The Freescale app note below suggests that a typical ceiling fan
induction motor can be speed controlled using a basic phase controlled
TRIAC "dimmer".

Fan and dimmer and I are not to hand as I write, so rather than going
and blowing uo a dimmer in the pursuit of knowledge, what do people
think of this?


http://cache.freescale.com/files/microcontrollers/doc/app_note/AN3471.pdf

If single phase motors can be speed controlled this was then people
would do it in droves.
I have severe doubts about this circuit.

But, Freescale must be right. No?

Thoughts.




 Russell
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