Re: IGBT SSTC finally possible?

["Tesla list" <tesla-at-pupman-dot-com>]

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
 >  > >
 >  >
 >
 >
 >
 >
 >