In a message of 29 Mar 95  06:38:50, John Kauk wrote:
JK> The rotor only has neodym magnets on it, no windings. 
JK> 
JK>  MC> I think they still have slip rings with brushes.  They 
JK> 
JK> No  brushes. Thus, the brushless name  ;-)  There _is_ a small set of
JK> magnets for the controller's sensor, at the end where you would expect to
JK> see brushes.
    The larger motors do have windings in the rotor.  You can't make a 
permanent magnet motor much over 5 Hp without it getting VERY expensive.  
High current tends to demagnetize the magnets.
          MC
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