In a message to Rodney Davis on Mar 24 95, Mark Corona wrote:
 MC> congiguration.  The controller generates a rotating 
 MC> magnetic field inside the motor and the rotor has windings 
 MC> as well.
The rotor only has neodym magnets on it, no windings. 
 MC> I think they still have slip rings with brushes.  They 
No  brushes. Thus, the brushless name  ;-)  There _is_ a small set of magnets 
for the controller's sensor, at the end where you would expect to see 
ushes.
 MC> used in aircraft right now.  They probably need the airflow 
 MC> since they pack a lot of watts into a small motor.
From what I've seen and read, they run cooler than conventional motors at 
comparable power levels. The US F5B team ran Aveox motors at the  World 
Championships this year, and one of it's members won the individual title 
(can't recall his name).I've read that they used a controller designed by 
Steve Neu that operated the drive system at around 90% efficiency...
TTYL
--JDK--
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