A 2 MVA, 2.3 kV, 3 phase Y connected alternator operates at rated KVA at a PF of 80%. The DC armature winding resistance between terminals is 0.08 ohms. The field takes 70 A at 125 V from an exciter equipment. Friction and windage loss is 20 kW, iron losses 36 kW and stray load losses are 2 kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance 12% of the DC resistance.

Q: 3. A three-phase 60 Hz Wye connected, 2,000-kVA, 2,300-V alternator give a short circuit-test…

A: The solution is given below

Q: In a three-phase star connected alternator it is necessary to generate 7200 line voltage at…

A:

Q: A 1200 kVA, 6600 volt, 3-phase, Y-connected alternator has an effective resistance of 0.40 ohm and a…

A: Power factor :- It is the ratio of Active power to the Apparent power of the circuit. Power factor=…

Q: Define the parts and functions of AC Generator -  Define the working principle of AC Generator. -…

A: AC Generator A machine that converts mechanical energy to electrical energy is called AC generator.…

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.