Engineering What Device Reverses the Poles of a Magnet in a Generator/Motor?

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The discussion centers on identifying the device that reverses the poles of a magnet in a generator or motor. A commutator is suggested as the appropriate device for this purpose. Participants emphasize the importance of understanding the underlying physics for effective application. Additional resources, such as the Physics Forums guidelines, are recommended for further learning. The conversation highlights the collaborative nature of the forum in assisting with technical inquiries.
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i am making a generator/motor and need to know what the device is called that reverses the poles of a magnet and where can i get/make one
 
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A commutator?
 

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