A 3-phase synchronous generator of 10 poles,130 hp,580 V,60 Hz produces the line current of 125 A and has an overall efficiency of 95%.The core loss, stator copper loss and rotor or field copper loss are 1050 W,2520 W, and 1750 W respectively. Sketch the power flow diagram, display the values on diagram. Determine the following Shaft speed (b) torque developed in rotor (c) power factor (d)combined friction, windage and stray loss
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.
5- A 3-phase synchronous generator of 10 poles,130 hp,580 V,60 Hz produces the line current of 125 A and has an overall efficiency of 95%.The core loss, stator copper loss and rotor or field copper loss are 1050 W,2520 W, and 1750 W respectively. Sketch the power flow diagram, display the values on diagram. Determine the following
Shaft speed (b) torque developed in rotor (c) power factor (d)combined friction, windage and stray loss
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