On 10/13/2015 5:29 PM, David Vanhorn wrote:
> Similar problem in relays, the common diode across the coil slows down th=
e
> release which causes arcing problems.
> \We use zeners from the bottom of the coil to ground. The zener voltage i=
s
> a bit lower than the VCE of the transistor.
> Speeds up the release by about 50% on our relays.
>
> On Tue, Oct 13, 2015 at 3:20 PM, Bob Blick <bobblick@ftml.net> wrote:
>

Right.  What I'm trying to figure out though is how to calculate the=20
voltage and current of the spike when the energy is released (assuming=20
no protection diode).  From there, I can calculate the best-sized diode=20
to dissipate the power.

Cheers,
-Neil.

--=20
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