Question

What is the formula for the stored energy at any position?

(a) stored energy at any position = mmf per slot^2 * permeance in a particular position

(b) stored energy at any position = 2 * mmf per slot^2 * permeance in a particular position

(c) stored energy at any position = 1/2 * mmf per slot^2 * permeance in a particular position

(d) stored energy at any position = 1/3 * mmf per slot^2 * permeance in a particular position

I got this question in an online quiz.

My question is from Pulsation Losses & Types of Leakages topic in section Principles of Magnetic Circuit Design of Design of Electrical Machines

Answer 1

Right answer is (c) stored energy at any position = 1/2 * mmf per slot^2 * permeance in a particular position

To elaborate: First the mmf per slot along with the permeance in a particular position is calculated. On substitution, the stored energy at any position is calculated.