ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING AT 2p=26·c POLES IN z=126·c AND z = 129·c SLOTS Russian patent published in 2008 - IPC H02K3/04 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 (q=42/13 and q=43/13). For this, the three-phase machine winding at 2p=26·c poles is made up of 3p·c coil groups with the numbers 1"Г"...39"Г"·c, i.e. 1) in z=126·c slots with the number of slots per a pole and phase q=42/13 and the group 4333433343333, the coils of the first group 1"Г"...13"Г" feature the pitch over the slots y_s=5 with (1-x)w_c, w_c, w_c (1-x)w_c with the turns of the group of four-coil w_c, (1+x)w_c, (1-x)w_c of the group 2"Г", 6"Г", 10"Г", (1-x)w_c, (1+x)w_c, w_c of the group 4"Г", 8"Г", 13"Г" and y'_si=7, 5, 3 c (1-x)w_c, (1+x)w_c, w_c with the turns of the group 3"Г", 7"Г", 11"Г", 12"Г" at x=0.50; 2) in z=129c slots with the number of slots per a pole and phase q=43/13 and the coil group 4334334334333, i.e. in the first group 1"Г"...13"Г" the four-coil groups feature the coil pitch over the slots y_si=8, 6, 4, 2 with the number of turns (1-x)w_c, w_c, w_c, (1-x)w_c, while the three-coil group feature the coil pitch over the slots y'_si=7, 5, 3 with w_c, (1+x)w_c, w_c in 2"Г", 3"Г", 5"Г", 6"Г", 8"Г", 9"Г", 25"Г", y_s=5 with w_c, (1+x)w_c, (1-x)w_c in 11"Г" and (1-x)w_c, (1+x)w_c, w_c in 13"Г" at x=0.40. The aforesaid distributions of coils with unequal number of turns are repeated in every following group, where c=1, 2, 3...; 2w_c is a number of coil turns filled completely with the winding.

EFFECT: reducing winding differential dissipation factor.

2 cl, 8 dwg