THREE-PHASE TWO-LAYER SPLIT (q=1,5) POLE-SWITCHING, MADE IN ACCORDANCE TO RELATION 2P/2P = 2/1, WINDING Russian patent published in 2005 - IPC

FIELD: electric engineering and electric-mechanical industry, can be implemented in three-phase two-speed and multi-speed asynchronous engines with short-circuit rotor.

SUBSTANCE: in three-phase two-layer split (q=1,5) pole-switching in relation 2p₁/2p₂=2/1 winding with connection of phases in acc to circuits Y/YY or Δ/YY, made in z=6p₂q grooves from N_cg=6p₂ coil groups with coils step by grooves y_g≈z/2p₁ with splitting of each phase on two portions with non-even groups in one portion, even groups in other portion and with a os from middle points in each phase, in acc to invention, at q=1,5 concentric groups, non-even and two-coiled, have coil steps y_gi=3,1 with coil numbers w_c and (1-x)w_c, and even one-coiled groups - y_g=2 with number of coils (1+x)w_c, where z=18 for 2p₁/2p₂=8/4, z=36 for 2p₁/2p₂=16/8, 2w_c - number of coils for each groove for value of x=0,57.

EFFECT: evened out EMF and resistances of greater and lesser coil groups of m= 3 -phase two-layer split winding for q = z/6p₂ = 1,5, to allow its manufacturing as pole-switching symmetric winding with pole numbers satisfying condition 2p₁/2p₂=2/1.

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