ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING AT 2p=16·c POLES IN z=3(8·b+3)·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 incorporating 2p=16·c poles in z=3(8·b+3)·c slots at b=2,3,4, with the number of the slots per a phase and pole q=z/3p=19/8, 27/8, 35/8. The winding at 2p=16·c poles is made up of 2p c coil groups with the numbers from 1"Г" to 24"Г"·c, i.e. 1) in z=57·c slots with q=19/8 and the group 32322322, i.e. in the first group 1"Г"...8"Г", the three-coil groups feature the coil pitch over the slots y_si=6, 4, 2 with the number of turns (1-x)w_c, w_c, (1-x)w_c , while the two-coil windings feature y'_si=5, 3 with w_c, (1+x)-w_c turns at x=0.38; 2) in z=81·with the slots with q=27/8 and the coil group 43433433, the first coil group 1"Г"...8"Г" features 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 windings feature y'_si=7, 5, 3 with w_c, (1+x)w_c, w_c turns at x=0.38, 3) in z=105c slots with q=35/8 and the coil group 54544544, the first coil group 1"Г"...8"Г" feature the five-coil windings with 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 and the four-coil windings feature y'_si=10, 8, 6, 4 with w_c, w_c, (1+x)w_c, w_c at x=0.38. 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.

3 cl, 10 dwg