There are such affinity with the rotary machine and material, the difficulty does not go straightforward carbon brush.
By recent years, automatic control semiconductors and developed, come to be the more severe use, brush themselves and DC machine was also progress with the improvement of maintenance technology, reliability as a whole is growing, but brush There is also a hard surface that is to keep the performance just completely number of planning with respect.
Is the role of the brush, commutator, which rotates, is responsible or passing a current through the slip ring.
In the armature windings of the DC generator, electromotive force induced in exchange, you get direct electromotive force is rectified by the action of the commutator it.
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