ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING IN z=180·c SLOTS AT 2p=22·c AND 2p=26·c POLES 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 (q=60/11 and q=60/13) with m'=3-section. A three-phase double-layer winding laid in z=180c slots, i.e. 1) at 2p=22·poles with the number of slots per a pole and phase q=z/3p=60/11 is made up of 3p·c coil groups with numbers from 1 "Г" to 33 "Г" c and coils' group in the series 65656565655 repeated 3·c times, in the first group 1"Г"...11"Г" the concentric coils feature the pitch over the slots y_si=13-2(i-1) group of six- and y'_si=12-2(i'-1) five-coils with the number of coil turns (1-x)W_c i=1, 6, (1+x)W_c coils group i=3 group 3"Г", 5"Г", 7"Г" and coils i'=3 with turns w_c of the other coils of this group and with x=0.43; 2) at 2p=26·c poles with the number of slots per a pole and phase q=z/3p=60/13 is made up of 3p·c coil groups with numbers from 1 "Г" to 39"Г" c and coil group in the series 5545545455454 repeated 3 times, in the first group 1"Г"...13"Г" concentric coils feature the pitch over slots y_si=11-2(i-1) of the group of five- and y'_si=10-2(i'-1) four-coil with the number of coil turns (1-x)w_c i=1, 5, (1+x)W_c of coils i=3 and i'=3 at W_c turns of the other coils' groups and x=0.57, where c=1, 2, 3; i and i' is the numbers of coil groups starting from external coils, 2w_c is a number of slots filled completely with a winding. The aforesaid distributions of coils with unequal number of turns are repeated in every following group.

EFFECT: reducing winding differential dissipation factor.

2 cl, 8 dwg