ELECTRIC MACHINE THREE-PHASE DOUBLE-LAYER WINDING AT 2p=16·c POLES IN z=3(8·b+5) ·c SLOTS Russian patent published in 2008 - IPC H02K3/04 H02K3/28 

FIELD: electrical engineering.

SUBSTANCE: winding incorporates 2p=16·c poles made up of 3p·c coil groups with the numbers from 1"Г" to 24"Г"·c in z=3(8·b+5)·c=63·c slots, or in z=87·c, or in z=111·c slots at b = 2, 3, 4 and with the number of the slots per a pole and phase q=z/3p=21/8, or q=29/8, or q=37/8. In compliance with the first version, the winding is made in z=63·c slots with q=21/8 and the coil group 3 3 2 3 3 2 3 2 in the series repeated 3·c times. Note, that in the first group 3"Г"...8"Г", the three-coil windings feature the coil pitch over the slots y_si=6, 4, 2 and are made with (1-x)w_c, (1+x)w_c, (1-x)w_c turns while the two-coil groups feature the coil pitch over the slots y'_si=5, 3 are furnished with w_c, (1+x)w_c turns at x=0.56. In compliance with the second version, the winding is laid in z=87·c slots with q = 29/8 and the coil group 4 4 3 4 4 3 4 3 in the series repeated 3·c times. Note that in the first group 1"Г"...8"Г", the four-coil windings feature the coil pitch over the slots y_si=8, 6, 4, 2 and are made with (1-x)w_c, (1+x)w_c, w_c, (1-x)w_c turns while the three-coil windings feature the coil pitch over the slots y'_si=7, 5, 3 are made with w_c, (1+x)w_c, w_c turns at x = 0.58. In compliance with the third version, the winding is made in z=111·c slots with q = 37/8 and the coil group 5 5 4 5 5 4 5 4 in the series repeated 3·c times. Note that in the first group 1"Г"...8"Г", the five-coil windings feature the coil pitch over the slots y_si=11, 9, 7, 5, 3 and are made with (1-x)w_c, w_c, (1+x)w_c, w_c, (1-x)w_c turns, while the four-coil groups feature the coil pitch y'_si = 10, 8, 6, 4 and are made with w_c, w_c, (1+x)w_c, w_c turns at x = 0.57. 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.

4 cl, 10 dwg