▪. A 3-phase, 6-pole, 1000 rpm alternator has an air gap diameter of 28 cm and a core length 23 cm. A two layer narrow spread (0 = 60°) winding is employed and the in 4 winding is accommodated slots/pole/phase with 8 conductor/slot. The coils are short pitched by 1-slot. When the flux density is one covering two pole pitches, is analyzed in to space harmonic. The flux is found to have an amplitude of 0.87 T and the 3rd and 5th harmonic to have amplitude of 0.24T and 0.14 T respectively. Estimate the resultant phase and line voltages on no load if the alternator is(1) star connected (2) delta connected (3) If the per phase reactance of the alternator at 50 Hz is 10 2 /ph. Calculate the Engineen circulating current when the machine is delta connected. Neglect alternator resistance. 2x023