Which component are interpoles connected in series with?

Interpoles are typically connected in series with the armature in a DC machine. The main purpose of interpoles is to improve the performance of the generator or motor by mitigating commutation problems. By being in series with the armature winding, interpoles can generate a magnetic field that helps to counteract the effects of armature reaction and ensure smoother commutation of the current in the brushes. This is particularly crucial at varying load conditions, as it helps to maintain consistent voltage levels and reduce sparking at the commutator.

The armature is the component where the main electrical activity occurs, and since interpoles create additional magnetic fields when the armature is energized, they play a vital role in enhancing efficiency and stability during operation.