5-A 3-phase, 5 kVA, 208 V, four-pole, 60 Hz, Y-connected synchronous machine has negligible stator winding resistance and a per-phase synchronous reactance of 8 2 at rated terminal voltage. Determine the excitation voltage and power angle when the machine is delivering rated kVA at a power factor of 0.8 lagging. Draw the phasor diagram.
5-A 3-phase, 5 kVA, 208 V, four-pole, 60 Hz, Y-connected synchronous machine has negligible stator winding resistance and a per-phase synchronous reactance of 8 2 at rated terminal voltage. Determine the excitation voltage and power angle when the machine is delivering rated kVA at a power factor of 0.8 lagging. Draw the phasor diagram.
Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
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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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Transcribed Image Text:5-A 3-phase, 5 kVA, 208 V, four-pole, 60 Hz, Y-connected synchronous machine has negligible
stator winding resistance and a per-phase synchronous reactance of 8 2 at rated terminal
voltage. Determine the excitation voltage and power angle when the machine is delivering rated
kVA at a power factor of 0.8 lagging. Draw the phasor diagram.
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