Carbon brush is also known as brush, as a sliding contact, in many electrical equipment has been widely used. Carbon brush in the product application materials are mainly graphite, dipped in graphite, metal (including copper, silver) graphite. A device that transfers energy or signals between a fixed part of a motor or generator or other rotating machine. It is usually made of pure carbon and coagulant. The exterior is usually a square, stuck on a metal bracket, inside There is a spring to press it on the shaft, the motor rotation, the power through the inverter delivery to the coil, because its main component is carbon, called carbon brush, it is Carbon Brush easy to wear. Should be regularly replaced and clean up the carbon.
The look of the carbon brush is like a rubber band with a pencil, and there is a wire on the top. The volume is very small. Carbon brushes as a sliding contact, in many electrical equipment has been widely used. Product materials are mainly electro-graphite, dipped in graphite, metal (including copper, silver) graphite
Carbon brush its role is mainly on the metal friction at the same time conductive; it is not like metal metal friction when the same; metal friction on the metal when the friction; friction may increase; while the transfer of the place may be sintered together; Carbon brush is not; because carbon and metal are two different elements; its use is mostly used in the motor; shape is a variety of; a round and so on.
Carbon brush for a variety of motors, generators, wheel machine. Has a good commutation performance, long service life. Carbon brush is used in the commutator or slip ring of the motor, as the sliding contact body for the introduction of the introduction current, it is conductive, thermal and lubrication performance is good, and has a certain mechanical strength and commutation spark instinct. Almost all motors use carbon brushes, which are important components of the motor. Widely used in a variety of AC and DC generators, synchronous motors, battery DC motor, crane motor assembly ring, all types of welding machines and so on. With the development of science and technology, the type of motor and the use of working conditions are becoming more and more diversified
Carbon Brush Specific role
1. Apply an external current (excitation current) to the rotating rotor (input current) through a carbon brush;
2. The static charge on the large axis through the carbon brush into the earth (grounding carbon brush) (output current);
3. The large shaft (ground) to the protection device for the rotor ground protection and measurement of rotor positive and negative ground voltage;
4. Change the direction of the current (in the commutator motor, the brush also plays a commutation)
In addition to induction AC asynchronous motor no outside. Other motors have, as long as the rotor has a ring to have.
The principle of power generation is the magnetic field after cutting the wires in the wire to produce current. The generator is used to cut the wire by rotating the magnetic field. The rotating magnetic field is the rotor, and the cut wire is the stator