A 9-kVA, 208 V, 1200-rpm, three phase, 60 Hz, Y- connected, Synchronous generator has field winding resistance of 4.5ohm. The armature winding impedance is 0.3+j5 ohms per phase. When the generator operates at its full load and 0.8 lagging, the field winding current is 5A. The rotation loss is 500W.
a. Determine the voltage regulation
b. Determine the efficiency of the generator.
c. The torque applied by the primer mover.