Re: ISSTC Components

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

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

Again,  This is not an OLTC, or simmilar which directly replace the gap with
an IGBT.  This is quite different, as it uses a bridge of transistors which
drives at the resonant frequency of the secondary coil.  In addition to
that, the series tuned tank and primary combination.  If you had done this 8
years ago,  why has it been more widely known?   I don't think you're
understanding how this set up is,  it is not directly replacing the gap with
a semiconductor, that is quite different from what is being done in the
ISSTC/DRSSTC systems.

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, June 15, 2004 2:44 PM
Subject: Re: ISSTC Components


 > Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
 >
 > On 14 Jun 2004, at 9:26, Tesla list wrote:
 >
 >  > Original poster: "Dan" <pbursa-at-cfl.rr-dot-com>
 >  >
 >  > I think the real break trough is that Jimmy and Steve started using
 >  > resonating primary ... That's what makes DRSSTC and ISSTC different
 >  > from SSTC running in the interrupted mode. Vladan
 >
 > You must have missed a previous post from me on the subject. I did
 > exactly that 8 years ago. Although the setup was done for purely
 > experimental reasons and was small, the idea of using SS devices as a
 > gap substitute in an otherwise standard coil is not new. What is new
 > is a class of switching device not available back then. I even
 > contemplated using Westcode thyristors and flywheel diodes rated in
 > the kA range but on running the figures, found that the di/dt rating
 > of the thyristors would only permit a full powered coil to fly at
 > around 10kHz. Again, all this is history and on record in the list
 > archives.
 >
 > Malcolm
 >
 >
 >  > ----- Original Message -----
 >  > From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Sent: Monday, June 14, 2004 1:19 AM
 >  > Subject: Re: ISSTC Components
 >  >
 >  >
 >  >  > Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
 >  >  >
 >  >  > On 13 Jun 2004, at 12:00, Tesla list wrote:
 >  >  >
 >  >  > <snip>
 >  >  >  > I do appreciate what you are doing, but i cant help from voicing
 >  >  my >  > opinion about this.  It would be different if you had bought
 >  >  these >  > parts at discount and resold them, but you are selling
 >  >  samples.  As >  > the "inventor" of the ISSTC, i guess this makes me
 >  >  feel a bit more >  > emotional about this related issue. >  > >  >
 >  >  Regards, >  > >  > Steve Ward > > That's a pretty bold claim
 >  >  considering that Mark Barton ran his > MOSFET coil in both CW and
 >  >  interrupted mode years ago. I once thought > that a Marx bank I
 >  >  developed was an innovation since I used chokes > instead of
 >  >  resistors as the charging elements. Then a kind person in > the
 >  >  States gave me a copy of Sargent and Dollinger's "High Power >
 >  >  Electronics" and I saw "my" wonderfully innovative scheme described >
 >  >  in graphic detail and written up long before I hit upon the idea. >
 >  >  That's not to belittle your achievement in any way but just to make >
 >  >  known that an exhaustive search for prior art is not a bad thing >
 >  >  before making claims of originality. > > Malcolm > >
 >  >
 >  >
 >  >
 >
 >
 >