nuckolls.bob(at)aeroelect
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 Posted: Fri Jan 02, 2015 9:28 am Post subject: Subject: Re: How does the Ducatti rectifier/regulator work |
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Subject: Re: How does the Ducatti rectifier/regulator work?
From: "Eric M. Jones" <emjones(at)charter.net>
To: aeroelectric-list(at)matronics.com
I hesitate to inject my questions about the schematic of the Ducati
dynamo regulator. But what is that little unlabeled zener diode
feeding the base of the BF493S?
And why does this look like an alternator regulator instead of a DC
dynamo regulator? What am I missing?
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
It has a lot in common with a wound-field regulator.
See attached for an exemplar wound field regulator
from 'back in the day' . . .
The zener in the Ducati schematic is the regulation
voltage reference serving the same purpose as D12
in the attached schematic. Noodle through the same
rise-fall/on-off effects in the Ducati schematic
and you will see that perturbations in bus voltage
as sensed by the Ducati regulator causes a
programmed triggering of the SCRs in the gated,
bridge rectifier with the effect of throttling
Dynamo energy about the regulator's set-point
voltage.
Bob . . .
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