What is a armature air gap?

The armature air gap refers to the space between the armature (the rotating part) and the stator (the stationary part) in electric machines such as motors and generators. This gap is crucial because it affects the magnetic field strength and efficiency of the machine. A smaller air gap generally leads to higher efficiency and performance, but it can also increase manufacturing complexity and costs. Managing the air gap is essential for optimal machine operation and longevity.