ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING AT 2p=16·c POLES IN z=3(8·b+1)·c SLOTS Russian patent published in 2008 - IPC H02K1/04 H02K3/28 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and aims at reducing differential dissipation factor σ_d of the electric machine symmetric divided loop with m'=3-section furnished with 2p=16·c poles in z=3(8·b+1)·c=51·c, 75·c, 99·c slots at b = 2, 3, 4 with the number of slots per a pole and phase q=z/3p=17/8, 25/8, 33/8. The invention novelty consists in the following. The three-phase double layer electric machine winding at 2p=16 c poles is made up of 3p·c coil groups with the numbers from 1"Г" to 24"Г"·c, i.e. 1) in z=51·c slots with q=17/8 and the group 32222222, the first group 1"Г"...8"Г" coils feature the pitch over the slots y_s=3 with the number of turns (1-x)w_c, w_c, (1-x)w_c in 1"Г", (1+x)w_c, (1-x)w_c in 2"Г", 3"Г", 4"Г", (1-x)w_c, (1+x)w_c in 6"Г", 7"Г", 8"Г" and y'_si= 4, 2 c (1+x)w_c, (1-x)w_c turns in 5"Г" at x=0.43; 2) in z=75·c slots with q=25/8 and the group 43333333, i.e the coils of the first group 1"Г"...8"Г" feature the pitch over slots y_s=5 with the number of turns (1-x)w_c, w_c, w_c, (1-x)w_c in 1"Г", w_c, (1+x)w_c, (1-x)w_c in 2"Г", (1-x)w_c, (1+x)w_c, w_c in 8"Г" and y _si =7, 5, 3 c (1-x)w_c, (1+x)w_c, w_c turns in 3"Г", 4"Г", 5"Г", 6"Г", 7"Г" at x=0.54; 3) in z=99·c slots with q=33/8 and the group 54444444: in the first group 1"Г"...8"Г", the coils feature the pitch over the slots y_s=6 with (1-x)w_c, w_c, w_c, w_c, (1-x)w_c turns in 1"Г", w_c, (1+x)w_c, w_c, (1-x)w_c in 2"Г", 3"Г", 4"Г", (1-x)w_c, w_c, (1+x)w_c, w_c in 6"Г", 7"Г", 8"Г", y_si=9, 7, 5, 3 with w_c, (1+x)w_c, w_c, (1-x)w_c 5"Г" at x=0.46. The aforesaid distributions of coils with unequal number of turns are repeated in every following group, where c=1, 2, 3...; 2w_c is the number of lots turns filled completely with the winding.

EFFECT: reducing winding differential dissipation factor.

3 cl, 10 dwg