(Solved): QUESTION 1 A 3-phase, 8-pole, 60 Hz , wye-connected, salient-pole synchronous generator has 96 slots ...

QUESTION 1 A 3-phase, 8-pole, 60 Hz , wye-connected, salient-pole synchronous generator has 96 slots, with 4 conductors per slot connected in series in each phase. The coil pitch is 10 slots. If the maximum value of the airgap flux is 60 mWb and the flux-density distribution in the airgap is sinusoidal, evaluate: 1.1 The rms line voltage. 1.2 If each phase is capable of carrying 650 A in current, what is the KVA rating of the machine? QUESTION 2 A 3-phase star-connected synchronous machine's nameplate show that the machine is rated at 45 kVA and 220 V (line to line). The machine is set to have 6-poles. Measurements taken on an open circuit test showed that the field current was 2.84 A and line to line voltage was 220 V . On a short circuit test, the results were recorded in Table 1. The measurements from the air-gap line are: Field current \( =2.2 \mathrm{~A} \), line to line voltage \( =202 \) V . 2.1 Determine the synchronous reactance and the short circuit ratio.