how do 3 phase induction motor works?
Three phase induction motors don’t get a supply directly to the rotors armature conductor.It has a stator and a rotor.The stator is fixed while the rotor is the movable component. When you give 3 phase Ac supply to the stator primary, the stator field get’s excited and it produces a rotating magnetic field which rotates at synchronous speed. Synchronous speed is given by Ns=120xf/P Where f is the frequency of the supply and P is the number of poles. The rotating magnetic field sweeps the coils of the rotor, it induces a current an emf in them and due to the resistance of the rotor winding, current starts to flow in the rotor circuit and a magnetic field is developed in the rotor due to the inducing effect of the stator.Magnetic fields of the the stator and the rotor go one attraction and repulsion which gives rise to Torque that moves the rotor, but the interaction between the two magnetic fields give rise to a relative speed between the stator and the rotor, which is why rotor always
