In an induction motor, the rotor is induced by what?

In an induction motor, the rotor is induced by what?

• A. The rotor is powered by external drive
• B. The rotor uses permanent magnets
• C. The rotor is driven by friction
• D. The rotor is induced by the stator's magnetic field

Answer: (D)

The rotor in an induction motor is driven by electromagnetic induction from the stator. When the stator windings are energized with AC, they create a rotating magnetic field. This rotating field passes through the air gap and cuts across the rotor conductors, inducing currents in the rotor according to Faraday’s law. Those rotor currents generate their own magnetic field, which interacts with the stator field to produce torque and spin the rotor. The rotor isn’t powered externally and doesn’t rely on permanent magnets, and friction isn’t what drives it. The slip between the rotor speed and the rotating field keeps induction and torque flowing.

The rotor in an induction motor is driven by electromagnetic induction from the stator. When the stator windings are energized with AC, they create a rotating magnetic field. This rotating field passes through the air gap and cuts across the rotor conductors, inducing currents in the rotor according to Faraday’s law. Those rotor currents generate their own magnetic field, which interacts with the stator field to produce torque and spin the rotor. The rotor isn’t powered externally and doesn’t rely on permanent magnets, and friction isn’t what drives it. The slip between the rotor speed and the rotating field keeps induction and torque flowing.