Question

What is the formula for the saturation factor?

(a) saturation factor = total mmf required for the magnetic circuit/mmf required for air gap

(b) saturation factor = total mmf required for the magnetic circuit + mmf required for air gap

(c) saturation factor = total mmf required for the magnetic circuit – mmf required for air gap

(d) saturation factor = total mmf required for the magnetic circuit * mmf required for air gap

I got this question in homework.

Asked question is from Operating Characteristics in portion Design of Single Phase Induction Motor of Design of Electrical Machines

Answer 1

The correct choice is (a) saturation factor = total mmf required for the magnetic circuit/mmf required for air gap

The explanation is: The total mmf required for the magnetic circuit and the mmf required for air gap is calculated. On substitution, the saturation factor is obtained.