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how magnetic poles are formed in dc machines?

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o-khan

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HI
I AM AN ELECTRICAL STUDENT IN NED UNIVERSITY.I AM A BIT CONFUSED ABOUT THIS TOPIC.
 

What exactly is causing the confusion ?
I've taken a course in machinery, and what I recall was that we had stators and rotors.
one part was made out of permanent magnets and the other would be made out of electrical windings which would form magnetic fields and act also as magnets.
what exactly is confusing you in all this ?

salam.
 

a ring rotates between to a north and south pole, a change in the magnetic flux causes a certain voltage around a certain ring which has an specific resistance, ohms law, i=v/r, causes a current trhrough the ring
 

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