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Permanent Magnet machines

  1. Oct 1, 2012 #1
    Hi,

    when a perment magnet machine is designed for a particular power but is operated at a much lower power, is it inefficient as with induction machines?

    Thanks
     
  2. jcsd
  3. Oct 1, 2012 #2
    No it isn't. That's why all small motors use permanent magnets.
     
  4. Oct 2, 2012 #3

    russ_watters

    User Avatar

    Staff: Mentor

    There may be a misunderstanding here: a permanent magnet motor still uses electromagnets too.
     
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