[TCML] Sec design trade-offs and considerations
list at future-technologies.co.uk
Sun Nov 25 08:50:02 MST 2007
There are 2 circuits with in effect 2 tanks caps, one does the work 1,000uF
which is discharged into 10nF 1uH primary, about 2mhz. the 1,000uf just
supplys the current, really there are 2 tank circuits in operation.
----- Original Message -----
From: "Finn Hammer" <f-h at c.dk>
To: "Tesla Coil Mailing List" <tesla at pupman.com>
Sent: Sunday, November 25, 2007 7:39 AM
Subject: Re: [TCML] Sec design trade-offs and considerations
> To resonate a 1uF cap at 2MHz, you need a 6.3E-9H primary inductor. That`s
> awfully small.
> (about one inch diameter, single turn)
> Surge current @ say, 1000V will be 12+kA
> Di/Dt will be 100kA/uS
> Do you have a SCR that doesn`t latch at these conditions?
> Cheers, Finn Hammer
> Chris Swinson skrev:
>> John ,
>>> It sounds to me that you're planning to use the SCR to replace the
>>> gap. The tank will ring down while the SCR is turned *on*. The SCR
>>> extinguish when the energy rings down sufficiently. If this is what
>>> plan, it's not a new idea. I've used SCR's in this way in Tesla coils,
>>> Lou B. has done it, Malcolm W. has done that and probably others too.
>>> Terry's SISG coils use the same concept except he used an IGBT which
>>> is kept on during the transfer time. The overall concept being that
>>> solid state
>>> device is not switched at the RF frequency, but rather at the
>> True the SCR idea is not a new idea. You are correct in what you say.
>> Though whay should be a new idea is to use 2mhz high Q system and a
>> 1,000uF tank cap all at low voltage... If this has already been done
>> before then I would like to review the specs and data, would save me
>> weeks of time in development! I started this project about 8 months ago
>> now :-(
>> Tesla mailing list
>> Tesla at www.pupman.com
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