A 3-phase, 4 pole, 400 V, 50 Hz, squirrel-cage induction motor is operating at a slip of 0.02. The speed of the rotor flux in mechanical rad/sec sensed by stationary observer, is closest to
Right Answer is:
Given a 3-phase, 4P, 50 Hz, 400 V Squirrel-cage induction motor.
Slip = 0.02
Speed of rotor flux with respect to the stationary observer in mechanical radians per second will be
ωm = (2 × 2πf)/P
= (2 × 2 × π × 50)/4
= 50π = 157 mech rad
The speed of the rotor flux is nothing but the synchronous speed.
= 157 mech rad/sec