Armature

The armature is the rotating component of the starter. It is located between the drive and commutator end frames and the field windings. When the starter motor operates, the current passing through the armature produces a magnetic field in each of its conductors. The reaction between the armature’s magnetic field and that of the field coils causes the armature to rotate. This creates the torque required to crank the engine.

Recommended reading: sinotruk howo truck