Today's Message Index:
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1. 05:13 AM - Re: Re: Alternator and regulator connections (C&K)
2. 06:54 AM - Re: Alternator and regulator connections (user9253)
3. 07:06 AM - Re: Alternator and regulator connections (user9253)
4. 01:24 PM - Re: Re: Alternator and regulator connections (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: Alternator and regulator connections |
If the regulator is an unknown automobile unit, isn't it more likely
that one field terminal should go to positive rather than ground as per
most cars since the 70's.
Before permanently wiring anything, I would be inclined to test whether
the regulator F terminal goes to ground or positive when system voltage
is low.
Similar for the Light terminal as it may need the warning light bulb to
positive voltage rather than ground.
Ken
On 29/12/2015 3:24 PM, Robert L. Nuckolls, III wrote:
> At 10:02 AM 12/29/2015, you wrote:
>>
>> Here are some educated guesses:
>> Reg Sense: Connect to main power bus through a fuse. Do not connect
>> to IGN terminal.
>> Warn Lite: Use the trial and error method. The lamp will limit the
>> current so hopefully no harm will be done if polarity is wrong. I
>> suggest first connecting the lamp to the main power bus through a
>> fuse. It should light up when the engine is not running. If not,
>> then try connecting the lamp to ground.
>
> Joe has it nailed . . .
>
> With respect to TWO field terminals on
> alternator. Ground ONE and run the other to
> the F terminal on regulator. These terminals
> are not polarity sensitive.
>
>
> Bob . . .
>
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| Subject: | Re: Alternator and regulator connections |
This particular alternator has two field connections. One field terminal does
go to positive (from the regulator). And the other one goes to negative. Polarity
does not matter because an alternator produces AC voltage. So even if the
polarity of the field wires is reversed, the alternator will still produce
AC voltage. Six diodes rectify the 3 phase AC from the stator windings into DC.
Unlike this alternator, most modern automotive alternators have the voltage regulator
located inside of the alternator case. Some of these automotive alternators
might have a terminal marked "F". But that terminal does not connect to
an external voltage regulator because there is already one inside of the alternator
case.
https://alternatorparts.com/understanding-alternators.html
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=451496#451496
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| Subject: | Re: Alternator and regulator connections |
Below is a link to a Youtube animated movie that explains how alternators work.
http://tinyurl.com/Alternator-Explained
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=451498#451498
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| Subject: | Re: Alternator and regulator connections |
At 09:04 AM 12/30/2015, you wrote:
>
>Below is a link to a Youtube animated movie that explains how
>alternators work.
>http://tinyurl.com/Alternator-Explained
This video is a little mis-leading. The final
evolutionary step in alternator development
shows a dc generator driving a commutator wtih
power pickoff brushes driving the alternator's
slip rings.
I don't think anyone would build one this way
because the whole idea behind the itty-bitty
generator sharing a shaft with the alternator
is to arrive at a totally BRUSHLESS design.
A tiny alternator with a rotating power winding
excited by a STATIONARY field would excite a small
3-phase rectifier on the rotating assembly and
wired such that DC power output excites the
ROTATING field of the main alternator. ALL
brushless designs will exploit this configuration
for wild frequency AC alternators, constant
speed alternators or beefy versions of the
legacy vehicular alternator/rectifiers
machines but with no slip-rings.
Bob . . .
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