[TCML] Sec design trade-offs and considerations

[Barton B. Anderson]

And there is a single turn roughly the size described.
Bart

Chris Swinson wrote:
> Finn,
>
> 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.
>
> Chris
>
>
>
> ----- 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
>
>
>> Chris,
>>
>> 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 ,
>>>
>>>
>>>>
>>>> Chris,
>>>>
>>>> It sounds to me that you're planning to use the SCR to replace the 
>>>> spark
>>>> gap.  The tank will ring down while the SCR is turned *on*.   The 
>>>> SCR will
>>>> extinguish when the energy rings down sufficiently.  If this is  
>>>> what you
>>>> 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 the
>>>> solid state
>>>> device is not switched at the RF frequency, but rather at the 
>>>> break-rate
>>>> frequency.
>>>>
>>>> John
>>>>
>>>
>>> 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 :-(
>>>
>>> Chris
>>>
>>>
>>>
>>>
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>>>
>>>
>>
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