FRACTIONAL-SLOT THREE-PHASE WINDING Russian patent published in 1995 - IPC

FIELD: electrical machines. SUBSTANCE: each coil group of winding has three coils with slot pitch and coil turns y_p=10,8 6 and 2·W_k, W_k, W_k for odd-numbered groups and for even-numbered groups; starting sides of coils of first pair of groups are placed in slots numbered 1, 2, 3 and 5, 6, 7; each next pair of groups is placed in slots shifted through 2q=7 slots relative to preceding pair of groups, where p= 1,2,3. z=21p; k=0.1.2, (2p-1); 2·W_k is number of turns per slot; value of x is chosen from range 0,50≅ x≅ 0,55.. EFFECT: improved design. 5 dwg