Introduction To Brushed DC Motor

The brushless DC motor is a DC motor. The stator of the brushless motor is installed with fixed main magnetic poles and brushes, and the rotor is installed with armature windings and commutators. The electric energy of the DC power supply enters the armature winding through the brush and commutator to generate the armature current. The magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque, which makes the motor rotate to drive the load. Due to the existence of brushes and commutators, the brush motor has complex structure, poor reliability, many faults, heavy maintenance workload, short service life, and commutation spark is easy to generate electromagnetic interference.