THREE-PHASE DOUBLE-LAYER LOOP WINDING PLACED IN 78 SLOTS, 2P = 34 POLES Russian patent published in 2007 - IPC H02K3/04 H02K3/28 

FIELD: electrical and electromechanical engineering; stators of induction and synchronous machines, induction-motor wound rotors.

SUBSTANCE: proposed double-layer, fractional-pitch loop winding placed in z = 78 slots with 2p = 34 poles, m' = 3 bands, with slots per pole per phase q = z/3p = 26/17 has 3p = 51 coil groups numbered 1G through 51G, coils being grouped in row 22121212121212121 repeated three times. Coil slot pitch y_m = 3, 1 with turn number w_c, (1 - x) w_c groups for concentric double-coil groups and y_p = 2w_c with turn number (1 + x) w_c for single-coil groups, where 2w_c is turn number in slot completely filled with winding at optimal value of x, x_opt = 0.59.

EFFECT: minimized differential dissipation percentage.

1 cl, 4 dwg