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Squirrel-cage rotor of an induction motor

Developed view of a squirrel-cage rotor in a 2-pole field in the rotor reference frame: The sinusoidally distributed flux density wave is moving at slip speed ω_slip  inducing in the rotor cage voltages proportionall to slip speed and corresponding value of the flux density (in accordance with Faraday Blu rule). Assuming that the rotor is purely resistive, currents will be produced in phase with the induced voltages. These bar currents are shown in the simulation together with the resulting rotor-mmf distribution and corresponding fundamental sinusoidal distribution, all moving at  slip speed. Note that the flux density wave is 90^o ahead of the rotor mmf The electromagnetic torque acting on the rotor is directed to the right.