SECTION 1 -INTRODUCTION TO BRUSHES AND CARBON GRADES
Question 1:2 Why Is Carbon Used?
Carbon is one of the most common elements on earth and has thousands of compounds which range from greasy graphite to diamond, the hardest known substance.
Carbon is truly amazing element as it conducts current like a metal, but unlike typical metals, it des not melt. Carbon changes directly from a solid to a gas at a temperature of 3000-4000 degree Celsius. This has a huge benefit for carbon brush applications as it will not "weld" to a commutator or slipring.
Carbon is lighter than most metals, even aluminium, which is a great benefit because the low inertia enables it to follow small irregularities of the moving surface more easily.
Carbon is very stable and exhibits virtually no expansion in its base forms. Carbon also has the characteristic that its coefficient of friction decreases as the temperature approaches the operating temperature of a normal rotating machine.
Question 1:3 How Is The Carbon Brush Material Made?
The information has been drawn from experience of Morganite Taiwan Limited Application Specialists combined with a wide range of published information from major carbon supplier and motor manufacture. However, the material can not be downloaded, copied or used without written permission.
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