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Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
I am currently collecting parts to eventually attempt to construct a DRSSTC.
I have been looking for a secondary form, but am unsure of what size to try. I'm guessing it will be governed by the durability of the bridge, and therefore, the IGBTs. I have purchased four FMG2G100US60 small brick IGBTs, which are rated 600V at 100A and 200A pulsed. I have never used brick-style IGBTs, and was actually unaware of the fact that there would be two transistors crammed in there, since it was not advertised as a dual IGBT or anything... but it was a pleasant surprise.
I have read up on a lot of DRSSTC theory and see that IGBTs can be ridiculously overdriven, but quite frankly, I would like my creation to last a while (under my faulty construction), so I'd don't want to push them too far outside their parameters.
How limited am I by the relatively low 600V rating? And by the 200A pulse rating? Is it worth making two separate H bridges to feed the same primary or is simply paralleling IGBTs feasible? Or is the rating enough for a small-ish project?
Also, how big of a coil can I expect to make with these ratings?
Registered Member #639
Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
I'd go for quite a large coil for your first DRSSTC. The larger the coil the lower Fres is and the easier it is for you to drive the huge gate C of these IGBT's.
A 100 cm long 20cm in diameter coil form would work quite well with just under 2K turns. This coil will be severely limited by your igbt's since they are only rated for 200A pulsed. . .
If you want a smaller coil you need faster IGBT's these are simpler to drive btw
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DRSSTC Questions
