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RE: ARG: Re: Dimmer with AC motor?

From: Danger Hotrod   dangerwaste.org
Date: Thu, 2 Nov 2000 19:47:51 -0800

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> >Inductors, like the coils in a motor, dislike having the current  through
> >them changed abruptly, and produce large voltage spikes. These can fry
> >the triac in the dimmer. They can also, if severe enough, break down the
> >insulation in the windings of the coil. I blew up a transformer this way
> >once,  using a solid
>
> Yep, that is my experience. I tried to control some fan motors with
> dimmers. It worked for a while and then burned out.
>

New to the list...hi

I tried this once too and it kind of worked, but was really touchy.  There
was a point turning the dimmer where it suddenly started affecting the motor
speed, but if you went too far, it would just stop.  Also, even if you could
get the dimmer set just right to set the motor speed where you wanted it,
it would rarely stay at that speed over time.  It was really unreliable.  It
didn't burn out though.

So is there a cheap easy way to control the speed of a motor reliably?

>A good reference for this stuff is "Electric Motors and Control
>Techniques" by Irving Gottlieb from TAB books.

Do you need to understand electronics well in order for this book to be
useful?

My electronics right now are SOOOOOPER basic (trying to learn though!)
 ________________
|Aaron Prust     |
|danger@xxxxxxxxx|
|Minneapolis, MN |
|________________|


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