ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING IN z=111·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 with m'=3-section furnished with 2p=16·c poles (q=37/11 and q=37/13). For this, the three-phase machine winding at z=111c slots is composed as follows, i.e. 1) at 2p=22·c poles with the number of slots per a phase and pole q=z/3p=37/11 it is made up of 3p·c coil groups with the numbers from 1"Г" to 33"Г"·c and the coil group in the series 43433433433 repeated 3·c times. In the first group 1"Г"...11"Г" the four-coil windings feature the coil pitch over the slots y_si=8, 6, 4, 2 with (1-x)w_c, w_c, w_c, (1-x)w_c turns, while the three-coil ones feature y'_si=7, 5, 3 with w_c, (1+x)w_c, w_c turns at x=0.38; 2) at 2p=26·c poles with the number of slots per a pole and phase q=z/3p=37/13 are made up of 3p c coil groups with the numbers from 1"Г" to 39"Г"·c and the coil group and in the series 3333332333332 repeated 3 c times in the first group 1"Г"...13"Г", the three-coil groups feature the coil pitch over the slots y_si=6, 4, 2 with w_c, w_c, (1-x)w_c turns in 1"Г", 6"Г", 8"Г", 12"Г" and w_c, (1+x)w_c, (1-x)w_c in 3"Г", 4"Г", 10"Г", y _si=4, 4, 4 with (1-x)w_c, (1+x)w_c, w_c in 2"Г", 9"Г" and w_c, (1+x)w_c, (1-x)w_c in 5"Г", 11"Г", and, the two-coil groups feature y'_si=5, 3·with (1+x)w_c, (1+x)w_c turns at x=0.54. 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 slot turns filled completely with the winding.

EFFECT: reducing winding differential dissipation factor.

2 cl, 8 dwg