DOUBLE-WINDING STATOR WITH C m=3-PHASE 2p=4·k- AND 2р=6·k-POLE LAP WINDINGS IN z=72·k SLOTS Russian patent published in 2009 - IPC H02K17/14 H02K3/04 H02K3/28 

FIELD: electricity.

SUBSTANCE: present invention relates to electrical engineering specific features of designing stators with two three-phase windings, meant for double-speed asynchronous cage motors. The essence of the invention lies in that, for the double winding stator with m=3 phase 2p₁=14·k and 2p₂=6 k-pole lap windings in z=72·k slots, each of which is made symmetrical with an m=6-zone from equally spaced coils, put into slots in two layers. According to this invention: from K=z coils with numbers from 1K to (z)K, the 2p₁ pole winding relates to K/2 coils with odd numbers 1K, 3K,…, (z-1)K, containing w_k1 turns and connected into 6p₁ coil semi-groups with q'₁=3 neighbouring coils in each. The 2p₂ pole winding relates to K/2 coils with even numbers 2K, 4K,…, (z)K, containing w_k2 turns and connected into 6p₂ coil semi-groups with q'₂=2 neighbouring coils in each. All coils have uneven spacing in the slots, equal to y_k=13, or y_k=15, where k=1, 2, 3 given q'₁=z/12p₁ and q'₂=z/12p₂.

EFFECT: easier manufacturing of double-winding stators of asynchronous motors, improvement of use of active materials with low input of insulating materials, as well as improvement of electromagnetic parametres of the proposed stators due to reduced slot and differential scattering, compared with common stators with separate different polar single- and double-layer windings.

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