Question

How much does the addition iron losses relate with the supplied power?

(a) additional iron losses = 0.5% of supplied power

(b) additional iron losses = 0.6% of supplied power

(c) additional iron losses = 0.8% of supplied power

(d) additional iron losses = 0.9% of supplied power

The question was posed to me during an online exam.

This intriguing question comes from Losses and Efficiency topic in portion Three Phase Induction Motor of Design of Electrical Machines

Answer 1

The correct option is (a) additional iron losses = 0.5% of supplied power

The explanation is: The additional iron losses are a small amount when compared with the supplied power. They are 0.5% of the supplied power.