ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING IN z=144·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 (q=48//11 and q=48/13). For this, the three-phase machine winding at 2p=22·c poles and with z=144c slots feature the following, i.e. 1) at 2p=22·c poles with the number of slots per a pole and phase q=z/3p=48/11 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 54554554554 repeated 3·c times, i.e. in the first group 1"Г"...11"Г", the five-coil windings feature the coil pitch over the slots y_si= 11, 9, 7, 5, 3 with (1-x)w_c, w_c, w_c, w_c, (1-x)w_c turns, while the four-coil windings feature y_si = 10, 8, 6, 4 with w_c, 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 phase and pole q=z/3p-48/13, the winding is made up of 3p·c coil groups with the numbers from 1"Г" to 39"Г" and the coil group in the series 4443443443443 repeated 3 c times, i.e. in the first group 1"Г"...13"Г", the four-coil windings feature the coil pitch over the slots y_si=9, 7, 5, 3 with (1-x)w_c, w_c, (1+x)w_c, (1-x)w_c turns, while the three-coil windings feature y'_si = 8, 6, 4 with w_c, (1+x)w_c, (1+x)w_c turns at x=0.40, where c=1, 2, 3,...; 2w_c is a number slot coils completely filled with 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