AVR-Chat

On Tue, 2005-09-06 at 16:51 -0400, Tom Becker wrote:
> > ... If it has only two leads, it is NOT a BLDC motor. Period.
> Perhaps my confusion comes from experience.  I have PWM'd two-lead 
> maglev brushless DC blowers 
> (http://www.sunon.com.tw/products/pdf/2005dc-maglev.pdf), and I've
> PWM'd small brushless DC gearhead motors 
> (http://www.copal-usa.com/PDFs/LB16-030-AA.pdf).  Since these contain 
> integrated driver electronics, each offers only two leads; PWM'ing
> these motors' power supply to moderate speed works fine and there is
> no identifiable relationship between PWM frequency and motor speed as,
> I think, one should expect.  There are, it appears from a quick
> search, many more examples that are as you describe, open-coil motors
> that need a multiphase driver or controller to operate.  Perhaps my
> confusion was a matter of scale.  Thanks for the, uh, clarification.

  Ineed to cease being so assertive. Sorry.

  In my view, what you are treferring to uis a motor/controller module,
not a "motor" per se`.   If you look inside, I believe you'll find that
the MOTOR has more than two leads, regardless of the wiring of the
module as a whole..

  Either way, I was excessively forceful in my comments. Again, my
apologies. (being an opinionated ass can have its drawbacks, you know?)

Tom