Determine the efficiency of a 1,500 kVA, 2,300 V 3-phase, Y-connected alternator, which operates at 70°C between terminals is 0.075 ohm. The field takes 71 Amp at 120 Volts exciter equipment. Friction and windage losses are 14 kW, iron loss is 33 kW and stray load losses is 1.55 kW. Assume the effective armature winding resistance is 1.5 times the DC value.
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
Determine the efficiency of a 1,500 kVA, 2,300 V 3-phase, Y-connected
alternator, which operates at 70°C between terminals is 0.075 ohm. The
field takes 71 Amp at 120 Volts exciter equipment. Friction and windage
losses are 14 kW, iron loss is 33 kW and stray load losses is 1.55 kW.
Assume the effective armature winding resistance is 1.5 times the DC
value.
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