europa-builder@ntlworld.com wrote:
>
> > This is how the Rotax regulator works! i.e. SCRs that dump the "unused
> current".
>
> That'll be why they need such a huge capacitor. Why on earth do they do it
> like that? Is there any good reason for it (other than cheap to make)?
>
> Cheers,
> Mark.
I have read that the little reg's for the 2-strokes use SCR's, maybe
even in a shunt circuit that's causing alarm here. However, for the
912/914, dissipating some derated figure more than 250 watts across an
SCR isn't the only regulator design option, if such an SCR were cheap
and would physically fit inside the heat sink.
Are these regulators failing in service? Do they get really hot "no
load?"
Best,
Fred F.
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