Today's Message Index:
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1. 08:45 AM - Re: How does the Ducatti rectifier/regulator work? (user9253)
2. 03:16 PM - Re: How does the Ducatti rectifier/regulator work? (Robert L. Nuckolls, III)
3. 04:21 PM - Re: How does the Ducatti rectifier/regulator work? (C&K)
4. 04:34 PM - Power stabilizer wiring (Weaver, Erich)
5. 10:52 PM - Re: Power stabilizer wiring (Jeff Luckey)
Message 1
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| Subject: | Re: How does the Ducatti rectifier/regulator work? |
I assume that the SCRs conduct at low voltage and shut off when the voltage on
terminal "C" reaches the set-point. And heat is generated due to the forward
voltage drop across the SCRs.
The battery symbol in the Rotax regulator/rectifier schematic looks upside down.
According to this forum:
http://www.edaboard.com/thread67699.html
The "E" in resistor values stands for ohms. Thus I interpret 2E2 to be 2.2 ohms.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435958#435958
Message 2
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| Subject: | Re: How does the Ducatti rectifier/regulator work? |
At 18:43 2014-12-20, you wrote:
>
>Can we assume that 820E and 2E2 resistors in the schematic are 820
>ohm and 2R2 (2.2) ohm resistors?
>Ken
Yes . . .
Are you contemplating a DIY clone?
Bob . . .
Message 3
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| Subject: | Re: How does the Ducatti rectifier/regulator |
work?
On 21/12/2014 6:15 PM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 18:43 2014-12-20, you wrote:
>>
>> Can we assume that 820E and 2E2 resistors in the schematic are 820
>> ohm and 2R2 (2.2) ohm resistors?
>> Ken
>
> Yes . . .
>
> Are you contemplating a DIY clone?
>
Yes but not immediately.
I did a one off many years ago for the positive side of a wound field
alternator with a commercial IC that has worked out well. I'd like to
regulate the charging on some small equipment that is hard on batteries
and I also told myself that I'd roll my own if I ever need another John
Deere unit for the airplane. I like more temperature compensation than
commercial regulators incorporate (and my batteries seem to agree...)
Ken
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| Subject: | Power stabilizer wiring |
Rather than a standby battery I am installing a 4 amp rated 'Intelligent Power
Stabilizer' on my z-13/8 wired RV for brownout protection to one of my two EFIS
screens during startup. The EFIS draws 1 amp. The manual says to install a
12 amp fuse on the power inlet to the IPS unit and a second 5 amp inline fuse
on the wire providing power from the IPS to the secondary power inlet on the
EFIS. First question: the 12 amp fuse can just be on my main bus so no hassle
there but i would rather not have the 5 amp inline fuse buried behind the subpanel
with the IPS if its not absolutely necessary. Do I definitely need both
fuses for adequate protection?
Second question: Any reason the IPS can't be used as the sole source of power
to the EFIS rather than as backup? If I wired the IPS to the ebus I have the
backup alternator I can use should the primary fail. Maybe the IPS is not intended
for full time operation or perhaps it draws more current than practical
for the ebus?
Thanks
Erich
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Message 5
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| Subject: | Re: Power stabilizer wiring |
Eric wrote:
Second question: Any reason the IPS can't be used as the sole source of power
to the EFIS rather than as backup? ...
If the IPS is the sole source of power & it fails
then it takes-out your efis. Any component you
add to the critical path decreases reliability.
If you wire it as you described, then it helps
w/ brownout and if it fails it's no big deal.
-Jeff
On Sunday, December 21, 2014 4:42 PM, "Weaver, Erich" <erich.weaver@urs.com> wrote:
Rather than a standby battery I am installing a 4 amp rated 'Intelligent Power
Stabilizer' on my z-13/8 wired RV for brownout protection to one of my two EFIS
screens during startup. The EFIS draws 1 amp. The manual says to install a
12 amp fuse on the power inlet to the IPS unit and a second 5 amp inline fuse
on the wire providing power from the IPS to the secondary power inlet on the
EFIS. First question: the 12 amp fuse can just be on my main bus so no hassle
there but i would rather not have the 5 amp inline fuse buried behind the subpanel
with the IPS if its not absolutely necessary. Do I definitely need both
fuses for adequate protection?
Second question: Any reason the IPS can't be used as the sole source of power
to the EFIS rather than as backup? If I wired the IPS to the ebus I have the
backup alternator I can use should the primary fail. Maybe the IPS is not intended
for full time operation or perhaps it draws more current than practical
for the ebus?
Thanks
Erich
This e-mail and any attachments contain URS Corporation confidential information
that may be proprietary or privileged. If you receive this message in error
or are not the intended recipient, you should not retain, distribute, disclose
or use any of this information and you should destroy the e-mail and any attachments
or copies.
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