What is function of carbon brushes in DC Motor?

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Answer

Function of Carbon Brushes in DC Motor

Carbon brushes are an important component of a DC motor. They play a crucial role in the functioning of the motor. Here are the functions of carbon brushes in a DC motor:

Supplying Electricity: Carbon brushes are responsible for supplying electricity to the commutator. The commutator is a rotating part of the motor that changes the direction of the current flow. The carbon brushes are in constant contact with the commutator, which allows them to supply electricity to the motor.

Reducing Friction: Carbon brushes also reduce the friction between the commutator and the motor. They act as a lubricant, which helps to reduce wear and tear on the motor. This, in turn, increases the lifespan of the motor.

Controlling the Speed: The carbon brushes also play a role in controlling the speed of the motor. By adjusting the pressure on the commutator, the carbon brushes can increase or decrease the speed of the motor. This allows for greater control over the motor's performance.

Conducting Heat: Carbon brushes are also responsible for conducting heat away from the commutator. As the motor runs, it generates heat, which can damage the commutator. Carbon brushes help to dissipate this heat, which helps to prolong the life of the motor.

Replacing Worn Brushes: Finally, carbon brushes are easy to replace when they become worn. This makes them a cost-effective solution for maintaining the performance of a DC motor.

In conclusion, carbon brushes play an essential role in the functioning of a DC motor. They supply electricity to the commutator, reduce friction, control the speed, conduct heat, and are easy to replace when they become worn. Without carbon brushes, a DC motor would not be able to function properly, and its lifespan would be significantly reduced.

Answer

Answer

Carbon brush is a sliding contact used to transmit electrical current from a static to a rotating part in a motor or generator, and, as regards DC machines, ensuring a spark-free commutation. Five brush grade families are used for brush manufacturing.

Answer

Carbon  brushes make contact with the commulator to supply current to the armature in D.C. motor or pass The generated current to the load in D.C. Generator.

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