ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING AT 2p=26·c POLES IN z=162·c AND z=168·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 furnished with (q=54/13 and q=56/13). For this, the aforesaid winding at 2p=26·c poles is composed of 3p·c coils groups with the numbers 1"Г"...39"Г"·c, i.e. 1) in z=162·c slots with the number of slots per a pole and phase q=54/13 and the group 5444445444444, i.e. the first group 1"Г"...13"Г" the five-coil groups feature the coil pitch along the slots y_si=10, 8, 6, 4, 2 with (1-x)w_c, w_c, w_c, w_c, (1-x)w_c turns, while the four-coil groups feature y'_si=9, 7, 5, 3 with w_c, (l+x)w_c, w_c, (1-x)w_c turns in 4"Г", 10"Г", 11"Г", y'_s=6 with w_c, (1+x)w_c, w_c, (1-x)w_c in 2"Г", 3"Г", 8"Г", 9"Г" and (1-x)w_c, w_c, (1+x)w_c, w_c in 5"Г", 6"Г", 12"Г", 13"Г" at x=0.46, 2) in z=168·c slots with the number of slots per a pole and phase q=56/13 and the coil group 5445445445444, i.e. in the first group 1"Г"...13"Г", the five-coil groups feature the coil pitch over the slots y_si=10, 8, 6, 4, 2 with (1-x)w_c, w_c, w_c, w_c, (1-x)w_c turns, while the four-coil feature y'_si=9, 7, 5, 3 with w_c, (1+x)w_c, w_c, w_c turns in 2"Г", 3"Г", 5"Г", 6"Г", 8"Г", 9"Г" and w_c, (1+x)w_c, w_c, (1-x)w_c in 12"Г", y'_s=6 with w_c, (1+x)w_c, w_c, w_c in 11"Г" and w_c, w_c, (1+x)w_c, w_c in 13"Г" at x=0.37. 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