Why Salient Pole Rotor Is Used?

Salient pole rotors are large in diameter and shorter in length. They are typically used in lower speed electrical machines (100 RPM to 1500 RPM). Salient pole rotors normally require damper windings to avoid oscillations of rotors during operation. They are mostly used in hydropower plants.

Why salient pole rotor is used for low and medium speed?

Salient pole rotors have large diameter and shorter axial length. They are generally used in lower speed electrical machines, say 100 RPM to 1500 RPM. As the rotor speed is lower, more number of poles are required to attain the required frequency.

What are the advantages of salient pole rotor?

reduced noise. reduced windage loss. adoptability to low and medium speed operation.