A shunt generator is found to develop rated voltage in the armature when driven at 1000 rpm in the clockwise direction. The generator is now first stopped and then run once again at 1000 rpm but in the anti-clock wise direction. The generator, (A) will develop rated voltage across the armature with same polarity as before. (B) will develop rated voltage across the armature with reverse polarity. (C) will develop a voltage lower than the rated value across the armature with reversepolarity. (D) will fail to excite
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.
3. A shunt generator is found to develop rated voltage in the armature when driven at 1000 rpm in the
clockwise direction. The generator is now first stopped and then run once again at 1000 rpm but in
the anti-clock wise direction. The generator,
(A) will develop rated voltage across the armature with same polarity as before.
(B) will develop rated voltage across the armature with reverse polarity.
(C) will develop a voltage lower than the rated value across the armature with reversepolarity.
(D) will fail to excite.
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