Re: [TCML] multiple miniature transformers

[Chris Rutherford <chrismrutherford@xxxxxxxxxxxxxx>]

I suppose I could use groups of transformers per filter i.e. 2*3 +
1*4, requiring only 3 terry filters.

On Wed, Nov 11, 2009 at 9:31 PM, Phil Tuck (hvtesla) <phil@xxxxxxxxxxx> wrote:
> Hello.
> You mention you would INDIVIDUALLY "protect each NST using something like a
> Terry filter" Would that not be rather expensive? 80 (approx') MOV's and 20
> Ohmite  resistors?
> I used to use a bank of just three and they were dam heavy and bulky. I only
> used the one Terry filter for the lot, but you could toast bread off the
> resistors though. If you do go ahead I'm sure you could use less Terry
> filters, or a single different type of filter better suited to that
> situation.
>
> Regards
> Phil
>
> www.hvtesla.com
>
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Chris Rutherford
> Sent: 11 November 2009 15:27
> To: Tesla Coil Mailing List
> Subject: [TCML] multiple miniature transformers
>
> Hi All,
>
> A couple of years back I made a TC powered by 4 parallel NSTs,
> providing 1KVA, which worked reasonably well.  I was thinking about
> extending the idea using 10 larger (identical) NSTs to provide 10KVA.
> I would individually protect each NST using something like a Terry
> filter, and also place a switch on the mains side of each transformer,
> so that I can switch each transformer on individually (perhaps using a
> relay).  In theory, this would allow me to ramp up the power in 1KVA
> steps to a total of 10KVA.  What problems can you foresee with this?
> Has this method of TC load control been tried before?  The advantage
> would be removal of the Variac and not having to lug a pole pig
> around.  Presumably the primary circuit can be modeled/ designed based
> on the parallel impedances of the transformers, at maximum input
> power.
>
> Thanks
>
> Chris
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla