What are the common faults of carbon brushes?

2021-08-23 11:27:44

What are the common faults of carbon brushes? There are many different types of carbon brush failures. The common types of failures are listed below:

Quality: The wrong choice of carbon brush material will shorten the life of the carbon brush, and may shorten the service life of the motor, because if you choose a quality higher than the required quality, the carbon brush may be damaged.

Size: Once the brushes wear out, their size will change, which usually happens with wearing parts. Therefore, it is important to know the size of the brush in advance.

Spring: The higher or lower pressure to keep the brush on the motor may change the service life of the brush.

Working temperature: Higher working temperature (70º-120º) will change the properties of the material and bend the brush itself.

Cable part: Even if the material and size of the brush are selected correctly, the wire used to carry the current needs the part to manage the current in the system. This may cause the brush to overheat and possibly break.

Other problems affecting wires are incorrect placement or incorrect terminal selection.

If in doubt when choosing a material, it is recommended to choose a soft material and gradually increase the hardness. Generally, the harder ones will generate sparks and damage the current collector of the motor.