A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor current will be
The frequency of the rotor current can be calculated using the formula:
fr = s * f
fr is the frequency of the rotor current
s is the slip
f is the supply frequency.
Substituting the given values, we get:
fr = 0.04 * 50 = 2 Hz
Therefore, the frequency of the rotor current is 2 Hz. This means that the rotor current is alternating at a rate of 2 cycles per second, or 2 Hz, with respect to the stator field.