What is the difference between salient pole and non-salient pole?
What is the difference between salient pole and non-salient pole?
The third difference between salient pole and cylindrical pole is that the cylindrical pole (non-salient) design is much more durable and has a much lower winding loss than a salient pole unit. Next, its diameter is smaller but the axial length is longer. Also, both winding and noise are less than salient polar rotors.
What is meant by non-salient pole?
Non-salient pole rotors are cylindrical in shape having parallel slots on it to place rotor windings. It is made up of solid steel. The construction of non-salient pole rotor (cylindrical rotor) is as shown in figure above. Cylindrical rotors are used in high speed electrical machines, usually 1500 RPM to 3000 RPM.
What is salient pole synchronous machine?
Salient Pole Synchronous Alternator: Salient pole Generators will have large diameter and short axial length. Pole shoes cover 2/3 of the pitch. Salient Poles are laminated in order to reduce eddy currents. They are used in hydraulic turbines or diesel engines.
Where are salient pole rotors used?
hydropower plants
Where is the salient pole rotor used? About the salient pole rotor speed, it is mainly used for low- and medium-speed output because of its mechanical instability at higher speeds. It is used in hydropower plants. It is also used in water turbine-powered in low-speed generators.
What are the advantages of salient pole type construction?
Advantages of salient-pole type construction are :
- They allow better ventilation.
- The pole faces are so shaped that the radial air gap length increases from the pole center to the pole tips so that the flux distribution in the air-gap is sinusoidal in shape which will help the machine to generate sinusoidal emf.
What are the feature of the salient pole and non salient pole rotor?
Difference Between Salient Pole & Non-Salient Pole Rotor
| S.no. | Salient Pole Type Rotor | Non-salient Type Rotor |
|---|---|---|
| 8. | Perfectly not balanced. | Perfectly balanced. |
| 9. | Air gap is present in between poles. | No air-gap in between poles. |
| 10. | Flux is not uniform due to interpolar gap. | Flus is uniformly distributed. |
What are the feature of the salient pole and non-salient pole rotor?
Which type of rotor is best for a turbo alternator?
Smooth cylindrical type rotor is generally used for high speed alternators or turbo alternators.
What are the advantages of salient pole?
What are the advantages of salient pole rotor?
reduced noise. reduced windage loss. adoptability to low and medium speed operation.
In which type of rotor the air gap is uniform?
Cylindrical Pole Alternator: Unslotted portion of the cylinder acts as poles hence poles are non-projecting. The air gap is uniform due to the smooth cylindrical periphery. Small diameter and the large axial length is the feature. Mechanically strong.
How is turbo alternator driven by?
How is the turbo-alternators driven by? Explanation: The turbo alternators are one category among the synchronous machines. They are driven by the steam turbines.
What is the purpose of using salient pole?
Salient pole synchronous generators are mostly used in hydro power plants . Non-salient pole rotors are cylindrical in shape having parallel slots on it to place rotor windings. It is made up of solid steel.
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What is salient pole of a generator?
Saliency simply means projection outward . Therefore from the literal meaning of Saliency one can guess that Salient Pole machines must have poles projecting outward. In general, the Cylindrical Rotor type machines are confined to 2 and 4 pole turbine generators, while salient pole types are built with 4 poles upwards and include most classes of duty.
What does pole, salient mean?
Pole, Salient. In dynamo and motor field magnets, salient poles are those projecting from the base or main body of the field magnet , as distinguished from consequent poles formed by coils wound on the main body itself.