An induction motor works with AC Only.
Hold the armature stampings in position
The stator frame in an induction motor is used to hold the armature stampings in position.
Closed grained cast iron
The frame of an induction motor is made of Closed grained cast iron.
Eddy current loss
All of the above
Consequent pole with opposite polarity
The induction motor shaft should be Stiff.
The induction motor shaft is made of Mild steel.
Easy to cast owing to its low melting point and is easily available
Induction motors normally use die cast aluminum rotor because aluminum is Easy to cast owing to its low melting point and is easily available.
Rotor conductors are short circuited through end rings
In a 3-phase squirrel cage induction motor Rotor conductors are short circuited through end rings.
Any number of poles in an
Facilitate cooling of rotor
The squirrel cage induction motors are provided with blades in order to Facilitate cooling of rotor.
Three phase winding
The rotor of a 3-phase wound rotor induction motor is provided with Three phase winding.
Connect extra resistance across them during starting
External star connected resistors
In a 3-phase slip ring induction motor, brushes are connected to External star connected resistors.
Rotor at slip rings
In a 3-phase wound rotor induction motor the short circuit gear is used to short circuit the Rotor at slip rings.
Both (a) and (b)
Reduce the magnetizing current
A smaller air gap in a poly phase induction motor helps to Reduce the magnetizing current.
Its power facts will reduce
In an induction motor, if the air gap is increased Its power facts will reduce.
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