ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING IN z=141·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=47/11 and q=47/13). The three-phase machine winding at z=141c slots, is as follows, i.e 1) at 2p=22·c poles with the number of slots per a phase and pole q=z/3p=47/11, 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 54454445444 repeated 3c times, i.e. in the first group 1"Г"...11"Г" the concentric coils feature the pitch over slots y_si=10, 8, 6, 4, 2 with (1-x)w_c, w_c, w_c, w_c, (1-x)w_c turns in five-coil groups and y'_si=9, 7, 5, 3 with w_c, (1+x)w_c, w_c, (1-x)w_c turns in the four-coil groups at x=0.43, 2) at 2p=26·c poles with the number of slots per a phase and pole q=z/3p=47/13 the winding is made up of 3p·c coil groups with the numbers from 1"Г" to 39"Г" c and the coil group in the series 4434434344343, repeated 3·c times, i.e. in the first group 1"Г"...13"Г", the concentric coils feature the pitch over the slots y_si=8, 6, 4, 2 with (1-x)w_c, (1+x)w_c, w_c, (1-x)w_c turns in the four-coil group and y_si=7, 5, 3 with w_c, (1+x)w_c, w_c turns in the three-coil group at x=0.58. 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 slots filled completely with the winding.

EFFECT: reducing winding differential dissipation factor.

2 cl, 8 dwg