The rotor of an induction motor must always turn sufficiently faster than the rotating magnetic field so that magnetic lines of flux will cut through the rotor bars and induce a voltage.

Question

Quizplus · Accepted Answer

In an induction motor, the rotor actually turns slower than the rotating magnetic field produced by the stator. This difference in speed is necessary for inducing a voltage in the rotor bars and generating torque. This difference in speed is known as slip.

The Rotor of an Induction Motor Must Always Turn Sufficiently