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Why induction motor develops a torque?
Working principle of three phase IM is that we supply 3 phase AC supply to stator. Current flows and rotating magnetic field is produced in it. These lines interact with rotor.
Rotor has conducting rods on it which are insulated from each other along the length but connected at the end. Due to magnetic field lines, emf is induced in it and current starts flowing.
This current produces its own magnetic field along with main magnetic field of stator and produces torque.
Remember that rotor cannot rotate at speed equal to stator in induction motor. If it will than no torque will be produce and hence rotor will not move
Rotor has conducting rods on it which are insulated from each other along the length but connected at the end. Due to magnetic field lines, emf is induced in it and current starts flowing.
This current produces its own magnetic field along with main magnetic field of stator and produces torque.
Remember that rotor cannot rotate at speed equal to stator in induction motor. If it will than no torque will be produce and hence rotor will not move