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The Carbon Brush Holder Acts As A Fixed Carbon Brush In The Motor

Jun 14, 2017

The Carbon Brush holder acts as a fixed Carbon Brush in the motor

Carbon Brush assembly made of Carbon Brush, Carbon Brush, pull spring and other components composed of Carbon Brush made of glass fiber reinforced plastic material, both sides of the opening, the opening embedded with a carbon play bar about one, the middle by the tension spring connection, the appropriate change The length of the spring, so that the role of Carbon Brush on the slip ring on the size of moderate, in the assembly, can be adjusted to ensure that the sensitivity requirements.

    Carbon Brush holder in the motor plays a fixed role in the role of Carbon Brush, Carbon Brush holder directly affect the quality of the use of motor performance.

The use of Carbon Brush

    The role of Carbon Brush in the motor:

    1. Add the external current (excitation current) to the rotating rotor (input current) through the Carbon Brush.

    2. The static load on the large axis through the Carbon Brush into the earth (ground Carbon Brush) (output current)

    3. The large shaft (ground) to the protection device for the rotor to protect and measure the 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.

    In order for the rotor to generate a magnetic field, it is necessary to input a magnetizing current to the coil of the rotor. Carbon Brush is used to force the magnetic generator generated by the magnetic current into the rotor coil.

    Only commutator or slip ring inside the motor have a Carbon Brush, the ordinary AC asynchronous motor is a squirrel cage structure, no Carbon Brush. The motor is the short name of the motor, that is, the motor. Motor can be divided into DC motor and AC motor, DC motor due to the rotation of the rotor, according to the coil in the constant magnetic field changes in the direction of constantly changing the direction of the current, so the DC motor coil needs a commutator.

    Commutator by the brush and commutation ring composition, Carbon Brush is a brush. As the rotor rotation, the brush is always with the commutator ring friction, and in the moment of commutation will produce EDM, so the brush is a DC motor in the wearing parts.

    In order to improve the DC motor life, operating stability and reduce the DC motor noise and electromagnetic interference, brushless DC motor has gradually replaced the trend of brush motor.

The big shaft (ground) lead to the protection device for the rotor to protect and measure the rotor positive and negative voltage to the ground commutator by the brush and commutation ring composition, Carbon Brush is a brush. As the rotor rotation, the brush is always with the commutator ring friction, and in the moment of commutation will produce EDM, so the brush is a DC motor in the wearing parts. In order to improve the DC motor life, operating stability and reduce the DC motor noise and electromagnetic interference, brushless DC motor has gradually replaced the trend of brush motor. General AC motor without constant magnetic field, so do not need commutator, it does not need brush; but the size of the AC motor is generally relatively large. Household electrical appliances used in the motor are generally AC motors, such as fans, washing machines, refrigerators, air conditioning and so no Carbon Brush, but there are also using DC motors, such as many electric shavers, kitchen small appliances, electric bicycles and so have Carbon Brush, that is, DC motor (not including brushless) have. The motors that use the dry batteries are DC motors.