Question

How is the flux distributed in the field form?

(a) to reduce the high voltage

(b) to reduce the high current

(c) to reduce the harmonics

(d) to keep the total reluctance low

I had been asked this question in an interview for job.

The query is from Field Form, Harmonic Analysis of Flux Distribution Curve in portion Principles of Magnetic Circuit Design of Design of Electrical Machines

Answer 1

Correct option is (d) to keep the total reluctance low

For explanation I would say: The flux in passing from poles into the armature, does not confine itself over the pole arc but spreads out over the entire pole pitch. The flux will distribute itself in the air gap in such a way that the total reluctance is minimum.