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Long Pulse IGBT GDT design

To: tesla-at-pupman-dot-com
Subject: Long Pulse IGBT GDT design
From: "Tesla list" <tesla-at-pupman-dot-com>
Date: Sat, 09 Oct 2004 11:39:06 -0600
Resent-Date: Sat, 9 Oct 2004 11:41:11 -0600
Resent-From: tesla-at-pupman-dot-com
Resent-Message-ID: <LEGxeC.A.mTH.wKCaBB-at-poodle>
Resent-Sender: tesla-request-at-pupman-dot-com

Original poster: sparktron01-at-comcast-dot-net 

All

Need some design guidance for a GDT for an IGBT power switch.  Need to turn
on for ~300usecs, off time of 1.5millisecs (PRF = 400Hz).  If drive voltage 
is 30Vpk to pk, results in a V*t product of 9000V-usecs (typical GDT 
product is in
200-500V-usecs).

Transformer may saturate, but will DC restore during off time so not 
particularly
a big deal.  Any design guidance out there for DC restoration using 
standard toroids for long pulse IGBT gate drive?

Thanks!

Best Regards
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA. USA

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