Does the motor have a good brush or no brush?
The carbon brush looks a bit like a pencil eraser, with a wire on top. There is a lot of small size. As a sliding contact, carbon brushes are widely used in many electrical devices. The products are made of graphite, lipographene, metal (copper, silver) graphite.
Carbon brush: carbon brush motor or generator or other fixed part of the rotating machinery and rotational part between energy or signal transmission device, it usually is made of pure carbon and solidifier, appearance is generally square, card on the metal stents, there is a spring pressed it on the shaft, such as oil drilling is completed, need to be tested, from wellbore put instrument, is through the carbon brush will signal from rotating parts (outsourcing wire cable reel) to the ground of the instrument
Brush refers to brush, brush dc motor, brush and commutator of the friction and unable to avoid sparks, but relatively speaking, simple control circuit. So, for control, there is a good control of the brush. But for users, a brushless motor clearly has a long life.
