Question

What happens in the rotating electrical machine?

(a) armatures are slotted

(b) armatures are slotted and results in the movement of rotor

(c) the rotor remains stationary

(d) the rotor slots are rotating

I got this question during an online interview.

I need to ask this question from Pulsation Losses & Types of Leakages topic in portion Principles of Magnetic Circuit Design of Design of Electrical Machines

Answer 1

The correct option is (b) armatures are slotted and results in the movement of rotor

Easy explanation: In the rotating electrical machine, the armatures are slotted and there is movement of rotor. Due to the movement of the rotor there are rapid changes of local gap reluctance.