RE: ISSTC Components

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

Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com> 

Thanks for the input, I appreciate it, BUT I asked if "anyone used the
CM300DY-24H IGBT bricks in a ISSTC?". I might append that question with
this: Are the rise and fall times of this brick (500 and 350 ns,
respectfully) to slow to use in a "standard" (Steve Ward design) ISSTC?
I also have interests in high power Staccato (1-30 PPS) type coils.
Currently I am doing just that, but only getting 25-26" Staccato sparks,
but depending on pulse width, I believe peak current is getting pretty
high. These are those wicked VTTC type sparks.

Regards,

David Trimmell

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, June 18, 2004 4:35 PM
To: tesla-at-pupman-dot-com
Subject: Re: ISSTC Components

Original poster: "Eastern Voltage Research Corporation"
<dhmccauley-at-easternvoltageresearch-dot-com>

I'll third this.  All of my IGBTs i've blown have been killed most
likely
due to voltage transients within the full bridge - not high current.

Dan

  > I must second this.  Small IGBTs are more powerful than you may want
to
  > believe.  The IGBTs you are using at the moment, David, can probably
do
90"
  > or so in a full bridge... actually maybe more.  You just need larger
coils
  > and push the IGBTs with 30V on the gates.  They should be able to
take
some
  > 2000A i believe... even my ISSTC doing 60" only pushes 800A at MOST.
So
  > there really is no reason to use the big ones since you can get the
smaller
  > ones for cheaper anyway.
  >
  > Steve