each with active resistance Rs. Resulting vectors of magnetic induction of coils of each of two adjacent phases form angle of 30 el. degrees. Outputs of similar phases of star and delta are connected to each other, forming points of winding connection to supply three-phase network. Invention differs in that measured under identical conditions values of active resistance of coils of triangle and coils of star, Rd and Rs, respectively, satisfy the relationship Rd=3Rs.
EFFECT: improved power and operational characteristics.
1 cl, 2 tbl
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