The electric driven motors have an armature, an electric motor commutator, and either a wound or an enduring magnet stator. An electric power source feeds the rotor windings through the commutator and its accompanying paint brushes, which for the time being magnetizes the rotor center in an exact direction.
As the rotor turns, the commutator swaps power, double-checking that the magnetic beams of the rotor manage not ever align with the magnetic beams of the stator field. This double-checks that the rotor not ever stops.
There are motors with changing number of beams but this actually counts on the dimensions of the engine and how it is being used. There are some which use very uncommon but mighty magnets which can increase the power a lot; although, this makes the engine very expensive. Today, the commutator is not as well utilized as electronics are now routinely utilized which will relieve the engine from sparking and unchanging servicing.