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RE: www.drsstc.com massive update!

Original poster: "Derek Woodroffe" <tesla@xxxxxxxxxxxxxxx>

>You really do want to use IGBT's for this application.
>MOSFETs cannot handle the very high peak currents (especially those IRF460
types) that are
>atypical of DRSSTCs.


    Yes I totally agree, this DRSSTC was really an experiment to play with
the issues with some cheap silicon, I have a number of 80A & 300A IGBT's on
standby for a real play, but the stakes are a bit higher with those ;-)

>   If I were you, I would put some ultra fast catch diodes across the fets.

>Something like MUR3060 or something. You don't want the MOSFET body diodes
to act as catch
> diodes, their turn off time is too slow.

	I have added a set of MU1560's across the (replaced) FETS.