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Re: Re: Dimmer with AC motor?

From: rod prouse   rodprobconnex.net
Date: Fri, 27 Oct 2000 05:01:06 -0700

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I had a problem with a celing fan that made a lot of noise with the dimmer
type control..the solution was a devise called a 'veriac'..it looked like a
giant variable resistor or volume pot but it worked great as a fan motor
speed control   rod prouse

> From: mike_steventon@xxxxxxxxxxxxxx
> Date: Thu, 26 Oct 2000 22:15:44 -0400
> To: "Rob Cruickshank" <robcruic@xxxxxxxxxxxx>
> Cc: arg-list@xxxxxxxxxxxxxxx
> Subject: Re: ARG: Re: Dimmer with AC motor?
> 
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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.
> 
> Mike
> 
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