Electric drill, like burning carbon brush, what are the reasons?
The role of carbon brushes in motors:1. the external current (excitation current) is added to the rotor by carbon brush (input current)2., the static charge on the big shaft is introduced into the earth (carbon brush) through the carbon brush (output current)3. lead the main shaft (ground) to the protection device for rotor ground protection and measure the positive and negative voltage of the rotor4. change the direction of the current (in the commutator motor brush, also plays a role reversal)
The use of electric drill and fever, higher temperature, often used, it is easy to burn the carbon brush!
