Question

In a three-phase squirrel-cage induction motor, the rotating magnetic field is produced by:__________
a. two electromagnets placed at right angle from each other and two sine wave currents phase shifted of 90° from one another.
b. three electromagnets placed at 90° from each other and three sine wave currents phase shifted of 120° from one another.
c. three electromagnets placed at 120° from each other and three sine wave currents phase shifted of 120° from one another.
d. three electromagnets placed at 120° from each other and three sine wave currents phase shifted of 90° from one another.

Answer 1

Answer: Option C -- three electromagnets placed at 120° from each other and three sine wave currents phase shifted of 120° from one another.

Explanation:

In a three-phase squirrel-cage induction motor, the rotating magnetic field is produced by three electromagnets placed at 120° from each other and three sine wave currents phase shifted of 120° from one another