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what is principle of DC machines?
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Answer Posted / raja
2 principles
1 is hetropolar
In the case of a hetero-polar generator the
induced emf in a conductor goes through a
cyclic change in voltage as it passes under north and south
pole polarity alternately.
2 is Homo polar
Even though the magnetic poles occur in pairs,
in a homo-polar generator the conductors
are arranged in such a manner that they always move under
one polarity. Either north pole
or south pole could be used for this purpose. Since the
conductor encounters the magnetic
flux of the same polarity every where it is called a homo
polar generator.
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