Abstract: Due to that the structure of the brush holder is not designed rationally, the effective usable part of the carbon brush is very little, and the daily maintenance work of the generator excitation carbon brush increases. The design and installation of the carbon brush of several manufactures and the practical use effects in enduser site were investigated and compared. Combining with the trial use status of the carbon brush in Baotou Power Generation Branch of Huadian Inner Mongolia Energy Company Limited, an energysaving reformation scheme of the brush holder was selected finally, in which the plugin constant pressure brush holder with double controlled and detachable springs wasadopted. After the reformation, favorable energysaving effect was obtained.

Key words: excitation brush holder, carbon brush, energy-saving reformation, generator, efficiency enhancing