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Repost from Kurt Re: sebpt coil (--> Seibt- and Induction-coils)
Original poster: "Kurt Schraner" <k.schraner@xxxxxxxxxxx>
Hi Kurt sent this too:
He may be having mail or server problems so I will see if I can help
him work that out...
Cheers,
Terry
============
Hi all interested,
didn't read the TCML mails for some days (outch..., some 300's!);
that's why there was no response from my side. I might be able to
send more info about the topic, and also induction-coils. Better
off-list, to everyone interested, because my webspace is exhausted by
the old stuff, and I would need to send pictures (this also prevents
me from making available the more recent HV activities, like the
Seibt, a 600kV Marx, newer induction coils and interruptors).
_Seibt_
Bart:
Thanks for jumping in the gap (pun not intended ;-)), in view of my
absence, and giving useful links. A few links of an "ancient" Seibt
at university of Bern and of my own coil are here:
http://home.datacomm.ch/k.schraner/SeibtSpule1k.JPG at Uni-Bern 14k
http://home.datacomm.ch/k.schraner/SeibtSpuleFuss_k.JPG at Uni-Bern 32k
http://home.datacomm.ch/k.schraner/SeibtSpuleKopf_k.JPG at Uni-Bern 15k
http://home.datacomm.ch/k.schraner/Dscn1740k.jpg Andi's & Kurt's
2 Seibt's 46k
http://home.datacomm.ch/k.schraner/Dscn1768k.jpg primary 44k
http://home.datacomm.ch/k.schraner/SeibtTop1766k.jpg top of the coil 31k
http://home.datacomm.ch/k.schraner/Dscn1760c.jpg setup in lab. 82k
http://home.datacomm.ch/k.schraner/Seibt_0005e.JPG in operation 33k
http://www.classictesla.com/seibt/Seibt_0005c.JPG dito but
better: the pic at Bart
Looking at the top end of the coil (-also with springs-), you may
notice, the upper coil-end to be connected to the corona-wire frame,
forcing by that way a current maximum (=voltage node) to the top: the
corona zones are just a bit moving down, when operating accordingly.
Bart, I think, it might be useful to try a NST primary HV supply, in
order to avoid winding your own induction coil (for first ;-)).
However I've not verified it yet. I'm currently using the Seibt with
2 pairs of seriesed 2nF/40kV doorknob caps, instead of the 2
leyden-jars. The somehow disturbing corona of the jars is then absent
(in order to see the subtle corona effects, a really dark room is
needed: I had to install black curtains to the windows).
_Induction-coils_
Ed, Bart, Tim:
The smaller induction coils, we (=Andi & me) are using for the
Seibt's, are fully "handwoven" homemades. The experience we gained
when making the bigger coils was useful, e.g. regarding insulation.
We have buildt 2 coils with 2 different secondaries (25'600 resp.
48'000 turns, pancake-wound), and 4 primaries. The coils can be
exchanged, as well as the cores.
http://home.datacomm.ch/k.schraner/inductor2004/12cmSpark1703.jpg
was "happy 2005"
http://home.datacomm.ch/k.schraner/inductor2004/2inductors1704.jpg
with a few data
http://home.datacomm.ch/k.schraner/inductor2004/2Prims1650.jpg primaries
http://home.datacomm.ch/k.schraner/inductor2004/2Secs1667.jpg secondaries
The making of these coils was documented in about 100 photos.
By good luck I got this nice one (_not_ homemade!):
http://home.datacomm.ch/k.schraner/DSCN1723.JPG big inductor 25cm
spark here, (Utz AG, Bern,~1950)
Ed, my version of your induction coil driver looks about like this:
http://home.datacomm.ch/k.schraner/Cap_discharger_EdP8.jpg Ed's
driver, slightly modified
http://home.datacomm.ch/k.schraner/DSCN1724.JPG dito., realized.
Currently I'm documenting / simulating an advanced IGBT induction
coil driver of the interruptor type (energy initially loaded to the
primary inductance, in traditional style), which was developed by
Andi Saile (...the "Andiruptor"). It allows very precise control of
the discharges in different modes, similarly to "Wehnelt",
"Mercury-Interruptor",..."Wagner Hammer". I've also developed a
extenensive design excel, based on Codd's book "Induction Coil
Design"(1922) and some other old texts, in order to design and
evaluate our coils. It needs however comments to be added, to make
public release feasible, - perhaps.
Best regards,
Kurt