Abstract <p>In three-phase fractional tooth windings of multipole electric machines, it is possible to combine two three-phase windings, one of which is connected according to the “star” scheme, and the other according to the “delta” scheme, with different numbers of turns in phases and wires of different cross sections; the axes of windings are shifted by an angle of π/6. The windings are connected in parallel or in series, the combined winding is connected to a three-phase main voltage from a single source. In terms of electromagnetic properties, a three-phase combined fractional tooth winding is similar to a six-phase fractional tooth winding. The possibility of producing symmetrical three-phase combined fractional tooth windings with different ratios of the numbers of slots and poles is determined. The number of slots per pole should be 6/5 and the number of pole pairs should be a multiple of 5, or the number of slots per pole should be 6/7 and and the number of pole pairs should be a multiple of 7. Examples of winding implementation are given and their winding coefficients are calculated. It is shown that for the fundamental harmonic the winding coefficient of three-phase combined fractional tooth windings reaches 0.9659258, which is 3.52% more than for fractional tooth but uncombined windings. The efficiency of using combined fractional tooth windings in three-phase multipole electric machines is confirmed. The use of an adjustable frequency electric drive increases the prospects for using combined fractional tooth windings in three-phase electric motors. Combined fractional tooth windings with a series connection of the star and delta circuits have better potential conditions for emerging wave processes in the case of an electric motor powered by a frequency converter with pulse-width modulation of voltage.</p>