Carbon brushes are generally used in DC motors to realize phase commutation in cooperation with a commutator, convert DC power into “AC power”, and drive the DC motor to rotate. Nowadays, brushless DC motors are more and more widely used. They use thyristor circuits instead of brushes to realize commutation, which can achieve high speed, large capacity and low noise. Some AC motors also use carbon brushes and conductive rings. For example, its rotor has windings, so how to provide current to the rotating rotor? Carbon brushes can be used with conductive rings.
When the operator’s generator carbon brush is seriously ignited, broken, and the brush braid becomes hot and red, etc., the operator should replace it immediately, and the following matters and methods should be paid attention to when replacing:
1. The replacement work must be carried out by two people and by the main watchman himself.
2. When changing, the staff should wear work clothes, fasten the cuffs, and stand on the insulating pad. It is forbidden to wear short-sleeved shirts or roll up the sleeves. Female workers should roll their long hair into the safety helmet.
3. It is forbidden to touch the two poles or one pole and the grounding part with both hands at the same time, and two people are not allowed to work at the same time.
4. Lift the pre-replaced carbon brush out of the brush holder, hold it in your hand, then loosen the brush braid screw and remove the carbon brush.
5. Hold the polished carbon brush in your hand, tighten the brush braided screw, and then press the carbon brush into the brush holder with a constant pressure regulator.
6. Under normal circumstances, only 1-2 carbon brushes are allowed to be replaced for each brush holder at the same time. The replaced carbon brushes must be ground in advance, and the new and old carbon brushes must be the same model.
Post time: Apr-28-2022