A brushed DC motor is a type of DC motor. The stator of the brushed motor is equipped with fixed main magnetic poles and brushes, and the rotor is equipped with armature windings and commutators.
The electrical energy of the DC power supply enters the armature winding through the brushes and the commutator to generate an armature current. The magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque, which causes the motor to rotate and drive the load. Due to the existence of brushes and commutators, brushed motors have complex structure, poor reliability, many failures, large maintenance workload, short life, and commutation sparks are prone to electromagnetic interference.