Why Need To Replace The Carbon Brush In Brushed Motor Regularly?
As the motor rotates, different coils or different two poles of the same coil are energized at different times, so that the NS pole of the magnetic field generated by the coil and the NS pole of the closest permanent magnet stator have a suitable angle difference, and the magnetic fields are attracted and heterogeneous. Repel, generate power, and drive the motor to rotate. The carbon electrode slides on the coil terminal, like a brush on the surface of the object, so it is called carbon "brush".
Sliding with each other will rub the carbon brush and cause loss, and the carbon brush needs to be replaced regularly; the on and off of the carbon brush and the coil terminal alternately, sparks will occur, electromagnetic breaks will occur, and electronic equipment will be interfered.