Question

What is the formula for the area of cross-section of pole body for rectangular poles?

(a) area of cross section of pole body = 0.98 * axial length of the pole * breadth of the pole

(b) area of cross section of pole body = 0.98 / axial length of the pole * breadth of the pole

(c) area of cross section of pole body = 0.98 * axial length of the pole / breadth of the pole

(d) area of cross section of pole body = 1/0.98 * axial length of the pole * breadth of the pole

This question was posed to me during an interview.

Question is taken from Design of Rotor in division Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Right choice is (a) area of cross section of pole body = 0.98 * axial length of the pole * breadth of the pole

Explanation: The axial length of the pole and the breadth of the pole are calculated. Next by multiplying the two values with the stacking factor, we get the area of cross section of pole body.