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Re: Triac as gap replacement
Original poster: "Richard W. by way of Terry Fritz <teslalist@qwest.net>" <potluck@xmission.com>
Hi Ken,
I've done a lot of cramming about triacs and SCRs lately. So much so that a
lot has seemed to run together. Anyway, as far as current capability the
back-to-back SCR is the way to go as far as I understand. There's something
about current lag in inductive circuits that won't allow a triac to turn off
or something like that. I would assume a capacitive load would be just as
bad. The word "commutate" comes to mind somewhere. With back-to-back SCRs
each SCR will always turn off every other cycle due to it's inherent
properties.
Maybe someone else here can clarify that for you.
Rick W.
Salt Lake City
----- Original Message -----
From: Tesla list <tesla@pupman.com>
To: <tesla@pupman.com>
Sent: Wednesday, June 18, 2003 8:12 PM
Subject: Triac as gap replacement
> Original poster: "K. C. Herrick by way of Terry Fritz
<teslalist@qwest.net>" <kchdlh@juno.com>
>
> Have any of you looked into triacs having something like these
> capabilities?
>
> Voltage withstanding, 600 V
>
> Current capability, sine-ac bursts of 3 KA peak declining over 10 cycles
> to 10% in 100 us, and repeated @ 120 bps. In the circuit I'm
> contemplating, that seems to be about 20 A rms (which is the
> charging-current into the primary capacitors; I figure, rms current in =
> rms current out).
>
> If so, can you save me some looking?
>
> Ken Herrick
>
>
>