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Re: IGBT SSTC finally possible?
Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net>
Yes but Steves *INTERUPTED* Solid State Tesla Coil is not continuous, it is
different as it is interupted rather then running off half wave DC or full
wave DC, those have a smooth sine wave, instead of the quick on and off
pulses that the interuptor does in the ISSTC.
Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, April 24, 2004 12:52 PM
Subject: Re: IGBT SSTC finally possible?
> Original poster: "Eastern Voltage Research Corporation"
<dhmccauley-at-easternvoltageresearch-dot-com>
>
> Just to clarify, the normal SSTC is NOT a CW mode SSTC.
>
> The PlasmaSonic (audio modulated) is a CW type SSTC. CW requires pure DC
on
> the rails and output discharge is
> very quiet, brushlike, and very short (usually 2-3 inches)
>
> Most of the "normal" or "atypical" SSTCs use a full-bridge with some type
of
> non-DC waveform such as half-rectified AC, full-rectified AC, etc...
>
> A CW SSTC or CW VTTC would be like Sue Gaeta's audio modulated SSTC or my
> Plasmasonic audio modulated system.
>
> Dan
>
> > Folks the ISSTC is a TOTALLY different beast, as well as the DRSSTC
from
> the
> > normal CW SSTC.
> >
> > The IGBTs are not the reason why the ISSTC works, or why the DRSSTC
works.
> > If you go back and look you'll see that Steve was using MOSFETs before
he
> > added the tuned primary.
> >
> > If you read a bit on IGBTs, some will say that they incorporate the
best
> of
> > MOSFETs with the best of Bipolar Transistors, as they have a low
> dissapation
> > compared with MOSFETs which dissapate more power.
> >
> > Back "in the day" I believe IGBTs were used mostly in industrial motor
> > controllers which were running at low frequencies, until now when they
> > started to be used in SMPS and other higher frequency applications.
> >
> > Though they aree good, they start to taper off as the frequency goes
up.
> >
> >
> > Regards - Jim Mitchell
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Friday, April 23, 2004 11:03 PM
> > Subject: RE: IGBT SSTC finally possible?
> >
> >
> > > Original poster: "John Tomacic" <tesla_ownz_u-at-hotmail-dot-com>
> > >
> > > Good advancements have been made recently using IGBTs, with results
> > > approaching SG coils, in particular by Steve Ward. You can foillow
the
> > > thread on www.4hv-dot-org in the hv forum, ISSTC thread. Here's a direct
> link:
> > >
> > > http://www.4hv-dot-org/index.php?board=5;action=display;threadid=23039
> > >
> > >
> > >
> > >
> > > >From: "Tesla list" <tesla-at-pupman-dot-com>
> > > >To: tesla-at-pupman-dot-com
> > > >Subject: IGBT SSTC finally possible?
> > > >Date: Fri, 23 Apr 2004 08:22:04 -0600
> > > >
> > > >Original poster: Mr Gregory Peters <s371034-at-student.uq.edu.au>
> > > >
> > > >Hello all,
> > > >
> > > >Forgive me if this topic has already been discussed, but I haven't
> read
> > > >any posts from the list for over a year.
> > > >
> > > >Just been looking at the international rectifier homepage, and in
> > > >particular the IRG4PF50WD, a new "warp" speed IGBT that can be
used
> in
> > > >hard switching applications up to 100kHz.
> > > >
> > > >http://www.irf-dot-com/product-info/datasheets/data/irg4pf50w.pdf
> > > >
> > > >Was thinking it would be nice to make a multi kW, ~600v input, SSTC
> with
> > > >some of these. Any reason why this isn't possible (turn-off time
still
> > too
> > > >long?) I was thinking it would be interesting to use some of these
to
> > > >drive my 12" secondary which resonates well below 100kHz.
> > > >
> > > >What changes would need to be made to a regular mosfet SSTC
circuit?
> > > >
> > > >Cheers,
> > > >
> > > >Greg Peters
> > > >Department of Earth Sciences,
> > > >University of Queensland, Australia
> > > >Phone: 0402 841 677
> > > >http://www.geocities-dot-com/gregjpeters
> > > >
> > >
> >
> >
> >
> >
> >
>