EE 322 Activity # 1 Solve the following problems. 1. A wye attached armature winding with 144 slots and 10 conductors per slot runs at 450 rpm in a 3-phase, 16-pole alternator. The flux per pole is 40 mWb, with a distribution factor of 0.966. What is the voltage between the two lines? 2. A single layer full-pitch winding with 8 conductors per slot is used in a 3-phase 4-pole alternator. The armature has 36 slots in total. When the alternator is powered at 1800 rpm with a flux of 0.05 Wb per pole, calculate the voltage between the lines. 3. A 60-slot, 4-pole, 3-phase, 60-Hz wye-connected alternator with two conductors per slot in two layers. Fractional pitch winding with one side in slot No. 1 and the other in slot No. 13. Calculate the flux per pole needed to induce a 6600 volt emf between two lines. 4. A wye connected 4-pole, 3-phase, 60-Hz alternator has 24-slots with 40 turns in each coil and 63 mWb of sinusoidally distributed flux per pole. If the pitch factor is unity, what is the open circuit terminal voltage? 5. At normal voltage, a 1500 kVA, 6600-V, 3-phase, Y-connected generator with a synchronous impedance of (0.40 + j6.0) ohms per phase produces full load current and 0.80 power factor lagging current. At 0.80 leading power factor, what would be the terminal voltage with the same excitation and load current?
