Renown - Carbon Brush Service
A carbon brush is an electrical conductor that transmits current from stationary motor wires to rotating components within the motor. Since carbon brushes can transmit electrical current without sparks, they are ideal for current transmission in a variety of motors and generators. In order to meet the varied needs of different systems, carbon brushes are available in a wide range of grades and designs. Each grade is specifically designed to meet particular conducting needs. Some motors or generators may require more than one carbon brush.
Carbon has largely replaced copper as the ideal material for motor brushes. Unlike copper, carbon-based brushes exhibit a high level of contact and arc resistance. In addition, carbon brushes create less friction than their copper counterparts, facilitating smoother overall operation.
To derive the desirable characteristics for each grade, the raw material is exposed to different temperatures, pressures, and processing times. Carbon brushes are divided into grades based on their materials and designs:
- Carbon graphite
- Electrographite
- Graphite
- Metal graphite
Carbon brushes in Electric Motors & Generators transfer current from the stationary parts of a motor to rotary components. Although they are called brushes, carbon brushes actually consist of a solid block of carbon with bevels or angled corners tailored to fit the specific parameters of the motor in which they are used.
The flow of current from stationary to rotating components within an electrical motor is more easily controlled through the use of carbon brushes. A spring mechanism holds the carbon brush against rotating components, such as rotary shafts, commutators, or slip rings. Small, evenly spaced contact spots on the brush limit the amount of electricity conducted at a given time, ensuring a steady and reliable flow of current without undue wear on any one area of either the brush or rotating parts.