| 摘要 |
FIELD: electrical engineering. ^ SUBSTANCE: proposed double-layer pole-changing winding whose phase leads are connected in Y/YY or Delta/YY has Ncg = 6p2 coil groups placed in z = 6p2q slots with slot pitch ys = z/2p1, each phase being divided into two parts with odd-numbered groups in one part, even-numbered ones, in other part, and additional leads, brought out of midpoints in each phase. With 2p1/2p2 = 4/2, 8/4, and 12/6, odd-numbered concentric five-coil groups have coil pitches ysi = 11 - 2(i - 1) at turn number (1 - x)wc of coil with i = 1, 5 and at turn number(1 + x)wc of coil with i = 3, and even-numbered four-coil groups have coil pitch y'si = 10 - 2(i - 1) with turn number (1 + x)wc of coil with i = 3 at wc turns of remaining coil groups, where z = 27 for 2p1/2p2 = 4/2, z = 54 for 2p1/2p2 = 8/4, z = 81 for 2p1/2p2 = 12/6; i = 1... 5 is coil number in group starting from external one; 2wc is turn number per slot at x = 0.52. ^ EFFECT: equalized internal voltages and resistances among large and small coil groups of proposed winding. ^ 1 cl, 3 dwg |
