Re: [TCML] SCR tesla coil

[Eric Goodchild <ericgoodchild@xxxxxxxxx>]

Although an SCR could be used in a situation like a DRSSTC where the switch
only has to conduct in one direction anyway.
Keep in mind that such a coil would have to have a very low Fres as SCRs
are very slow.


Eric

On Mon, Nov 21, 2011 at 6:50 PM, <bturner@xxxxxxxx> wrote:

> Has a lot to do with the trigger (gate) capacitance I would figure. Other
> point is that an SCR only conducts in one direction, thus defeating the
> whole idea of a spark gap. Perhaps in some sort of a PWM DC style,
> changing the duty cycle of the current pulse into the primary tank
> circuit...
>
> - b
>
>
>
> >
> > Dear List
> > I understand the rate of change in current with time (dI/dt) in the
> > switching device in a TC is considerable. Is it still the case that only
> > The SCRs capable of handling such severe duty are those with
> > "interdigitated" gate construction e.g GTOs or has modern SCR technology
> > changed this. Would a modern modern hockey-puck SCR such as the one
> > described  here
> >
> http://www.ebay.co.uk/itm/Capsule-thyristor-N195CH12-390A-ITav-/320794404043?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item4ab0d624cbwith
> > ratings of 1200V and 390A be of running at least a small TC would the
> > turn-on still be too slow?
> >
> > Jolyon
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> >
> >
>
>
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