THOR PROJECT STATUS

• To: tesla-at-pupman-dot-com
• Subject: THOR PROJECT STATUS
• From: "Marco Denicolai" <Marco.Denicolai-at-tellabs.fi> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Wed, 22 Dec 1999 11:32:39 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hello everybody!

>From the dungeons of the Thor project, I came to the surface to tell you
briefly
about what I'm doing.

I have put together in a 19" rack a down-scaled version of my switched power
supply (that is, one half of the final version). That is capable of generating
up to 10 kV DC (from 0 to 10kV) at a current of 1A max. All electronics is
mounted on PCBs, the HV transformers too (!). The unit has been working
fine for
a month now: the voltage stability is about +/- 150V.

The problem is that yesterday I connected it to my old TC (removed to old MOT
supply): after a few bangs the IGBT driver chip died. Changed the chip, a few
bangs and again: rest in peace.

The transients from the spark gap gets induced back into the switcher primary
side, with a devastating effect: I know I should have tought about that, but I
was so much concentrated about getting the switcher to work that I haven't had
time to think about protection.

What I am going to do now is to try converting my schematics from Postscript
into PDF and make them publicly available on my web side, with part list and
explanations.

This way I hope to involve also some of you guys in helping me designing a good
protection strategy for the power supply.

I'll be back soon, but for now Merry Christmas to you all!

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