THREE-PHASE FRACTIONAL-SLOT (Q=12/5) ELECTRICAL MACHINE WINDING Russian patent published in 1997 - IPC

FIELD: multipolar AC machines. SUBSTANCE: double-layer winding with number of poles 2p=10 in 72 slots of 30 groups numbered from 1G to 30G with coils grouped in row 32322 repeated 6 times, the coils of three-coil groups 1G+(5c)G and 3G+(5c)G have numbers of turns (1-x)W_coil,(1+x)W_coil,(1-x)W_coil respectively, and the coils of the two - coil groups have W_coil turns each for groups 2G+(5c)G, (1+X)W_coil, and W_coil turns for groups 4G+(5c)G, W_coil and (1+X)W_coil turns for groups 5G+(5c)G, spacing in slots y_s=6, K=0,1,2... (2p-1), c=0,1,2,...(P), 2W_coil - number of turns in a slot, and 0.25=x=0.35. EFFECT: reduced differential dissipation. 4 dwg