Advantages of Skewing of rotor conductor

Rotor:

Rotating part of the motor, made up of laminated silicon steel mounted on the shaft. It is a hollow core having slots on its outer periphery. Copper or aluminium windings placed in these slots.

• It consists of laminated cylindrical core having slots on its outer periphery, slots are not parallel to the shaft axis they are skewed at a certain angle. A thick copper or aluminium bars are placed in each slots.
• All these bars are permanently joined together at both ends by metal rings called end rings.
• The rotor bars and end rings together resembles the cage of a squirrel and hence the name.
• Rotor is not electrically connected to the supply but has current induced in it by transformer action from the stator.
• These type rotor motor have low starting torque, because of no addition any external resistance to the rotor circuit.

Advantages of Skewing of rotor conductor

• It reduces the magnetic noise during working.
• It provides uniform torque.
• To increase the starting torque.
• It improves the power factor.
• Harmonic elimination.
• It prevents magnetic locking of the stator and rotor.