1.

A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. The number of poles of this motor is?(a) 4(b) 6(c) 5(d) 2The question was asked during an interview for a job.This interesting question is from Rotor Frequency in section Induction Machines of Electrical Machines

Answer»

Correct CHOICE is (a) 4

Easy explanation: P = 120f/N = 120*50/1440 = 4(1/6). The NUMBER of the poles should be whole number and must be even. So number of poles must be 4.



Discussion

No Comment Found

Related InterviewSolutions