I have been told, but dont believe and want some back up eaither way. When a greater amp load is placed on an alt, does the alt get harder to turn? Meaning... If I have my car on (lets just say with out a belt) and no accessories on will the drag on the pully be the same as if I had on all Accessories? This didnt make any sence to me, but I was told that the magnets inside the alt get stronger because they are electro magnets, that's how the alt creates more amps at lower RPM's. If you know the answer please post it with where you found the answer (website, book, ect. I have $50 on me being right and I need proof)
Thanks
<img src=http://donut.parodius.com/agtp/images/GonMad.gif>
What makes you think I'm crazy?
Well, there's a voltage regulator inside the alternator that keeps the output around 15 volts.. if the alternator is spinning slowly, the output will be lower than 15 volts... so the regulator will raise the field current (making the magnetic field stronger), resulting in a higher voltage... and vice versa.
More load on the alternator will make it more difficult to turn, yes. My Geo Metro is a prime example of that... if the accessory belt isn't tight enough, and I turn on the lights and heater together, the belt will slip and squeal like a baby pig. It's nasty!
That's from my electrician training years ago, though I'm sure you could find it somewhere on the internet. Try www.howstuffworks.com for starters.
My fiero was the same way. If the belt wasn't tight, it would squeak under a high load, which meant it was harder to turn the alternator.
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Thanks ya'll, as awalys your a big help. Unfortunaly that's $50 down the hole, oh well.
<img src=http://donut.parodius.com/agtp/images/GonMad.gif>
What makes you think I'm crazy?
sorry dude, you lose. any generator will produce a counter torque effect that gets greater with increasing current output. It's also called motor action in a generator. Ever been to a science museum where they have a hand cranked generator hooked up to a light bulb? You can turn the generator easily when the light is off, but when the light is on it gets harder to turn. The faster you turn it the more voltage is produced and more current flows therefore it gets even harder to turn.
The reverse happens in a motor. they generate counter electromotive force (counter voltage) also called generator action in a motor. This generates a voltage that opposes the voltage that created the motion to begin with.
