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Re: [TCML] mini Tesla coil specs
Hi Paul -
Since you had also mentioned driving a coil with a SISG switch, I wasn't
sure if "SRC" might be a new type of power switching circuit that you might
have discovered somewhere. I suspected that you might have meant SCR, but I
thought it would be better to ask for clarification.
In some industrial power-control systems, strings of series-connected SCRs
are used to obtain the high standoff voltage ratings required. Large arrays
of series-connected high-voltage, high-current SCRs have shown up on eBay
that have power ratings of hundreds of KW. However, I think these are
primarily used in pulse-width-modulation power control of resistive loads.
SCRs typically have rather slow turn-on and turn-off characteristics,
compared to IGBTs or MOSFETs, so they are not optimum for any application
that requires high-frequency switching.
Over the years, there has been a fair amount of discussion on the TCML
concerning the use of SCRs as switches in Tesla coil primary circuits
(search the TCML archives at www.pupman.com). However, I don't recall anyone
ever actually building a SCR-commutated Tesla coil. (If anyone is aware of a
Tesla coil that successfully used SCRs as a primary switch, please speak
up!)
SCRs are used very successfully to drive high-voltage generators based on
iron-core automotive ignition coils, but this is quite different than a
resonant Tesla coil.
Regards,
Herr Zapp
----- Original Message -----
From: "Paul Brodie" <pbbrodie@xxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Thursday, November 05, 2009 9:40 PM
Subject: Re: [TCML] mini Tesla coil specs
Sorry, Herr Zap.
Simply a typographical error. I am legally blind and I normally write with
18 type size. It is very difficult for me to see what is on the screen
when I write with small type like this. I have set it to do it
automatically when I write with HTML. Please excuse the error. By the way,
even though I am using plain text, is there any reason I can't use a
larger type size when writing to the TCML? I suppose I should be asking
Chip but in a way, I am. ;-)
Thanks for pointing out the error. That made my question rather confusing,
I suppose.
Paul
Think Positive
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