Quote:
Originally Posted by T-Cut
Sorry, I honestly thought your question about brushes was a joke. So no, the brushes are fixed in position and are in rubbing contact with the commutator. The commutator rotates as part of the armature, which has the fan blades fitted on the end of its central shaft. Power to the armature windings is supplied via the brushes.
From any point on the armature, the brushes appear to rotate around, it so the answer to your question was yes. That's what I meant by relativistically. (Blame Einstein.)
TC
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That's ok. It wasn't really a question, just an observation that the uninitiated may think the brushes (originally copper brushes I believe, hence the term), actually rotated.