THREE-PHASE TWO-LAYER ELECTRIC MACHINE WINDING IN z=138·c GROOVES AT 2p=22·c AND 2p=26·c POLES Russian patent published in 2008 - IPC H02K3/04 H02K3/28 

FIELD: electricity.

SUBSTANCE: application: electric machine engineering. Invention resolves the problem of differential scattering factor σ_d, symmetrical to m'=3-zone electric machine fractional (q=46/11 and q=46/13) loop winding. For this purpose three-phase electric machine winding in z=138c grooves: 1) at 2p=22·c poles with grooves number per each pole and phase q=z/3p·46/11 is arranged from 3p·c coil groups with numbers from 1"Г"...33"Г" c and coils arrangement according to 54444544444 line being repeated 3·c times: first group is five-coil 1"Г"...11"Г" group where coils are repeated in grooves in the following order y_Gi=10, 8, 6, 4, 2 c (1-x) w_k, w_k, w_k, W_k, (1-x) w_k as loops, whereas four-coil groups are as follows y'_Gi = 9, 7, 5, 3 c w_k, (1+x) w_k, w_k, (1-x) w_k in 3"Г", 4"Г", 9"Г", y'_Gi=6, 6, 6, 6 c w_k, (1+x) w_k, w_k, (1-x) w_k in 2"Г", 7"Г", 8"Г" and (1-x) w_k, w_k, (1+x) w_k, w_k in 5"Г", 10"Г", 11"Г" at x value =0,45; 2) at 2p=26·c poles with grooves number per each pole and phase q=z/3p=46/13 is arranged from 3p·c coil groups with numbers from 1"Г"...39"Г" c and coil arrangement according to 4434343434343 line being repeated 3·c times: first grouping includes 1"Г"...13"Г" four-coil groups with coil located in grooves in the following order y'_Gi = 8, 6, 4, 2 c w_k, w_k, w_k, (1-x) w_k as loops, and three-coil groups y'_Gi = 7, 5, 3 c w_k, (1+x) w_k, w_k as loops at x value = 0.63, where c = 1, 2, 3,...; 2w_k - number of groove loops fully filled with winding. The said distribution of uneven loop coils is repeated in each subsequent grouping.

EFFECT: production of three-phase two-layer electric machine winding being able to reduce differential scattering factor.

2 cl, 8 dwg