Question

What is the range of the ratio of the total cross section of rotor bars to the total stator copper section for main winding for copper?

(a) 0.4-0.8

(b) 0.3-0.7

(c) 0.5-0.8

(d) 0.8-0.9

This question was posed to me in an interview for job.

Query is from Design of Rotor in section Design of Single Phase Induction Motor of Design of Electrical Machines

Answer 1

Correct choice is (c) 0.5-0.8

Explanation: The minimum value of range of the ratio of the total cross section of rotor bars to the total stator copper section for main winding is 0.5. The maximum value range of the ratio of the total cross section of rotor bars to the total stator copper section for main winding is 0.8.