Air gap — what is it and why is it important?
Air gap is the physical gap between a rotor and stator core in an AC machine, or between the armature and fields / interpoles in a DC machine. The role of the air gap is not as simple as it appears.
Topics discussed in this article include:
- Important principles (magnetic force and the amount of current to drive flux through air)
- Air gap in AC machines
- Air gap in DC machines