THREE-PHASE DOUBLE-LAYER ELECTRIC MACHINE WINDING AT 2p=22·c POLES IN z=51·c AND z=54·c GROOVES Russian patent published in 2008 - IPC H02K3/04 H02K3/28 

FIELD: electric machine industry.

SUBSTANCE: three-phase double-layer electric machine winding at 2p=22·c poles made of 3p·c coil groups with numbers of 1G...33G c: 1) in z=51c grooves with number of grooves per pole and phase q=17/11 and grouping of 22121212121: in the first grouping 1G...11G double-coil groups have steps of coils by grooves y_gi=3.1 with W_c (1-x)W_c turns, and single-coil - y_g=2 with (1+x)w_c turns at value of x=0.60; 2) in z=54·c grooves with number of grooves per pole and phase q=18/11 and grouping of coils 22122122121: in the first grouping 1G...11G double-coil groups have steps of coils by grooves y_gi=3.1 with W_c, (1-x)w_c turns, and single-coil y_g=2 with (1+x)W_c turns at value of x=0.63. Such distribution of coils with unequal number of turns is repeated in every subsequent grouping, where c=1, 2, 3,...; 2w_c - number of grooves turns that are completely filled with winding.

EFFECT: reduction of differential scattering coefficient σ_s for symmetric m'=3 -zone electric machine fractional (q=17/11 1 and q=18/11) loop winding.

2 cl, 8 dwg