# Physics

what is the role of a commutator in a DC motor?

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asked by Liz
1. reverses current in armature as the shaft turns so that torque is always in the same direction.
http://electronics.howstuffworks.com/motor5.htm

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posted by Damon
2. That link is to the commutator page. Go back one page in the link to see why the current in the armature electromagnet must be reversed every half turn.

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posted by Damon

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