klehman(at)albedo.net
Guest
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 Posted: Mon Jan 01, 2007 8:23 pm Post subject: What Are The Odds?-regulator voltage |
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Actually most of the automobiles that I've played with for the last 20
or so years with solid state regulators do have at least some
temperature compensation. Many manuals will give a table of voltage
ranges to be expected depending on ambient air temperature and several
of the Chryslers such as the 97 Neon have battery temp probes (I think
it is a thermistor) in the battery enclosure. Mid 80's K cars had a
sensor in the intake airstream for the engine that would vary the
voltage somewhat. I've seen regulator circuits showing a couple of
diodes as the sensing element in the regulator but don't recall the
application. Many of these vehicles will output a so called "battery"
temp to a diagnostic device. Anyway the voltage does typically vary by
about 2/3 of a volt summer to winter here on my vehicles.
Seems to me that even the internal regulated alternators often list a
small variation depending on temperature.
Ken
Robert L. Nuckolls, III wrote:
| Quote: |
<nuckollsr(at)cox.net>
At 03:08 PM 12/31/2006 -0800, you wrote:
>
> <s_kilishek(at)yahoo.com>
>
> Bob:
>
> Thanks for your help.
>
> You're right. The field supply breaker isn't
> tripping, so the OVM-14 apparently isn't getting
> involved.
>
> I ran the two tests you suggested: (OAT was 46
> degrees, if that means anything).
Not much. I'm not aware of any regulator that
makes an effort to temperature compensate set-point
for battery temperature other than those provided
with remote temperature sensors like the B&C product.
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