a) Give TWO (2) types of rotor in synchronous machine and
describe the differences of these two rotors.
b) A three-phase 11kV, 12 MVA, 50 Hz, 4 poles, Y-connected, 0.9
power factor lagging synchronous generator has a synchronous
reactance and armature resistance of 0.05 Ω and 0.4 Ω per phase
respectively. Under full load condition, the friction and windage
losses are 60 kW and the core losess are 39 kW. Determine:
i) The generator speed at no-load condition in rpm...