Find the regulation at full load current of 40 A at 0.8 power factor lagging, using emf method and mmf method.
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 table gives data for open circuit and short circuit tests on a 6 pole, 440 V, 50 Hz, 3 phase star connected alternator. The effective ohmic resistance between any two terminals of the armature is 0.3 ohm.
|
Field current (A) |
2 |
4 |
6 |
7 |
8 |
10 |
12 |
14 |
|
OC Vltage (V) |
156 |
288 |
396 |
440 |
474 |
530 |
568 |
592 |
|
S.C current |
11 |
22 |
34 |
40 |
46 |
57 |
69 |
80 |
Find the regulation at full load current of 40 A at 0.8 power factor lagging, using emf method and mmf method.
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