58-kVA, star-connected, 448 V, 3-phase, 50-Hz alternator, the effective armature resistance is 0.625 ohm per phaseThe synchronous reactance is 3.2 ohms per phase and leakage reactance is 0.5 ohm per phase. Determine at rated load and unity power factor: (a) Internal emf Ea (b) No load emf (c) percentage regulation on full-load
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.
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A 58-kVA, star-connected, 448 V, 3-phase, 50-Hz alternator, the effective armature resistance is 0.625 ohm per phaseThe synchronous reactance is 3.2 ohms per phase and leakage reactance is 0.5 ohm per phase. Determine at rated load and unity power factor:
(a) Internal emf Ea
(b) No load emf
(c) percentage regulation on full-load
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