ABSTRACT
Eventually, fiber brushes may displace monolithic brushes everywhere. Initially the most likely applications of fiber brushes will be homopolar motors/generators, but they should spread to all types of brush motors as costs come down and reliability is established. The driving force will in the first instance be the low heat loss and voltage drops of about 0.1 V and less where monolithic graphite brushes require 1 V.* Another driving force will be the extremely low noise of fiber brushes (see Fig. 20.7). And yet another is their very high current density capability which makes them supremely suited for miniaturization. And finally, they will be irreplaceable whenever very high current density is needed, if even in short pulses.
