Quote:
Originally Posted by Jaxonalden
Unbelievable...have you ever owned a recreational vehicle that didn't have a battery? At idle the headlight is dim, rev the motor and the light brightens up. That's what happens in a system with no battery (constant voltage).
So in your scenario the same thing would happen, quote "the alternator supplies *all* the current to run the car". The alternator is not run on a constant speed. Explain that one.
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Your first one... apples and oranges. And a system with no battery is NOT "constant voltage". That's why the headlights dim.
Your second one... That's what the voltage regulator is for. I already explained it as well.
Take a look here:
http://www.bcae1.com/charging.htm
Look at the second paragraph: "As long as the engine is running, all of the power for the accessories is delivered by the alternator. The battery is actually a load on the charging system. The only time that the battery would supply power with the engine running is when the current capacity of the alternator is exceeded or when engine is at a very low idle. "
I really don't have time to educate you on this. Please do some searches, and some reading.