Re: Voltage Regulator advice

[farna@xxxxxxx]

But would an old bi-metal regulator even work? Just out of curiosity...


On May 19, 2005 Tom Jennings wrote:

> On Thu, 19 May 2005 farna@xxxxxxx wrote:
> 
> > Heck, I wonder if you could feed the alternator outputs into an
> > old fashioned generator regulator? Probably wouldn't handle
> > anyting over 35A though...
> 
> 
>    >>>SHUDDERS AT THE THOUGHT<<< Those old things are horrible.
> They make me laugh -- buzzing, burning contacts, bending spring
> arms to set voltage, it's so 19th century! They did work though,
> far better than it seems they ought to!
> 
> Nearly all all alternator voltage regulators (for the usual
> rotating field alts) are pretty much the same; they cary mostly in
> connectors and only slightly in set voltage. They're internally
> pretty simple, a transistor, a zener, a thermistor for temperature
> compensation and some other crap, all alternators want basically
> the same thing (voltage too low? increase field current. Etc).
> 
> Bigger alts need more field current, but not much else changes.  A
> reg from a 55A alt should be simply a bit heavier-duty than one
> from a 21A. (It might get hot vice-versa.)
> 
> They all have:
> 
> * battery connection (measure battery voltage)
> * field connection (drives the field)
> * ground (often alternator body)
> * idiot light
> * stator connection (measures alt output before final diode)
> 
> If you can find the pinouts for the regulator, you can get it to
> work, if it's any modern-ish alternator 20a - 150a. There might be
> exceptions, but probably not very many.
> 
> 
> 
> 
> 
> .


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