how induction motor starts
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When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor begins rotating and the induction motor starts. At the time of starting, the motor slip is unity, and the starting current is very large.
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The starting is relatively simple. 3-ph A.C supply is provided to the stator windings and that produces a rotating magnetic field. This rotating magnetic field flux links the rotor windings , induces emf(Faraday's Principle+ Lenz's Law), induced emf causes induced current(rotor winding is short circuited) which gives rise to a magnetic flux of it's own. This magnetic flux interacts with the rotating magnetic field flux and a deflecting torque is produced which would cause the motor to run.
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