Re: TSG construction article

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Esondrmn-at-aol-dot-com>

In a message dated 12/19/01 7:48:49 AM Pacific Standard Time, tesla-at-pupman-dot-com
writes: 



>
> Hello Ted and Ed, 
>
> As I understood it, the resisters across the output of the dimmer keep the 
> triac turned on during the time that the current is building up in the coil 
> primary.  The low resistance kept the jitter and noise in the circuit down. 
> The problem with the inductive load is that the triac can turn off due to 
> lack of holding current (while the inductor current is building) and on 
> again.  When this happens many times in succession during each half cycle, 
> the triac burns out. 
>
> http://www.epanorama-dot-net/documents/lights/lightdimmer.html#inductive 
> has some information on dimmers. 
>
> I remember a site that had a modified dimmer with an extra triac to keep 
> voltage on the gate of the power triac to avoid the above problem in driving 
> an inductive load, but I can't find it. 
>
> Regards, 
>
> Pete Komen 
>




Are folks having better success with fan control dimmers than with light
dimmers?  You would think the fan control dimmers that are designed to work
into an inductive load would be more stable and robust. 

Ed Sonderman