Question

What is the classification of the iron loss due to the main field?

(a) hysteresis loss

(b) eddy current loss

(c) hysteresis loss or eddy current loss

(d) hysteresis loss and eddy current loss

I got this question during an interview for a job.

My question is based upon Losses and Temperature Rise topic in chapter Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Correct answer is (d) hysteresis loss and eddy current loss

To explain I would say: The iron loss due to main field is due to the hysteresis loss. The eddy current loss also contribute to the iron losses due to main field.