Home » Public Forums » GMCnet » Isolater vs Alternator (My experience)
| Re: [GMCnet] Isolater vs Alternator [message #326628 is a reply to message #326626] |
Sat, 02 December 2017 04:10   |
johnd01
Messages: 354
Registered: July 2017
Location: Sacrameot
Karma:
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Senior Member |
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Sounds like the isolator to the chassis battery opened which increased the
alt. output and cooked the house batteries. If the house battery load had
been the problem the other side of the isolator would have opened and the
house battery would have been saved.
Looks like you we should oversize the isolator. We should be able to build
our own isolators from diodes.
Correct me if I am wrong but I think we could use half of a full wave
bridge like:
https://www.amazon.com/Baomain-Bridge-Rectifier-MDQ-100A-Module/dp/B01JIKSHCA/ref=pd_sim_328_3?_encoding=UTF8&psc=1&refRID=AS5H1C1VNSSMRHE2WHZ Z
or
https://www.amazon.com/Baomain-Bridge-Rectifier-MDQ-200A-Module/dp/B01JILFZCO/ref=pd_bxgy_328_2?_encoding=UTF8&psc=1&refRID=7VY1G9T5A8A558NREZ JJ
On Fri, Dec 1, 2017 at 9:12 PM, Ken Burton wrote:
> Your problem was the unplugged alternator. By unplugging it, the
> alternator lost it's reference voltage and went to maximum which was 18.5
> volts or
> more depending on the regulator version built in the alternator. You are
> lucky if all you lost was the isolator. The same thing would have happened
> if you had a combiner installed. The excess voltage and associated current
> caused by the disconnected alternator sense line had to go somewhere.
> Usually it is the battery(s) that most of absorb it until they boil dry.
> Then the voltage goes even higher.
>
> I had that happen on an airplane that I was flying one time. It boiled
> the battery dry and then took out the radios and several position lights. I
> ended up shutting down the alternator in flight and flying home a couple
> hundred miles in the dark without anything electric working. Aircraft
> engines do not use any alternator / battery electric to run. They have
> dual magneto ignition systems.
>
>
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
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--
*John Phillips*
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Johnd01
John Phillips
Avion A2600 TZE064V101164
Rancho Cordova, CA (Sacramento)
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