Commutator (group theory) - Hutchinson encyclopedia article about Commutator (group theory) Printer Friendly
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commutator
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commutator

Device in a DC (direct-current) electric motor that reverses the current flowing in the armature coils as the armature rotates.

A DC generator, or dynamo, uses a commutator to convert the AC (alternating current) generated in the armature coils into DC. A commutator consists of opposite pairs of conductors insulated from one another, and contact to an external circuit is provided by carbon or metal brushes.



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