RE: [TCML] Controlling Speed of an AC (Muffin) Fan

["McCauley, Daniel H" <daniel.h.mccauley@xxxxxxxx>]

For variable speed rotary spark gaps, we use Universal AC motors.  Then just use a variac to vary the speed.
For fans, just always run full tilt.  No reason to throttle those back.


Dan
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Brandon Hendershot wrote:
> Alright,
> 
> So I plan on purchasing this: 
> http://www.mpja.com/prodinfo.asp?number=17780+FN AC muffin fan and I 
> need a way to vary its speed. I was thinking of using a rheostat, but 
> Paul suggests otherwise. Then I thought of using a dimmer switch, but 
> I remember trying to control my drill press with my variac (kinda the 
> same, right?). It wouldn't work because you need to control the 
> frequency of the electricity, not the voltage like you do with most DC 
> motors.

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