The one-phase synchronous reactance of the 480-V, 50-Hz, Y-connected, 6-pole synchronous generator is 1.2 Ohm. The armature current at full load is 60 A at a forward power factor of 0.8. The friction and wind losses of the generator are 2 kW, the iron losses are 1.2 kW. Armature resistance is neglected. The excitation current Vt voltage is adjusted to be 480 V in no-load operation. What will be the terminal voltage Vt when the generator is operated at rated current with a forward power factor of 0.8? under specified conditions Find the efficiency of the generator in case of operation.
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.
The one-phase synchronous reactance of the 480-V, 50-Hz, Y-connected, 6-pole synchronous generator is 1.2 Ohm. The armature current at full load is 60 A at a forward power factor of 0.8.
The friction and wind losses of the generator are 2 kW, the iron losses are 1.2 kW. Armature resistance is neglected. The excitation current Vt voltage is adjusted to be 480 V in no-load operation. What will be the terminal voltage Vt when the generator is operated at rated current with a forward power factor of 0.8? under specified conditions
Find the efficiency of the generator in case of operation.
Step by step
Solved in 2 steps
