In the world of DC motors, the brushed DC motor is a well-known type. This type of motor consists of a stator that contains stationary main magnetic poles and brushes, as well as a rotor that has armature windings and commutators. These elements work together to create the motor's motion.
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.