Text 15602, 37 rader
Skriven 2005-11-08 20:21:59 av Björn Forsström (2:203/614.61)
  Kommentar till text 15537 av Michiel van der Vlist (2:280/5555)
Ärende: Fog lights
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 MvdV> Hello Raymond,

 >> I think there's a combination of two thngs then. AFAICT the jeep is wired
 >> so it draws fromthe battery and then the alternator circuit replaces what
 >> it draws.

 MvdV> That makes no sense to an electrical engineer. ;-)

But it does to a car-electrician.

 MvdV> No, there is no way to wire a car like that as the battery has only one
 MvdV> set of terminals. Current can flow in or out of it, but not both at the
 MvdV> same time.

The battery is paralell connected and deliver power when it's supposed
to and is being charged when there's an excess of power from the alternator.
Look upon it as a capacitor.

 MvdV> The generator, the battery and whatever draws current form the circuit
 MvdV> are basically all connected to the same point.

Sure. See above.

 >> This is based on the fact that one way one could test to see if the
 >> alternator was working was to disconnect the battery and see if the engine
 >> would still run.

 MvdV> Yes, with old cars that trick worked. But... the voltage regulator would
 MvdV> not work very well as there is no "buffer" any more. The voltage could
 MvdV> rise way above the specs.

Never heard of that thugh so I checked with my BIL who works as a mechanic
at SAAB and he says that disconnecting the battery most likely wouldn't have
any effeckt on the voltage at all.

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 * Origin: . (2:203/614.61)