A wye-connected synchronous motor connected to a 440V, 3-phase line is operating with an electrical load (torque) angle δ of -28 degrees while demanding 90 kW from the mains. The motor has negligible resistance and reactance of 1.5 Ω/ph. Calculate: (a) The line-to-neutral excitation voltage EO(LN) Angle = (b) The line current and power factor. IL Angle = 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 wye-connected synchronous motor connected to a 440V, 3-phase line is operating with an electrical load (torque) angle δ of -28 degrees while demanding 90 kW from the mains. The motor has negligible resistance and reactance of 1.5 Ω/ph.
Calculate:
(a) The line-to-neutral excitation voltage
EO(LN) Angle =
(b) The line current and power factor.
IL Angle =
pf =
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