TYPES OF ROTORS:
The two types of rotors are used in alternators.
SALIENT POLE TYPE:
Digital-computer program for design-analysis of salient, wound pole alternators (NASA technical note)
SMOOTH CYLINDRICAL TYPE:
DIFFERENCE BETWEEN SALIENT AND CYLINDRICAL TYPE OF ROTOR
The two types of rotors are used in alternators.
- Salient pole type
- Smooth cylindrical type.
SALIENT POLE TYPE:
Digital-computer program for design-analysis of salient, wound pole alternators (NASA technical note)
- It is used in low and medium speed alternators.
- It has a large number of projecting poles having their cores bolted or dovetailed onto a heavy magnetic wheel of cast iron (or) steel of good magnetic quality.
- It has large diameters and short axial lengths.
- The poles and pole –shoes are laminated to minimize heating due to currents.
- In large machines, field windings consist of rectangular copper strip wound on edge.
- They are built with vertical shaft.
- The stator slots on pole shoes are skewed to reduce tooth ripples. the ventilation is increased by providing fan blades.
- It is used for steam turbine-driven alternators which run at very high speeds.
- Hence turbo –generators are characteristics by small diameters and very long length.
- The cylindrical construction of the rotor gives better balance and quiter operation and also less windage losses.
DIFFERENCE BETWEEN SALIENT AND CYLINDRICAL TYPE OF ROTOR
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