Re: IGBT SSTC finally possible?

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

Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net> 

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
 > >
 >