Re: Can I use SCR as a diode? (in a RCD snubber, IGBT bridge)

"John Popelish" <jpopelish@xxxxxxxx> wrote in message
news:UMmdnWZQkIwEtRrenZ2dnUVZ_sudnZ2d@xxxxxxxxxxxxxxx
> > I got it. Thanks John. Also, an SCR is not a "fast recovery" diode, is
> >it?
>
> I don't have any specific numbers, but, I doubt it, since there is
> more internal structure that might hold change carriers.
^ ^ ^
Freudian slip? ;-)

I don't think SCRs turn off much faster than 10us, even highspeed inverter
grade devices. I suppose that's about the same as "reverse recovery time"
in a rectifier. Easy enough to measure, if you have a several-amps
squarewave handy (heh, which you will in a few weeks or whatever!).

Ya know, SCRs might not be that bad an idea for your project Iggy, since
such an inverter is a shorting-commutation type setup...just wire it for DC
coupling, and hell you can use convienient pulse transformers for drive!
Rugged as hell, and it stays latched in whatever polarity you left it,
making drive circuits easy.

Tim

--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms


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