The role of carbon brushes for power tools

The function of carbon brushes is mainly to conduct electricity while rubbing metal; It's not like metals conduct electricity through friction; When metals are conducted by friction; Friction may increase; At the same time, the intersecting places can be sintered together; Carbon brushes don't; Because carbon and metal are two different elements; Most of its use is in electric motors; The shapes are varied; Square, round, and so on.
In the commutator motor, the brushes also play a commutation role and can change the direction of the current;
The grounding brush can output a current to introduce the electrostatic charge on the large shaft into the ground through the carbon brush;
An external current (excitation current) is applied to the rotating rotor via a carbon brush (input current). motor carbon brushes;
A protective device that directs the large shaft (grounding) to the rotor grounding protection and measures the positive or negative of the rotor. The ground voltage commutator consists of brushes and commutation rings, and carbon brushes are one of the brushes.