SHENZHEN DONGMING MOTOR CO., LTD.
The brushes of DC motor are made with carbon or graphite structures, making sliding contact over the rotating commutator. The brushes are used to relay the current from external circuit to the rotating commutator form where it flows into the armature winding. So, the commutator and brush unit of the DC motor is concerned with transmitting the power from the static electrical circuit to the mechanically rotating region or the rotor.
For brush dc motor, there are mainly carbon brush and electric brush dc motor. For electric brush dc motor, the terminal is made of tin plate. It is not much stronger as cooper, but with a better circuit transfer condition. It is also the easily seem type motor in our daily life.
The following is a comparison of carbon brush motor and electric brush motor
|Type||Electric Brush DC motor||Carbon brush DC motor|
|Terminal Material||Tin plate||Copper|
|Continuous Working||500-600 hours||600-800 hours|