Option 2: Salient pole rotor type & due to non uniform air gap used for low or medium speed operation.
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.
In hydro generator or hydro alternator which type of rotor is used and why?
- Option 1:
Cylindrical pole rotor type & used for low speed operation
- Option 2:
Salient pole rotor type & due to non uniform air gap used for low or medium speed operation.
- Option 3:
Cylindrical pole rotor type & used for low speed operation
- Option 4:
Salient pole rotor type & due to uniform air gap used for high speed operation
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