A three-phase turbo alternator has a reactance of 15 ohms and negligible resistance, the machine draws an armature current of 250 amperes at 0.8 pf lagging when running on 12,000 volts infinite busbars. If the stream admission is constant but the emf is raised by 20%, calculate the new operating pf.
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.
A three-phase turbo alternator has a reactance of 15 ohms and negligible resistance, the machine
draws an armature current of 250 amperes at 0.8 pf lagging when running on 12,000 volts infinite
busbars. If the stream admission is constant but the emf is raised by 20%, calculate the new
operating pf.
Step by step
Solved in 2 steps with 2 images
