dlj04(at)josephson.com
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 Posted: Thu Jan 01, 2015 12:39 pm Post subject: AeroElectric-List Digest: 3 Msgs - 12/31/14 |
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On 12/31/14 11:59 PM, AeroElectric-List Digest Server wrote:
| Quote: | Time: 07:41:25 AM PST US
Subject: Re: How does the Ducatti rectifier/regulator work?
From: "Eric M. Jones" <emjones(at)charter.net>
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?
It looks like an alternator regulator because that's what it is. The
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output from the stator coils is single phase AC.
There are many attempts online at drawing out the schematic of the
existing unit (it helps to search with the correct spelling of Ducati)
but I think the most complete one is in Gilles Thesee's
http://contrails.free.fr/elec_ducati_en.php. There is another website in
Belgium that has some of Gilles' earlier work, with some SPICE
simulations of the waveforms at
http://www.aero-hesbaye.be/circuit_elec.htm. Google Translate does a
good enough job if you don't have any French.
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