Working Principle of Three Phase Induction Motor
Stator: Stator of three phase induction motor is made up of numbers of slots to construct a 3 phase winding circuit which is connected to 3 phase AC source. The three phase winding are arranged in such a manner in the slots that they produce a rotating magnetic field after AC is given to them.
Secrets behind the rotation:
Here the relative velocity between the rotating flux and static rotor conductor is the cause of current generation; hence as per Lenz's law the rotor will rotate in the same direction to reduce the cause i.e. the relative velocity.
Thus the three phase induction motor is:
• Less armature reaction and brush sparking because of the absence of commutators and brushes that may cause sparks.