Assume we went to construct an induction motor and we use permanent magnet and you may know that DC current is not supply in this case (rotor is made from only shorted copper or other bars).
Can change of flux be produced on the rotor?
According to Faraday's Law, you will get a current in a coil when the amount of magnetic flux linked with the coil changes. But in case of the permanent magnet, your field is fixed. My question is do can a permanent magnets generate electric current in induction motors?