DOUBLE-WINDING STARTOR WITH m=3-PHASE 2p=4·k- AND 2р=6·k- POLE LAP WINDINGS IN z=144·k SLOTS Russian patent published in 2009 - IPC H02K17/14 H02K3/04 H02K3/28 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and electrical machine building and can be used in three-phase double-speed cage asynchronous motors. The double-winding stator of an asynchronous motor has m = 3 - phase, 2p₁ = 4 k- and 2p₂ = 6 k-pole lap windings in z =144 k slots, each of which is symmetrical with m' = 6 - zone of uniformly displaced windings, placed in slots in two layers. According to this invention, of the K = z windings with numbers from 1K to (z)K, the 2p₁ - pole winding relates to K/2 windings with odd numbers 1K, 3K, …, (z-1)K, each containing w_k1 turns and connected in 6p₁ sub-groups of windings with q'₁ = 6 neighbouring windings in each, and the 2p₂ - pole winding relates to K/2 windings with even numbers 2K, 4K,…, (z)K, each containing w_k1 turns and connected in 6p₂ sub-groups of windings with q'₂ = 4 neighbouring windings in each. All windings have slot pitch y_k= 29, where k=1, 2; q'₁ = z/12p₁ and q'₂ = z/12p₂.

EFFECT: easier manufacture and increased use of active materials while simultaneously reducing amount of insulating materials used, as well as increase in differential scattering coefficients σ_D% of the given windings of the double-winding stator when Z = 144·k slots.

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