Re: PIRANHA-III Power control? (fwd)

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Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 20 Dec 2006 17:03:42 -0700
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: PIRANHA-III Power control? (fwd)



Brian is running all the data thru P-Spice and some other high-end program 
he has.  I will be able to post these when he finishes his work in the next 
few weeks.  We are looking at complete sine wave control 5% thru 95%. 
That's our goal --- with very little if any interference.

Dr. Resonance


>
> I have had discussions most of the day today with ON Semiconductor, Teccor
> Electronics, and STI Semiconductor.  Their application engineers were very
> helpful and sent me several informative diagrams.  Brian and I are 
> digesting
> their content and will propose a complete circuit in the next few days.
>
> I think we have the problem solved using optoisolated 555 timers driving
> back to back SCRs.  Teccor especially has one that is rated for 65 Amps,
> isolated mtg, and with back to back will handle up to 91 Amps Irms.  All 
> for
> only $5.60 from Digi-Key!!  p/n is S6065J.
>
> I will be doing experiments with our iron core current peak clipping 
> chokes
> using this setup.  We hope to have a complete solution by Jan 15th for the
> variac elimination problem.
>
> According to the engineers I have worked with this solution should also
> enable us to use very cheap control even with pole pigs!!  In a box 
> weighing
> under 10 lbs.
>
> The engineers also had very good snubber suggestions that I will 
> incorporate
> into my drawings.
>
> Dr. Resonance"
>
> What kind of line current waveforms do you anticipate and does
> that box weight include enough RF filtering to keep switching garbage off
> the line?
>
> Ed
>
>
>
>
>