Question

A particular load is to be driven at about 700 r.p.m. What should be the number of
poles for a three phase induction motor when
1. f= 60 Hz
2. f = 50 Hz
Calculate the actual speed in each case if
the rated slip is 4% ?
​

Answer 1

0.16 to 0.18

An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 700 rpm. The frequency of the rotor current of the motor in Hz is ____________.